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1. Recent results on Heavy-Ion induced reactions of interest for 0νββ decay

Author

P. Amador-Valenzuela, H. Garcia-Tecocoatzi, A. Foti, J. Kotila, Alessandro Spatafora, M. A. G. da Silveira, A. Hacisalihoglu, K. De Los Rios, Carlo Ferraresