Search

Your search keyword '"Monacelli P"' showing total 972 results
Start Over Author "Monacelli P"
972 results on '"Monacelli P"'

51. Quantum Crystal Structure in the 250 K Superconducting Lanthanum Hydride

Author

Errea, Ion, Belli, Francesco, Monacelli, Lorenzo, Sanna, Antonio, Koretsune, Takashi, Tadano, Terumasa, Bianco, Raffaello, Calandra, Matteo, Arita, Ryotaro, Mauri, Francesco, and Flores-Livas, José A.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Materials Science
Abstract

The discovery of superconductivity at 200 K in the hydrogen sulfide system at large pressures [1] was a clear demonstration that hydrogen-rich materials can be high-temperature superconductors. The recent synthesis of LaH$_{10}$ with a superconducting critical temperature (T$_{\text{c}}$) of 250 K [2,3] places these materials at the verge of reaching the long-dreamed room-temperature superconductivity. Electrical and x-ray diffraction measurements determined a weakly pressure-dependent T$_{\text{c}}$ for LaH$_{10}$ between 137 and 218 gigapascals in a structure with a face-centered cubic (fcc) arrangement of La atoms [3]. Here we show that quantum atomic fluctuations stabilize in all this pressure range a high-symmetry Fm-3m crystal structure consistent with experiments, which has a colossal electron-phonon coupling of $\lambda\sim3.5$. Even if ab initio classical calculations neglecting quantum atomic vibrations predict this structure to distort below 230 GPa yielding a complex energy landscape with many local minima, the inclusion of quantum effects simplifies the energy landscape evidencing the Fm-3m as the true ground state. The agreement between the calculated and experimental T$_{\text{c}}$ values further supports this phase as responsible for the 250 K superconductivity. The relevance of quantum fluctuations in the energy landscape found here questions many of the crystal structure predictions made for hydrides within a classical approach that at the moment guide the experimental quest for room-temperature superconductivity [4,5,6]. Furthermore, quantum effects reveal crucial to sustain solids with extraordinary electron-phonon coupling that may otherwise be unstable [7]., Comment: 20 Pages, 14 Figures, 4 Tables

Published
2019
Full Text
View/download PDF

52. Strong anharmonicity and high thermoelectric efficiency in high temperature SnS from first-principles

Author

Aseginolaza, Unai, Bianco, Raffaello, Monacelli, Lorenzo, Paulatto, Lorenzo, Calandra, Matteo, Mauri, Francesco, Bergara, Aitor, and Errea, Ion

Subjects
Condensed Matter - Materials Science
Abstract

SnS and SnSe are isoelectronic materials with a common phase diagram. Recently, SnSe was found to be the most efficient intrinsic thermoelectric material in its high-temperature Cmcm phase above 800 K. Making use of first-principles calculations, here we show that the electronic and vibrational properties of both materials are very similar in this phase and, consequently, SnS is also expected to have a high thermoelectric figure of merit at high temperature in its Cmcm phase. In fact, the electronic power factor and lattice thermal conductivity are comparable for both materials, which ensures a similar figure of merit. As in the case of SnSe, the vibrational properties of SnS in the Cmcm phase are far from trivial and are dominated by huge anharmonic effects. Its phonon spectra are strongly renormalized by anharmonicity and the spectral functions of some particular in-plane modes depict anomalous non-lorentzian profiles. Finally, we show that non-perturbative anharmonic effects in the third-order force-constants are crucial in the calculation of the lattice thermal conductivity. Our results motivate new experiments in the high temperature regime to measure the figure of merit of SnS.

Published
2019
Full Text
View/download PDF

53. Quantum effects in muon spin spectroscopy within the stochastic self-consistent harmonic approximation

Author

Onuorah, Ifeanyi John, Bonfà, Pietro, De Renzi, Roberto, Monacelli, Lorenzo, Mauri, Francesco, Calandra, Matteo, and Errea, Ion

Subjects
Condensed Matter - Materials Science
Abstract

In muon spin rotation experiments the positive implanted muon vibrates with large zero point amplitude by virtue of its light mass. Quantum mechanical calculations of the host material usually treat the muon as a point impurity, ignoring this large vibrational amplitude. As a first order correction, the muon zero point motion is usually described within the harmonic approximation, despite the large anharmonicity of the crystal potential. Here we apply the stochastic self-consistent harmonic approximation, a quantum variational method devised to include strong anharmonic effects in total energy and vibrational frequency calculations, in order to overcome these limitations and provide an accurate ab initio description of the quantum nature of the muon. We applied this full quantum treatment to the calculation of the muon contact hyperfine field in textbook-case metallic systems, such as Fe, Ni, Co including MnSi and MnGe, significantly improving agreement with experiments. Our results show that muon vibrational frequencies are strongly renormalized by anharmonicity. Finally, in contrast to the harmonic approximation, we show that including quantum anharmonic fluctuations, the muon stabilizes at the octahedral site in bcc Fe., Comment: 10 pages

Published
2019
Full Text
View/download PDF

54. Final results on neutrino oscillation parameters from the OPERA experiment in the CNGS beam

Author

OPERA Collaboration, Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gorbunov, S., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Ogawa, S., Okateva, N., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., and Yoon, C. S.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The OPERA experiment has conclusively observed the appearance of tau neutrinos in the muon neutrino CNGS beam. Exploiting the OPERA detector capabilities, it was possible to isolate high purity samples of $\nu_{e}$, $\nu_{\mu}$ and $\nu_{\tau}$ charged current weak neutrino interactions, as well as neutral current weak interactions. In this Letter, the full dataset is used for the first time to test the three-flavor neutrino oscillation model and to derive constraints on the existence of a light sterile neutrino within the framework of the $3+1$ neutrino model. For the first time, tau and electron neutrino appearance channels are jointly used to test the sterile neutrino hypothesis. A significant fraction of the sterile neutrino parameter space allowed by LSND and MiniBooNE experiments is excluded at 90% C.L. In particular, the best-fit values obtained by MiniBooNE combining neutrino and antineutrino data are excluded at 3.3 $\sigma$ significance., Comment: 7 pages, 4 figures; Editors: Budimir Kli\v{c}ek and Matteo Tenti

Published
2019
Full Text
View/download PDF

55. Quantum enhancement of charge density wave in NbS$_2$ in the 2D limit

Author

Bianco, Raffaello, Errea, Ion, Monacelli, Lorenzo, Calandra, Matteo, and Mauri, Francesco

Subjects
Condensed Matter - Materials Science
Abstract

At ambient pressure, bulk 2H-NbS$_2$ displays no charge density wave instability at odds with the isostructural and isoelectronic compounds 2H-NbSe$_2$, 2H-TaS$_2$ and 2H-TaSe$_2$, and in disagreement with harmonic calculations. Contradictory experimental results have been reported in supported single layers, as 1H-NbS$_2$ on Au(111) does not display a charge density wave, while 1H-NbS$_2$ on 6H-SiC(0001) endures a $3\times 3$ reconstruction. Here, by carrying out quantum anharmonic calculations from first-principles, we evaluate the temperature dependence of phonon spectra in NbS$_2$ bulk and single layer as a function of pressure/strain. For bulk 2H-NbS$_2$, we find excellent agreement with inelastic X-ray spectra and demonstrate the removal of charge ordering due to anharmonicity. In the 2D limit, we find an enhanced tendency toward charge density wave order. Freestanding 1H-NbS$_2$ undergoes a $3\times3$ reconstruction, in agreement with data on 6H-SiC(0001) supported samples. Moreover, as strains smaller than $0.5\%$ in the lattice parameter are enough to completely remove the $3\times3$ superstructure, deposition of 1H-NbS$_2$ on flexible substrates or a small charge transfer via field-effect could lead to devices with dynamical switching on/off of charge order.

Published
2019
Full Text
View/download PDF

56. Intestinal Dysbiosis and the Developing Lung: The Role of Toll-Like Receptor 4 in the Gut-Lung Axis

Author

Wedgwood, Stephen, Gerard, Kimberly, Halloran, Katrina, Hanhauser, Ashley, Monacelli, Sveva, Warford, Cris, Thai, Phung N, Chiamvimonvat, Nipavan, Lakshminrusimha, Satyan, Steinhorn, Robin H, and Underwood, Mark A

Subjects
Paediatrics, Biomedical and Clinical Sciences, Pediatric, Lung, Preterm, Low Birth Weight and Health of the Newborn, Neonatal Respiratory Distress, Perinatal Period - Conditions Originating in Perinatal Period, Microbiome, Rare Diseases, Good Health and Well Being, Animals, Dysbiosis, Female, Gastrointestinal Microbiome, Hypertension, Pulmonary, Hypertrophy, Right Ventricular, NF-KappaB Inhibitor alpha, Rats, Rats, Sprague-Dawley, Toll-Like Receptor 4, intestinal dysbiosis, TLR4, pulmonary hypertension, bronchopulmonary dysplasia, premature infant, Enterobacteriaceae, Immunology, Medical Microbiology, Biochemistry and cell biology, Genetics
Abstract

BackgroundIn extremely premature infants, postnatal growth restriction (PNGR) is common and increases the risk of developing bronchopulmonary dysplasia (BPD) and pulmonary hypertension (PH). Mechanisms by which poor nutrition impacts lung development are unknown, but alterations in the gut microbiota appear to play a role. In a rodent model, PNGR plus hyperoxia causes BPD and PH and increases intestinal Enterobacteriaceae, Gram-negative organisms that stimulate Toll-like receptor 4 (TLR4). We hypothesized that intestinal dysbiosis activates intestinal TLR4 triggering systemic inflammation which impacts lung development.MethodsRat pups were assigned to litters of 17 (PNGR) or 10 (normal growth) at birth and exposed to room air or 75% oxygen for 14 days. Half of the pups were treated with the TLR4 inhibitor TAK-242 from birth or beginning at day 3. After 14 days, pulmonary arterial pressure was evaluated by echocardiography and hearts were examined for right ventricular hypertrophy (RVH). Lungs and serum samples were analyzed by western blotting and immunohistochemistry.ResultsPostnatal growth restriction + hyperoxia increased pulmonary arterial pressure and RVH with trends toward increased plasma IL1β and decreased IκBα, the inhibitor of NFκB, in lung tissue. Treatment with the TLR4 inhibitor attenuated PH and inflammation.ConclusionPostnatal growth restriction induces an increase in intestinal Enterobacteriaceae leading to PH. Activation of the TLR4 pathway is a promising mechanism by which intestinal dysbiosis impacts the developing lung.

Published
2020

58. Ultra-old patients and long-term survival after hip fracture: a real-world assessment

Author

Debora Tiso, Monica Pizzonia, Chiara Giannotti, Luca Tagliafico, Alessio Signori, Alessio Nencioni, and Fiammetta Monacelli

Subjects
hip fracture, ultra-old, frailty, overall mortality, prognostic score, Medicine (General), R5-920
Abstract

It’s still undetermined whether ultra-old persons, aged >90 years, are able to tolerate hip fracture surgical stress while maintaining their functional reserve, and even fewer studies have investigated the role of frailty on the risk of mortality, disability, or morbidity in the ultra-old. This is a prospective study performed at the Orthogeriatrics Ward of the IRCCS Policlinico San Martino (Genoa, Italy) that consecutively enrolled 205 older adult patients with hip fractures due to low-energy trauma. Namely, 85 patients were categorized as ultra-old, and 120 patients (64–89 years) were the younger control group. Demographic data, perioperative data, and rehabilitation data were collected. Here we estimated the overall survival and related predictive variables in hospitalized ultra-old hip fracture patients based on a methodologically robust frailty stratification (Rockwood 40-item tool). The median OS for the ultra-old was 18.7 months, which also showed a doubled 1-year mortality risk. Our findings assessed that frailty in the presence of malnutrition, delayed verticalization, and post-operative respiratory complications was associated with a two-fold increase in the risk of long-term mortality, irrespective of advanced chronological age in the ultra-old. Although the higher mortality rate in these patients may be related to a priori lower life expectancy, chronological age alone is an insufficient prognostic determinant for unfavorable outcomes. Our multicomponent prognostic score can be used in combination to stratify frailty in the ultra-old for timely screening and to deliver goals of care discussions prior to surgery, potentially targeting new orthogeriatric pathways for the improvement of appropriateness and treatment intensity.

Published
2023
Full Text
View/download PDF

59. Latest results of the OPERA experiment on nu-tau appearance in the CNGS neutrino beam

Author

Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Favier, J., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gorbunov, S., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Longhin, A., Loverre, P., Malenica, M., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Ogawa, S., Olchevsky, A., Okateva, N., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sadovsky, A., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Ustyuzhanin, A., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., and Yoon, C. S.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

OPERA is a long-baseline experiment designed to search for $\nu_{\mu}\to\nu_{\tau}$ oscillations in appearance mode. It was based at the INFN Gran Sasso laboratory (LNGS) and took data from 2008 to 2012 with the CNGS neutrino beam from CERN. After the discovery of $\nu_\tau$ appearance in 2015, with $5.1\sigma$ significance, the criteria to select $\nu_\tau$ candidates have been extended and a multivariate approach has been used for events identification. In this way the statistical uncertainty in the measurement of the oscillation parameters and of $\nu_\tau$ properties has been improved. Results are reported., Comment: 7 pages, 1 figure, conference: The 15th International Workshop on Tau Lepton Physics (tau2018)AB

Published
2018

60. Measurement of the cosmic ray muon flux seasonal variation with the OPERA detector

Author

Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gorbunov, S., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovčić, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Kliček, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Ljubičić, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Ogawa, S., Okateva, N., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipčević, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., and Yoon, C. S.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The OPERA experiment discovered muon neutrino into tau neutrino oscillations in appearance mode, detecting tau leptons by means of nuclear emulsion films. The apparatus was also endowed with electronic detectors with tracking capability, such as scintillator strips and resistive plate chambers. Because of its location, in the underground Gran Sasso laboratory, under 3800 m.w.e., the OPERA detector has also been used as an observatory for TeV muons produced by cosmic rays in the atmosphere. In this paper the measurement of the single muon flux modulation and of its correlation with the seasonal variation of the atmospheric temperature are reported.

Published
2018
Full Text
View/download PDF

61. Phonon Collapse and Second-Order Phase Transition in Thermoelectric SnSe

Author

Aseginolaza, Unai, Bianco, Raffaello, Monacelli, Lorenzo, Paulatto, Lorenzo, Calandra, Matteo, Mauri, Francesco, Bergara, Aitor, and Errea, Ion

Subjects
Condensed Matter - Materials Science
Abstract

Since 2014 the layered semiconductor SnSe in the high-temperature Cmcm phase is known to be the most efficient thermoelectric material. Making use of first-principles calculations we show that its vibrational and thermal transport properties are determined by huge non-perturbative anharmonic effects. We show that the transition from the Cmcm phase to the low-symmetry Pnma is a second-order phase transition driven by the collapse of a zone border phonon, whose frequency vanishes at the transition temperature. Our calculations show that the spectral function of the in-plane vibrational modes are strongly anomalous with shoulders and double-peak structures. We calculate the lattice thermal conductivity obtaining good agreement with experiments only when non-perturbative anharmonic scattering is included. Our results suggest that the good thermoelectric efficiency of SnSe is strongly affected by the non-perturbative anharmonicity. We expect similar effects to occur in other thermoelectric materials., Comment: 6 pages, 5 figures

Published
2018
Full Text
View/download PDF

62. Pressure and stress tensor of complex anharmonic crystals within the stochastic self-consistent harmonic approximation

Author

Monacelli, Lorenzo, Errea, Ion, Calandra, Matteo, and Mauri, Francesco

Subjects
Condensed Matter - Materials Science, Condensed Matter - Statistical Mechanics, Physics - Computational Physics
Abstract

The self-consisted harmonic approximation (SCHA) allows the computation of free energy of anharmonic crystals considering both quantum and thermal fluctuations. Recently, a stochastic implementation of the SCHA has been developed, tailored for applications that use total energy and forces computed from first principles. In this work, we extend the applicability of the stochastic SCHA to complex crystals with many degrees of freedom, with the optimisation of both the lattice vectors and the atomic positions. To this goal, we provide an expression for the evaluation of the pressure and stress tensor within the stochastic SCHA formalism. Moreover, we develop a more robust free energy minimisation algorithm, which allows us to perform the SCHA variational minimisation very efficiently in systems having a broad spectrum of phonon frequencies and many degrees of freedom. We test and illustrate the new approach with an application to the phase XI of water ice using density-functional theory. We find that the SCHA reproduces extremely well the experimental thermal expansion of ice in the whole temperature range between 0 K and 270 K, in contrast with the results obtained within the quasi-harmonic approximation, that underestimates the effect by about 25 %., Comment: 20 pages, 8 figures

Published
2018
Full Text
View/download PDF

63. Final results of the OPERA experiment on $\nu_\tau$ appearance in the CNGS beam

Author

OPERA Collaboration, Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Favier, J., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gornushkin, Y., Gorbunov, S., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Okateva, N., Olchevsky, A., Ogawa, S., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sadovsky, A., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibuya, H., Shibayama, E., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Ustyuzhanin, A., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., and Yoon, C. S.

Subjects
High Energy Physics - Experiment
Abstract

The OPERA experiment was designed to study $\nu_\mu\to\nu_\tau$ oscillations in appearance mode in the CNGS neutrino beam. In this letter we report the final analysis of the full data sample collected between 2008 and 2012, corresponding to $17.97\cdot 10^{19}$ protons on target. Selection criteria looser than in previous analyses have produced ten $\nu_\tau$ candidate events, thus reducing the statistical uncertainty in the measurement of the oscillation parameters and of $\nu_\tau$ properties. A multivariate approach for event identification has been applied to the candidate events and the discovery of $\nu_\tau$ appearance is confirmed with an improved significance level of 6.1 $\sigma$. $\Delta m^2_{23}$ has been measured, in appearance mode, with an accuracy of 20%. The measurement of $\nu_\tau$ CC cross-section, for the first time with a negligible contamination from $\bar{\nu}_\tau$, and the first direct observation of the $\nu_\tau$ lepton number are also reported., Comment: 7 pages, 3 figures

Published
2018
Full Text
View/download PDF

64. Entropy evaluation sheds light on ecosystem complexity

Author

Miotto, Mattia and Monacelli, Lorenzo

Subjects
Physics - Biological Physics, Condensed Matter - Statistical Mechanics, Quantitative Biology - Populations and Evolution, 37N25
Abstract

Preserving biodiversity and ecosystem stability is a challenge that can be pursued through modern statistical mechanics modeling. Here we introduce a variational maximum entropy-based algorithm to evaluate the entropy in a minimal ecosystem on a lattice in which two species struggle for survival. The method quantitatively reproduces the scale-free law of the prey shoals size, where the simpler mean-field approach fails: the direct near neighbor correlations are found to be the fundamental ingredient describing the system self-organized behavior. Furthermore, entropy allows the measurement of structural ordering, that is found to be a key ingredient in characterizing two different coexistence behaviors, one where predators form localized patches in a sea of preys and another where species display more complex patterns. The general nature of the introduced method paves the way for its application in many other systems of interest., Comment: 13 pages, 5 figures

Published
2018
Full Text
View/download PDF

65. Final results of the search for $\nu_{\mu} \to \nu_{e}$ oscillations with the OPERA detector in the CNGS beam

Author

OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Favier, J., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gornushkin, Y., Gorbunov, S., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Hosseini, B., Ishiguro, K., Iuliano, A., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meisel, F., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Okateva, N., Ogawa, S., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibuya, H., Shibayama, E., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., and Yoon, C. S.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The OPERA experiment has discovered the tau neutrino appearance in the CNGS muon neutrino beam, in agreement with the 3 neutrino flavour oscillation hypothesis. The OPERA neutrino interaction target, made of Emulsion Cloud Chamber, was particularly efficient in the reconstruction of electromagnetic showers. Moreover, thanks to the very high granularity of the emulsion films, showers induced by electrons can be distinguished from those induced by $\pi^0$s, thus allowing the detection of charged current interactions of electron neutrinos. In this paper the results of the search for electron neutrino events using the full dataset are reported. An improved method for the electron neutrino energy estimation is exploited. Data are compatible with the 3 neutrino flavour mixing model expectations and are used to set limits on the oscillation parameters of the 3+1 neutrino mixing model, in which an additional mass eigenstate $m_{4}$ is introduced. At high $\Delta m^{2}_{41}$ $( \gtrsim 0.1~\textrm{eV}^{2})$, an upper limit on $\sin^2 2\theta_{\mu e}$ is set to 0.021 at 90% C.L. and $\Delta m^2_{41} \gtrsim 4 \times 10^{-3}~\textrm{eV}^{2}$ is excluded for maximal mixing in appearance mode., Comment: Editors: M. Tenti and S. Vasina

Published
2018

66. Discovery potential for directional Dark Matter detection with nuclear emulsions

Author

Agafonova, N., Aleksandrov, A., Anokhina, A., Asada, T., Ashikhmin, V. V., Bodnarchuk, I., Buonaura, A., Chernyavskii, M., Chukanov, A., D'Ambrosio, N., De Lellis, G., Di Crescenzo, A., Di Marco, N., Dmitrievski, S., Enikeev, R. I., Fini, R. A., Galati, G., Gentile, V., Gorbunov, S., Gornushkin, Y., Guler, A. M., Ichiki, H., Katsuragawa, T., Konovalova, N., Kuge, K., Lauria, A., Lee, K. Y., Lista, L., Malgin, A. S., Managadze, A., Monacelli, P., Montesi, M. C., Naka, T., Okateva, N., Park, B. D., Podgrudkov, D., Polukhina, N., Pupilli, F., Roganova, T., Rogozhnikov, A., Rosa, G., Ryazhskaya, O. G., Sato, O., Shakiryanova, I. R., Shchedrina, T., Sirignano, C., Sohn, J. Y., Sotnikov, A., Starkov, N., Strolin, P., Tioukov, V., Umemoto, A., Ustyuzhanin, A., Yoon, C. S., Yoshimoto, M., and Vasina, S.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

Direct Dark Matter searches are nowadays one of the most fervid research topics with many experimental efforts devoted to the search for nuclear recoils induced by the scattering of Weakly Interactive Massive Particles (WIMPs). Detectors able to reconstruct the direction of the nucleus recoiling against the scattering WIMP are opening a new frontier to possibly extend Dark Matter searches beyond the neutrino background. Exploiting directionality would also prove the galactic origin of Dark Matter with an unambiguous signal-to-background separation. Indeed, the angular distribution of recoiled nuclei is centered around the direction of the Cygnus constellation, while the background distribution is expected to be isotropic. Current directional experiments are based on gas TPC whose sensitivity is limited by the small achievable detector mass. In this paper we present the discovery potential of a directional experiment based on the use of a solid target made of newly developed nuclear emulsions and of optical read-out systems reaching unprecedented nanometric resolution., Comment: 8 pages, 12 figures

Published
2017
Full Text
View/download PDF

68. Multiparametric Evaluation of Geriatric Patients Admitted to Intermediate Care: Impact on Geriatric Rehabilitation

Author

Giuseppe Murdaca, Sara Banchero, Marco Casciaro, Francesca Paladin, Michele Tafuro, Fiammetta Monacelli, Alessio Nencioni, Roberta Bruschetta, Giovanni Pioggia, Gennaro Tartarisco, and Sebastiano Gangemi

Subjects
elderly, geriatric, rehabilitation, intermediate care, multiparametric, statistics, Medicine (General), R5-920
Abstract

Optimizing the functional status of patients of any age is a major global public health goal. Rehabilitation is a process in which a person with disabilities is accompanied to achieve the best possible physical, functional, social, intellectual, and relational outcomes. The Intermediate Care Unit within the O.U. of Geriatrics and Gerontology of the San Martino Hospital in Genoa is focused on the treatment and motor reactivation of patients with geriatric pathologies. The objective of this study was to identify which factor, among the characteristics related to the patient and those identified by the geriatric evaluation, had the greatest impact on rehabilitation outcomes. Our findings revealed significant correlations between the Barthel Index delta, the 4AT Screening Test, and the number of drugs taken. This association highlights the potential benefits of medication management in enhancing the overall well-being and functional abilities of frail older adults, despite the literature suggesting that polypharmacotherapy is associated with a reduction in functional status and an increase in mortality. These findings underscore the significance of a multidimensional geriatric assessment. Refining and optimising these multidisciplinary approaches is the objective of a more effective geriatric rehabilitation strategy.

Published
2023
Full Text
View/download PDF

70. The SHERLOC Calibration Target on the Mars 2020 Perseverance Rover: Design, Operations, Outreach, and Future Human Exploration Functions

Author

Fries, Marc D., Lee, Carina, Bhartia, Rohit, Razzell Hollis, Joseph, Beegle, Luther W., Uckert, Kyle, Graff, Trevor G., Abbey, William, Bailey, Zachary, Berger, Eve L., Burton, Aaron S., Callaway, Michael J., Cardarelli, Emily L., Davis, Kristine N., DeFlores, Lauren, Edgett, Kenneth S., Fox, Allison C., Garrison, Daniel H., Haney, Nikole C., Harrington, Roger S., Jakubek, Ryan S., Kennedy, Megan R., Hickman-Lewis, Keyron, McCubbin, Francis M., Miller, Ed, Monacelli, Brian, Pollock, Randy, Rhodes, Richard, Siljeström, Sandra, Sharma, Sunanda, Smith, Caroline L., Steele, Andrew, Sylvia, Margarite, Tran, Vinh D., Weiner, Ryan H., Yanchilina, Anastasia G., and Aileen Yingst, R.

Published
2022
Full Text
View/download PDF

72. Readout technologies for directional WIMP Dark Matter detection

Author

Battat, J. B. R., Irastorza, I. G., Aleksandrov, A., Guler, M. Ali, Asada, T., Baracchini, E., Billard, J., Bosson, G., Bourrion, O., Bouvier, J., Buonaura, A., Burdge, K., Cebrian, S., Colas, P., Consiglio, L., Dafni, T., D'Ambrosio, N., Deaconu, C., De Lellis, G., Descombes, T., Di Crescenzo, A., Di Marco, N., Druitt, G., Eggleston, R., Ferrer-Ribas, E., Fusayasu, T., Galan, J., Galati, G., Garcia, J. A., Garza, J. G., Gentile, V., Garcia-Sciveres, M., Giomataris, Y., Guerrero, N., Guillaudin, O., Harton, J., Hashimoto, T., Hedges, M. T., Iguaz, F., Ikeda, T., Jaegle, I., Kadyk, J. A., Katsuragawa, T., Komura, S., Kubo, H., Kuge, K., Lamblin, J., Lauria, A., Lee, E. R., Lewis, P., Leyton, M., Loomba, D., Lopez, J. P., Luzon, G., Mayet, F., Mirallas, H., Miuchi, K., Mizumoto, T., Mizumura, Y., Monacelli, P., Monroe, J., Montesi, M. C., Naka, T., Nakamura, K., Nishimura, H., Ochi, A., Papevangelou, T., Parker, J. D., Phan, N. S., Pupilli, F., Richer, J. P., Riffard, Q., Rosa, G., Santos, D., Sawano, T., Sekiya, H., Seong, I. S., Snowden-Ifft, D. P., Spooner, N. J. C., Sugiyama, A., Taishaku, R., Takada, A., Takeda, A., Tanaka, M., Tanimori, T., Thorpe, T. N., Tioukov, V., Tomita, H., Umemoto, A., Vahsen, S. E., Yamaguchi, Y., Yoshimoto, M., and Zayas, E.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

The measurement of the direction of WIMP-induced nuclear recoils is a compelling but technologically challenging strategy to provide an unambiguous signature of the detection of Galactic dark matter. Most directional detectors aim to reconstruct the dark-matter-induced nuclear recoil tracks, either in gas or solid targets. The main challenge with directional detection is the need for high spatial resolution over large volumes, which puts strong requirements on the readout technologies. In this paper we review the various detector readout technologies used by directional detectors. In particular, we summarize the challenges, advantages and drawbacks of each approach, and discuss future prospects for these technologies., Comment: 58 pages, 26 figures, accepted by Physics Reports

Published
2016
Full Text
View/download PDF

73. NEWS: Nuclear Emulsions for WIMP Search

Author

Aleksandrov, A., Anokhina, A., Asada, T., Bender, D., Bodnarchuk, I., Buonaura, A., Buontempo, S., Chernyavskii, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Di Crescenzo, A., Di Marco, N., Dmitrievski, S., Dzhatdoev, T., Fini, R. A., Furuya, S., Galati, G., Gentile, V., Gorbunov, S., Gornushkin, Y., Guler, A. M., Ichiki, H., Kamiscioglu, C., Kamiscioglu, M., Katsuragawa, T., Kimura, M., Konovalova, N., Kuge, K., Lauria, A., Loverre, P., Machii, S., Managadze, A., Monacelli, P., Montesi, M. C., Naka, T., Nakamura, M., Nakano, T., Pastore, A., Podgrudkov, D., Polukhina, N., Pupilli, F., Roganova, T., Rosa, G., Sato, O., Shchedrina, T., Simone, S., Sirignano, C., Sotnikov, A., Starkov, N., Strolin, P., Tawara, Y., Tioukov, V., Umemoto, A., Vladymyrov, M., Yoshimoto, M., and Zemskova, S.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

Nowadays there is compelling evidence for the existence of dark matter in the Universe. A general consensus has been expressed on the need for a directional sensitive detector to confirm, with a complementary approach, the candidates found in conventional searches and to finally extend their sensitivity beyond the limit of neutrino-induced background. We propose here the use of a detector based on nuclear emulsions to measure the direction of WIMP-induced nuclear recoils. The production of nuclear emulsion films with nanometric grains is established. Several measurement campaigns have demonstrated the capability of detecting sub-micrometric tracks left by low energy ions in such emulsion films. Innovative analysis technologies with fully automated optical microscopes have made it possible to achieve the track reconstruction for path lengths down to one hundred nanometers and there are good prospects to further exceed this limit. The detector concept we propose foresees the use of a bulk of nuclear emulsion films surrounded by a shield from environmental radioactivity, to be placed on an equatorial telescope in order to cancel out the effect of the Earth rotation, thus keeping the detector at a fixed orientation toward the expected direction of galactic WIMPs. We report the schedule and cost estimate for a one-kilogram mass pilot experiment, aiming at delivering the first results on the time scale of six years.

Published
2016

74. Adaptive Visualisation System for Construction Building Information Models Using Saliency

Author

Martin, Hugo, Chevallier, Sylvain, and Monacelli, Eric

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Artificial Intelligence
Abstract

Building Information Modeling (BIM) is a recent construction process based on a 3D model, containing every component related to the building achievement. Architects, structure engineers, method engineers, and others participant to the building process work on this model through the design-to-construction cycle. The high complexity and the large amount of information included in these models raise several issues, delaying its wide adoption in the industrial world. One of the most important is the visualization: professionals have difficulties to find out the relevant information for their job. Actual solutions suffer from two limitations: the BIM models information are processed manually and insignificant information are simply hidden, leading to inconsistencies in the building model. This paper describes a system relying on an ontological representation of the building information to label automatically the building elements. Depending on the user's department, the visualization is modified according to these labels by automatically adjusting the colors and image properties based on a saliency model. The proposed saliency model incorporates several adaptations to fit the specificities of architectural images., Comment: 10 pages, 5 figures, to be submitted

Published
2016

75. The Effects of Tinnitus in Probabilistic Learning Tasks: Protocol for an Ecological Momentary Assessment Study

Author

Lili Zhang, Greta Monacelli, Himanshu Vashisht, Winfried Schlee, Berthold Langguth, and Tomas Ward

Subjects
Medicine, Computer applications to medicine. Medical informatics, R858-859.7
Abstract

BackgroundChronic tinnitus is an increasing worldwide health concern, causing a significant burden to the health care system each year. The COVID-19 pandemic has seen a further increase in reported cases. For people with tinnitus, symptoms are exacerbated because of social isolation and the elevated levels of anxiety and depression caused by quarantines and lockdowns. Although it has been reported that patients with tinnitus can experience changes in cognitive capabilities, changes in adaptive learning via decision-making tasks for people with tinnitus have not yet been investigated. ObjectiveIn this study, we aim to assess state- and trait-related impairments in adaptive learning ability on probabilistic learning tasks among people with tinnitus. Given that performance in such tasks can be quantified through computational modeling methods using a small set of neural-informed model parameters, such approaches are promising in terms of the assessment of tinnitus severity. We will first examine baseline differences in the characterization of decision-making under uncertainty between healthy individuals and people with tinnitus in terms of differences in the parameters of computational models in a cross-sectional experiment. We will also investigate whether these computational markers, which capture characteristics of decision-making, can be used to understand the cognitive impact of tinnitus symptom fluctuations through a longitudinal experimental design. MethodsWe have developed a mobile app, AthenaCX, to deliver e-consent and baseline tinnitus and psychological assessments as well as regular ecological momentary assessments (EMAs) of perceived tinnitus loudness and a web-based aversive version of a probabilistic decision-making task, which can be triggered based on the participants’ responses to the EMA surveys. Computational models will be developed to fit participants’ choice data in the task, and cognitive parameters will be estimated to characterize participants’ current ability to adapt learning to the change of the simulated environment at each session when the task is triggered. Linear regression analysis will be conducted to evaluate the impacts of baseline tinnitus severity on adapting decision-making performance. Repeated measures linear regression analysis will be used to examine model-derived parameters of decision-making in measuring real-time perceived tinnitus loudness fluctuations. ResultsEthics approval was received in December 2020 from Dublin City University (DCUREC/2021/070). The implementation of the experiments, including both the surveys and the web-based decision-making task, has been prepared. Recruitment flyers have been shared with audiologists, and a video instruction has been created to illustrate to the participants how to participate in the experiment. We expect to finish data collection over 12 months and complete data analysis 6 months after this. The results are expected to be published in December 2023. ConclusionsWe believe that EMA with context-aware triggering can facilitate a deeper understanding of the effects of tinnitus symptom severity upon decision-making processes as measured outside of the laboratory. International Registered Report Identifier (IRRID)PRR1-10.2196/36583

Published
2022
Full Text
View/download PDF

76. OPERA tau neutrino charged current interactions

Author

N. Agafonova, A. Alexandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, M. Chernyavskiy, A. Chukanov, L. Consiglio, N. D’Ambrosio, G. De Lellis, M. De Serio, P. del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievsky, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, F. Fornari, T. Fukuda, G. Galati, A. Garfagnini, V. Gentile, J. Goldberg, S. Gorbunov, Y. Gornushkin, G. Grella, A. M. Guler, C. Gustavino, C. Hagner, T. Hara, T. Hayakawa, A. Hollnagel, K. Ishiguro, A. Iuliano, K. Jakovčić, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, S. H. Kim, N. Kitagawa, B. Kliček, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, F. Laudisio, A. Lauria, A. Lavasa, A. Longhin, P. Loverre, A. Malgin, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, S. Mikado, M. Miyanishi, F. Mizutani, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, K. Niwa, S. Ogawa, N. Okateva, K. Ozaki, A. Paoloni, B. D. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, T. Roganova, H. Rokujo, G. Rosa, O. Ryazhskaya, O. Sato, I. Shakirianova, A. Schembri, T. Shchedrina, E. Shibayama, H. Shibuya, T. Shiraishi, T. Šimko, S. Simone, C. Sirignano, G. Sirri, A. Sotnikov, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipčević, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, I. Tsanaktsidis, S. Tufanli, A. Ustyuzhanin, S. Vasina, M. Vidal García, P. Vilain, E. Voevodina, L. Votano, J. L. Vuilleumier, G. Wilquet, and C. S. Yoon

Subjects
Science
Abstract

Measurement(s) tau neutrino Technology Type(s) detector Sample Characteristic - Environment neutrino beam Sample Characteristic - Location Laboratori Nazionali del Gran Sasso Machine-accessible metadata file describing the reported data: https://doi.org/10.6084/m9.figshare.14979858

Published
2021
Full Text
View/download PDF

78. Intrinsic neutron background of nuclear emulsions for directional Dark Matter searches

Author

Alexandrov, A., Asada, T., Buonaura, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., Di Crescenzo, A., Di Marco, N., Di Vacri, M. L., Furuya, S., Galati, G., Gentile, V., Katsuragawa, T., Laubenstein, M., Lauria, A., Loverre, P. F., Machii, S., Monacelli, P., Montesi, M. C., Naka, T., Pupilli, F., Rosa, G., Sato, O., Strolin, P., Tioukov, V., Umemoto, A., and Yoshimoto, M.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

Recent developments of the nuclear emulsion technology led to the production of films with nanometric silver halide grains suitable to track low energy nuclear recoils with submicrometric length. This improvement opens the way to a directional Dark Matter detection, thus providing an innovative and complementary approach to the on-going WIMP searches. An important background source for these searches is represented by neutron-induced nuclear recoils that can mimic the WIMP signal. In this paper we provide an estimation of the contribution to this background from the intrinsic radioactive contamination of nuclear emulsions. We also report the induced background as a function of the read-out threshold, by using a GEANT4 simulation of the nuclear emulsion, showing that it amounts to about 0.06 neutrons per year per kilogram, fully compatible with the design of a 10 kg$\times$year exposure., Comment: Revised version

Published
2015
Full Text
View/download PDF

79. Discovery of tau neutrino appearance in the CNGS neutrino beam with the OPERA experiment

Author

OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bodnarchuk, I., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Büttner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Goldberg, J., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, H., Hollnagel, A., Hosseini, B., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, J. H., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Ljubicic, A., Longhin, A., Loverre, P. F., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matsushita, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Olchevsky, A., Omura, T., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Park, I. G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Schmidt-Parzefall, W., Shakirianova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladymyrov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., and Zemskova, S.

Subjects
High Energy Physics - Experiment
Abstract

The OPERA experiment was designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode, i.e. by detecting the $\tau$-leptons produced in charged current $\nu_{\tau}$ interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of $\nu_{\mu} \rightarrow \nu_{\tau}$ appearance, achieved with four candidate events in a sub-sample of the data, was previously reported. In this paper, a fifth $\nu_{\tau}$ candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow assessing the discovery of $\nu_{\mu}\rightarrow \nu_{\tau}$ oscillations in appearance mode with a significance larger than 5 $\sigma$., Comment: 7 pages, 3 figures

Published
2015
Full Text
View/download PDF

80. A facility to Search for Hidden Particles (SHiP) at the CERN SPS

Author

SHiP Collaboration, Anelli, M., Aoki, S., Arduini, G., Back, J. J., Bagulya, A., Baldini, W., Baranov, A., Barker, G. J., Barsuk, S., Battistin, M., Bauche, J., Bay, A., Bayliss, V., Bellagamba, L., Bencivenni, G., Bertani, M., Bezshyyko, O., Bick, D., Bingefors, N., Blondel, A., Bogomilov, M., Boyarsky, A., Bonacorsi, D., Bondarenko, D., Bonivento, W., Borburgh, J., Bradshaw, T., Brenner, R., Breton, D., Brook, N., Bruschi, M., Buonaura, A., Buontempo, S., Cadeddu, S., Calcaterra, A., Calviani, M., Campanelli, M., Capoccia, C., Cecchetti, A., Chatterjee, A., Chauveau, J., Chepurnov, A., Chernyavskiy, M., Ciambrone, P., Cicalo, C., Conti, G., Cornelis, K., Courthold, M., Dallavalle, M. G., D'Ambrosio, N., De Lellis, G., De Serio, M., Dedenko, L., Di Crescenzo, A., Di Marco, N., Dib, C., Dietrich, J., Dijkstra, H., Domenici, D., Donskov, S., Druzhkin, D., Ebert, J., Egede, U., Egorov, A., Egorychev, V., Alaoui, M. A. El, Enik, T., Etenko, A., Fabbri, F., Fabbri, L., Fedorova, G., Felici, G., Ferro-Luzzi, M., Fini, R. A., Franke, M., Fraser, M., Galati, G., Giacobbe, B., Goddard, B., Golinka-Bezshyyko, L., Golubkov, D., Golutvin, A., Gorbunov, D., Graverini, E., Grenard, J-L, Guler, A. M., Hagner, C., Hakobyan, H., Helo, J. C., van Herwijnen, E., Horvath, D., Iacovacci, M., Iaselli, G., Jacobsson, R., Kadenko, I., Kamiscioglu, M., Kamiscioglu, C., Khaustov, G., Khotjansev, A., Kilminster, B., Kim, V., Kitagawa, N., Kodama, K., Kolesnikov, A., Kolev, D., Komatsu, M., Konovalova, N., Koretskiy, S., Korolko, I., Korzenev, A., Kovalenko, S., Kudenko, Y., Kuznetsova, E., Lacker, H., Lai, A., Lanfranchi, G., Lauria, A., Lebbolo, H., Levy, J. -M., Lista, L., Loverre, P., Lukiashin, A., Lyubovitskij, V. E., Malinin, A., Manfredi, M., Perillo-Marcone, A., Marrone, A., Matev, R., Messomo, E. N., Mermod, P., Mikado, S., Mikhaylov, Yu., Miller, J., Milstead, D., Mineev, O., Mingazheva, R., Mitselmakher, G., Miyanishi, M., Monacelli, P., Montanari, A., Montesi, M. C., Morello, G., Morishima, K., Movtchan, S., Murzin, V., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nurakhov, N., Obinyakov, B., Ocalan, K., Ogawa, S., Oreshkin, V., Orlov, A., Osborne, J., Pacholek, P., Panman, J., Paoloni, A., Paparella, L., Pastore, A., Patel, M., Petridis, K., Petrushin, M., Poli-Lener, M., Polukhina, N., Polyakov, V., Prokudin, M., Puddu, G., Pupilli, F., Rademakers, F., Rakai, A., Rawlings, T., Redi, F., Ricciardi, S., Rinaldesi, R., Roganova, T., Rogozhnikov, A., Rokujo, H., Romaniouk, A., Rosa, G., Rostovtseva, I., Rovelli, T., Ruchayskiy, O., Ruf, T., Saitta, G., Samoylenko, V., Samsonov, V., Ull, A. Sanz, Saputi, A., Sato, O., Schmidt-Parzefall, W., Serra, N., Sgobba, S., Shaposhnikov, M., Shatalov, P., Shaykhiev, A., Shchutska, L., Shevchenko, V., Shibuya, H., Shitov, Y., Silverstein, S., Simone, S., Skorokhvatov, M., Smirnov, S., Solodko, E., Sosnovtsev, V., Spighi, R., Spinetti, M., Starkov, N., Storaci, B., Strabel, C., Strolin, P., Takahashi, S., Teterin, P., Tioukov, V., Tommasini, D., Treille, D., Tsenov, R., Tshchedrina, T., Ustyuzhanin, A., Vannucci, F., Venturi, V., Villa, M., Vincke, Heinz, Vincke, Helmut, Vladymyrov, M., Xella, S., Yalvac, M., Yershov, N., Yilmaz, D., Yilmazer, A. U., Vankova-Kirilova, G., Zaitsev, Y., and Zoccoli, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

A new general purpose fixed target facility is proposed at the CERN SPS accelerator which is aimed at exploring the domain of hidden particles and make measurements with tau neutrinos. Hidden particles are predicted by a large number of models beyond the Standard Model. The high intensity of the SPS 400~GeV beam allows probing a wide variety of models containing light long-lived exotic particles with masses below ${\cal O}$(10)~GeV/c$^2$, including very weakly interacting low-energy SUSY states. The experimental programme of the proposed facility is capable of being extended in the future, e.g. to include direct searches for Dark Matter and Lepton Flavour Violation., Comment: Technical Proposal

Published
2015

81. Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Author

OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bodnarchuk, I., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Büttner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Goldberg, J., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hollnagel, A., Hosseini, B., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, J. H., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Ljubicic, A., Longhin, A., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Omura, T., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Park, I. G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakirianova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladymyrov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., and Zemskova, S.

Subjects
High Energy Physics - Experiment
Abstract

The OPERA experiment, exposed to the CERN to Gran Sasso $\nu_\mu$ beam, collected data from 2008 to 2012. Four oscillated $\nu_\tau$ Charged Current interaction candidates have been detected in appearance mode, which are consistent with $\nu_\mu \to \nu_\tau$ oscillations at the atmospheric $\Delta m^2$ within the "standard" three-neutrino framework. In this paper, the OPERA $\nu_\tau$ appearance results are used to derive limits on the mixing parameters of a massive sterile neutrino., Comment: 11 pages, 4 figures; reference to Planck result updated in the Introduction. Submitted to JHEP

Published
2015
Full Text
View/download PDF

82. SIRT6 enhances oxidative phosphorylation in breast cancer and promotes mammary tumorigenesis in mice

Author

Pamela Becherini, Irene Caffa, Francesco Piacente, Patrizia Damonte, Valerio G. Vellone, Mario Passalacqua, Andrea Benzi, Tommaso Bonfiglio, Daniele Reverberi, Amr Khalifa, Moustafa Ghanem, Ana Guijarro, Luca Tagliafico, Marzia Sucameli, Angelica Persia, Fiammetta Monacelli, Michele Cea, Santina Bruzzone, Silvia Ravera, and Alessio Nencioni

Subjects
SIRT6, Breast cancer, Cancer metabolism, Mammary tumorigenesis, Oxidative phosphorylation, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Abstract

Abstract Background Sirtuin 6 (SIRT6) is a NAD+-dependent deacetylase with key roles in cell metabolism. High SIRT6 expression is associated with adverse prognosis in breast cancer (BC) patients. However, the mechanisms through which SIRT6 exerts its pro-oncogenic effects in BC remain unclear. Here, we sought to define the role of SIRT6 in BC cell metabolism and in mouse polyoma middle T antigen (PyMT)-driven mammary tumors. Methods We evaluated the effect of a heterozygous deletion of Sirt6 on tumor latency and survival of mouse mammary tumor virus (MMTV)-PyMT mice. The effect of SIRT6 silencing on human BC cell growth was assessed in MDA-MB-231 xenografts. We also analyzed the effect of Sirt6 heterozygous deletion, of SIRT6 silencing, and of the overexpression of either wild-type (WT) or catalytically inactive (H133Y) SIRT6 on BC cell pyruvate dehydrogenase (PDH) expression and activity and oxidative phosphorylation (OXPHOS), including respiratory complex activity, ATP/AMP ratio, AMPK activation, and intracellular calcium concentration. Results The heterozygous Sirt6 deletion extended tumor latency and mouse survival in the MMTV-PyMT mouse BC model, while SIRT6 silencing slowed the growth of MDA-MB-231 BC cell xenografts. WT, but not catalytically inactive, SIRT6 enhanced PDH expression and activity, OXPHOS, and ATP/AMP ratio in MDA-MB-231 and MCF7 BC cells. Opposite effects were obtained by SIRT6 silencing, which also blunted the expression of genes encoding for respiratory chain proteins, such as UQCRFS1, COX5B, NDUFB8, and UQCRC2, and increased AMPK activation in BC cells. In addition, SIRT6 overexpression increased, while SIRT6 silencing reduced, intracellular calcium concentration in MDA-MB-231 cells. Consistent with these findings, the heterozygous Sirt6 deletion reduced the expression of OXPHOS-related genes, the activity of respiratory complexes, and the ATP/AMP ratio in tumors isolated from MMTV-PyMT mice. Conclusions Via its enzymatic activity, SIRT6 enhances PDH expression and activity, OXPHOS, ATP/AMP ratio, and intracellular calcium concentration, while reducing AMPK activation, in BC cells. Thus, overall, SIRT6 inhibition appears as a viable strategy for preventing or treating BC.

Published
2021
Full Text
View/download PDF

83. van der Waals driven anharmonic melting of the 3D charge density wave in VSe2

Author

Josu Diego, A. H. Said, S. K. Mahatha, Raffaello Bianco, Lorenzo Monacelli, Matteo Calandra, Francesco Mauri, K. Rossnagel, Ion Errea, and S. Blanco-Canosa

Subjects
Science
Abstract

The nature of the charge density wave transition in VSe2 is still debated. Here, the authors demonstrate that the transition is mainly driven by electron-phonon interactions, despite the presence of the Fermi-surface nesting, and that Wan-der-Waals forces are responsible for melting of the charge density wave order.

Published
2021
Full Text
View/download PDF

84. Perceptions of Safety and Stress Among Health Professionals: The Role of Care Unit Identification as a Protective Factor During the COVID-19 Pandemic

Author

Chiara Panari, Luca Caricati, Gaetano Gallo, Chiara Bonetti, Alice Bonini, Nadia Monacelli, and Alfonso Sollami

Subjects
health professionals, work engagement, teamwork identification, perception of safety climate, burnout, distress, Psychology, BF1-990
Abstract

The present study aimed to investigate the role of motivational process and coping resources in health professionals during the COVID-19 emergency examining the role of Care Unit Identification and safety climate perception as resources that can help nurses to cope with stressors. A cross-sectional research design was used and 218 nurses completed a self-report questionnaire measuring: Perception of safety, Care Unit identification, Work Engagement, Psychological Distress, and Burnout. Results revealed that Work Engagement was significantly related with Burnout (b = −0.209, 95%CI [−0.309; −0.109]) and Distress (b = −0.355, 95%CI [−0.529; −0.18]) especially when the Care Unit identification is high (b = −0.303, 95%CI [−0.448; −0.157] and b = −0.523, 95%CI [−0.772; −0.275], respectively). The safety perception was positively related to Work Engagement (b = 0.315, 95%CI [0.198; 0.433]) and had an indirect effect on psychological Distress (b = −0.112, 95%CI [−0.181; −0.042]) and Burnout (b = −0.066, 95%CI [−0.105; −0.027]). High levels of both Care Unit identification and perception of safety, along with personal work engagement, appear to protect nurses from burnout and psychological distress. Findings suggest that the effort to improve teamwork identification and ensures an adequate degree of perceived safety for healthcare professionals need to be maintained and reinforced as they positively impact nurses’ wellbeing.

Published
2022
Full Text
View/download PDF

87. Observation of nu_tau appearance in the CNGS beam with the OPERA experiment

Author

OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Asada, T., Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Buttne, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Giacomelli, G., Goellnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Guler, M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Katsuragawa, T., Kawada, J., Kawahara, H., Kim, J. H., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malenica, M., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Meyer, M., Mikado, S., Miyanishi, M., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B. D., Park, I. G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Umemoto, A., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., Yaguchi, I., Yoshimoto, M., Zemskova, S., and Zghiche, A.

Subjects
High Energy Physics - Experiment
Abstract

The OPERA experiment is searching for nu_mu -> nu_tau oscillations in appearance mode i.e. via the direct detection of tau leptons in nu_tau charged current interactions. The evidence of nu_mu -> nu_tau appearance has been previously reported with three nu_tau candidate events using a sub-sample of data from the 2008-2012 runs. We report here a fourth nu_tau candidate event, with the tau decaying into a hadron, found after adding the 2012 run events without any muon in the final state to the data sample. Given the number of analysed events and the low background, nu_mu -> nu_tau oscillations are established with a significance of 4.2sigma., Comment: Submitted to Progress of Theoretical and Experimental Physics (PTEP)

Published
2014
Full Text
View/download PDF

88. Determination of the muon charge sign with the dipolar spectrometers of the OPERA experiment

Author

OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Büttner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Giacomelli, G., Goellnitz, C., Goldberg, J., Goloubkov, D., Gornushkin, Y., Grella, G., Guler, M., Gustavino, C., Hagner, C., Hara, T., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kawada, J., Kim, J. H., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Meyer, M., Mikado, S., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B. D., Park, I. G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Rokujo, H., Roganova, T., Rosa, G., Rostovtseva, I., Ryazhskaya, O., Sato, O., Sato, Y., Schembri, A., Shakiryanova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., Zaitsev, Y., Zemskova, S., and Zghiche, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The OPERA long-baseline neutrino-oscillation experiment has observed the direct appearance of $\nu_\tau$ in the CNGS $\nu_\mu$ beam. Two large muon magnetic spectrometers are used to identify muons produced in the $\tau$ leptonic decay and in $\nu_\mu^{CC}$ interactions by measuring their charge and momentum. Besides the kinematic analysis of the $\tau$ decays, background resulting from the decay of charmed particles produced in $\nu_\mu^{CC}$ interactions is reduced by efficiently identifying the muon track. A new method for the charge sign determination has been applied, via a weighted angular matching of the straight track-segments reconstructed in the different parts of the dipole magnets. Results obtained for Monte Carlo and real data are presented. Comparison with a method where no matching is used shows a significant reduction of up to 40\% of the fraction of wrongly determined charges., Comment: 10 pages. Improvements in the text

Published
2014

89. Procedure for short-lived particle detection in the OPERA experiment and its application to charm decays

Author

Agafonova, N., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Buttner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Giacomelli, G., Gollnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Guler, M., Gustavino, C., Hagner, C., Hara, T., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kawada, J., Kim, J. H., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B. D., Park, I. G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Rokujo, H., Roganova, T., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strauss, T., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., Zemskova, S., and Zghiche, A.

Subjects
High Energy Physics - Experiment
Abstract

The OPERA experiment, designed to perform the first observation of $\nu_\mu \rightarrow \nu_\tau$ oscillations in appearance mode through the detection of the $\tau$ leptons produced in $\nu_\tau$ charged current interactions, has collected data from 2008 to 2012. In the present paper, the procedure developed to detect $\tau$ particle decays, occurring over distances of the order of 1 mm from the neutrino interaction point, is described in detail. The results of its application to the search for charmed hadrons are then presented as a validation of the methods for $\nu_\tau$ appearance detection.

Published
2014
Full Text
View/download PDF

90. Measurement of TeV atmospheric muon charge ratio with the full OPERA data

Author

Agafonova, N., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Buettner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Giacomelli, G., Goellnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Guler, M., Gustavino, C., Hagner, C., Hara, T., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kawada, J., Kim, J. H., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B. D., Park, I. G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Rokujo, H., Roganova, T., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., Zemskova, S., and Zghiche, A.

Subjects
High Energy Physics - Experiment
Abstract

The OPERA detector, designed to search for $\nu_{\mu} \to \nu_{\tau}$ oscillations in the CNGS beam, is located in the underground Gran Sasso laboratory, a privileged location to study TeV-scale cosmic rays. For the analysis here presented, the detector was used to measure the atmospheric muon charge ratio in the TeV region. OPERA collected charge-separated cosmic ray data between 2008 and 2012. More than 3 million atmospheric muon events were detected and reconstructed, among which about 110000 multiple muon bundles. The charge ratio $R_{\mu} \equiv N_{\mu^+}/N_{\mu^-}$ was measured separately for single and for multiple muon events. The analysis exploited the inversion of the magnet polarity which was performed on purpose during the 2012 Run. The combination of the two data sets with opposite magnet polarities allowed minimizing systematic uncertainties and reaching an accurate determination of the muon charge ratio. Data were fitted to obtain relevant parameters on the composition of primary cosmic rays and the associated kaon production in the forward fragmentation region. In the surface energy range 1-20 TeV investigated by OPERA, $R_{\mu}$ is well described by a parametric model including only pion and kaon contributions to the muon flux, showing no significant contribution of the prompt component. The energy independence supports the validity of Feynman scaling in the fragmentation region up to $200$ TeV/nucleon primary energy., Comment: 8 pages, 2 figures, 4 tables

Published
2014
Full Text
View/download PDF

91. Evidence for $\nu_\mu \to \nu_\tau$ appearance in the CNGS neutrino beam with the OPERA experiment

Author

Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Asada, T., Autiero, D., Dhahbi, A. Ben, Badertscher, A., Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Brunet, F., Brunetti, G., Buonaura, A., Buontempo, S., Buettner, B., Chaussard, L., Chernyavsky, M., Chiarella, V., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Favier, J., Ferber, T., Ferone, G., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Giacomelli, G., Goellnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Grianti, F., Guler, M., Gustavino, C., Hagner, C., Hakamata, K., Hara, T., Hayakawa, T., Hierholzer, M., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Ishikawa, M., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Katsuragawa, T., Kawada, J., Kawahara, H., Kim, J. H., Kim, S. H., Kimura, M., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Marteau, J., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Migliozzi, P., Mikado, S., Miyanishi, M., Miyashita, E., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B. D., Park, I. G., Pastore, A., Patrizii, L., Pennacchio, E., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pretzl, K., Pupilli, F., Rescigno, R., Roda, M., Rokujo, H., Roganova, T., Rosa, G., Rostovtseva, I., Rubbia, A., Ryazhskaya, O., Sato, O., Sato, Y., Schembri, A., Schmidt-Parzefal, W., Shakiryanova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strauss, T., Strolin, P., Suzuki, K., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., Yoshida, J., Yoshimoto, M., Zaitsev, Y., Zemskova, S., and Zghiche, A.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The OPERA experiment is designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode i.e. through the direct observation of the $\tau$ lepton in $\nu_{\tau}$ charged current interactions. The experiment has taken data for five years, since 2008, with the CERN Neutrino to Gran Sasso beam. Previously, two $\nu_{\tau}$ candidates with a $\tau$ decaying into hadrons were observed in a sub-sample of data of the 2008-2011 runs. Here we report the observation of a third $\nu_\tau$ candidate in the $\tau^-\to\mu^-$ decay channel coming from the analysis of a sub-sample of the 2012 run. Taking into account the estimated background, the absence of $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations is excluded at the 3.4 $\sigma$ level., Comment: 9 pages, 5 figures, 1 tables

Published
2014
Full Text
View/download PDF

92. First observation of a tau neutrino charged current interaction with charm production in the OPERA experiment

Author

N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, M. Chernyavskiy, A. Chukanov, L. Consiglio, N. D’Ambrosio, G. De Lellis, M. De Serio, P. del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, F. Fornari, T. Fukuda, G. Galati, A. Garfagnini, V. Gentile, J. Goldberg, S. Gorbunov, Y. Gornushkin, G. Grella, A. M. Guler, C. Gustavino, C. Hagner, T. Hara, T. Hayakawa, A. Hollnagel, K. Ishiguro, A. Iuliano, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, F. Laudisio, A. Lauria, A. Longhin, P. Loverre, A. Malgin, M. Malenica, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, S. Mikado, M. Miyanishi, F. Mizutani, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, K. Niwa, N. Okateva, S. Ogawa, K. Ozaki, A. Paoloni, L. Paparella, B. D. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, T. Roganova, H. Rokujo, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakirianova, T. Shchedrina, H. Shibuya, E. Shibayama, T. Shiraishi, S. Simone, C. Sirignano, G. Sirri, A. Sotnikov, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Vasina, P. Vilain, E. Voevodina, L. Votano, J. L. Vuilleumier, G. Wilquet, and C. S. Yoon

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract An event topology with two secondary vertices compatible with the decay of short-lived particles was found in the analysis of neutrino interactions in the OPERA target. The observed topology is compatible with tau neutrino charged current (CC) interactions with charm production and neutrino neutral current (NC) interactions with $$c\overline{c}$$ cc¯ pair production. However, other processes can mimic this topology. A dedicated analysis was implemented to identify the underlying process. A Monte Carlo simulation was developed and complementary procedures were introduced in the kinematic reconstruction. A multivariate analysis technique was used to achieve an optimal separation of signal from background. Most likely, this event is a $$\nu _{\tau }$$ ντ CC interaction with charm production, the tau and charm particle decaying into 1 prong and 2 prongs, respectively. The significance of this observation is evaluated.

Published
2020
Full Text
View/download PDF

93. A two-step surgery and a multidisciplinary approach in a centenarian patient with an acute presentation of right colon cancer

Author

Chiara Giannotti, Andrea Massobrio, Daniela Cannata, Alessio Nencioni, Fiammetta Monacelli, Alessandra Aprile, Domenico Soriero, Stefano Scabini, and Davide Pertile

Subjects
Colon cancer, Surgery, Cecostomy, Oldest old, Frailty, Comprehensive geriatric assessment, RD1-811
Abstract

Abstract Background As surgery remains the cornerstone of colorectal cancer (CRC) treatment, the number of older patients presented for colorectal resection is rapidly increasing. Nevertheless, the choice to operate an oldest-old patient still remain challenging and requires a careful assessment of risk to benefit ratio in order to guarantee appropriate surgical strategies and perioperative management. Case presentation A centenarian patient, acutely admitted to the emergency department, was diagnosed with an ileus caused by stenosing ascending colon cancer with abnormal distension of the right colon at high risk of perforation. Facing with this complex clinical scenario, a lateral decompressive cecostomy as alternative surgical procedure, was performed in local anesthesia in order to avoid the stressful event of an emergency surgery. Thereafter, the patient was admitted to the surgical ward and followed by a geriatrician who performed a comprehensive geriatric assessment (CGA) and daily clinical evaluations. This integrated plan of care was mainly focused on rehabilitation, nutritional interventions and therapeutic reconciliation, maximizing patient’s clinical conditions and performance status. Then, the second surgical step, the radical colon surgery with curative intent and bowel continuity reestablishment was performed, demonstrating to be feasible and safety also in a very advanced age patient in term of prolonged survival and preservation of an adequate quality of life. Conclusions This is the first case-report that illustrates a successful two step surgery for CRC in a centenarian patient thanks to a multidisciplinary based approach, overwhelming the mere concept of chronological age.

Published
2020
Full Text
View/download PDF

94. SIRT6 enhances oxidative phosphorylation in breast cancer and promotes mammary tumorigenesis in mice

Author

Becherini, Pamela, Caffa, Irene, Piacente, Francesco, Damonte, Patrizia, Vellone, Valerio G., Passalacqua, Mario, Benzi, Andrea, Bonfiglio, Tommaso, Reverberi, Daniele, Khalifa, Amr, Ghanem, Moustafa, Guijarro, Ana, Tagliafico, Luca, Sucameli, Marzia, Persia, Angelica, Monacelli, Fiammetta, Cea, Michele, Bruzzone, Santina, Ravera, Silvia, and Nencioni, Alessio

Published
2021
Full Text
View/download PDF

96. OPERA tau neutrino charged current interactions

Author

Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D’Ambrosio, N., De Lellis, G., De Serio, M., del Amo Sanchez, P., Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gorbunov, S., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovčić, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Kliček, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Lavasa, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Ogawa, S., Okateva, N., Ozaki, K., Paoloni, A., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Shakirianova, I., Schembri, A., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Šimko, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipčević, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tsanaktsidis, I., Tufanli, S., Ustyuzhanin, A., Vasina, S., Vidal García, M., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., and Yoon, C. S.

Published
2021
Full Text
View/download PDF

97. Fasting-mimicking diet and hormone therapy induce breast cancer regression

Author

Caffa, Irene, Spagnolo, Vanessa, Vernieri, Claudio, Valdemarin, Francesca, Becherini, Pamela, Wei, Min, Brandhorst, Sebastian, Zucal, Chiara, Driehuis, Else, Ferrando, Lorenzo, Piacente, Francesco, Tagliafico, Alberto, Cilli, Michele, Mastracci, Luca, Vellone, Valerio G., Piazza, Silvano, Cremonini, Anna Laura, Gradaschi, Raffaella, Mantero, Carolina, Passalacqua, Mario, Ballestrero, Alberto, Zoppoli, Gabriele, Cea, Michele, Arrighi, Annalisa, Odetti, Patrizio, Monacelli, Fiammetta, Salvadori, Giulia, Cortellino, Salvatore, Clevers, Hans, De Braud, Filippo, Sukkar, Samir G., Provenzani, Alessandro, Longo, Valter D., and Nencioni, Alessio

Published
2020
Full Text
View/download PDF

100. New results on $\nu_\mu \to \nu_\tau$ appearance with the OPERA experiment in the CNGS beam

Author

OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Asada, T., Autiero, D., Badertscher, A., Dhahbi, A. Ben, Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Brunetti, G., Buettner, B., Buontempo, S., Chaussard, L., Chernyavskiy, M., Chiarella, V., Chukanov, A., Consiglio, L., D'Ambrosio, N., Sanchez, P. Del Amo, De Lellis, G., De Serio, M., Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Ebert, J., Ereditato, A., Favier, J., Ferber, T., Fini, R. A., Fukuda, T., Garfagnini, A., Giacomelli, G., Goellnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Grianti, F., Guler, A. M., Gustavino, C., Hagner, C., Hakamata, K., Hara, T., Hayakawa, T., Hierholzer, M., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Ishikawa, M., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Katsuragawa, T., Kawahara, H., Kawada, J., Kim, J. H., Kim, S. H., Kimura, M., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Marteau, J., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Migliozzi, P., Mikado, S., Minotti, A., Miyanishi, M., Miyashita, E., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B. D., Park, I. G., Pastore, A., Patrizii, L., Pennacchio, E., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pretzl, K., Pupilli, F., Rescigno, R., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Rostovtseva, I., Rubbia, A., Russo, A., Ryazhskaya, O., Sato, O., Sato, Y., Schembri, A., Schmidt-Parzefall, W., Shakiryanova, I., Schcedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strauss, T., Strolin, P., Suzuki, K., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tolun, P., Tufanli, S., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., Yoshida, J., Yoshimoto, M., Zaitsev, Y., Zemskova, S., and Zghiche, A.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The OPERA neutrino experiment is designed to perform the first observation of neutrino oscillations in direct appearance mode in the $\nu_\mu \to \nu_\tau$ channel, via the detection of the $\tau$-leptons created in charged current $\nu_\tau$ interactions. The detector, located in the underground Gran Sasso Laboratory, consists of an emulsion/lead target with an average mass of about 1.2 kt, complemented by electronic detectors. It is exposed to the CERN Neutrinos to Gran Sasso beam, with a baseline of 730 km and a mean energy of 17 GeV. The observation of the first $\nu_\tau$ candidate event and the analysis of the 2008-2009 neutrino sample have been reported in previous publications. This work describes substantial improvements in the analysis and in the evaluation of the detection efficiencies and backgrounds using new simulation tools. The analysis is extended to a sub-sample of 2010 and 2011 data, resulting from an electronic detector-based pre-selection, in which an additional $\nu_\tau$ candidate has been observed. The significance of the two events in terms of a $\nu_\mu \to \nu_\tau$ oscillation signal is of 2.40 $\sigma$., Comment: 33 pages, 12 figures, 5 tables. Prepared for submission to JHEP

Published
2013

Catalog

Books, media, physical & digital resources
See catalog results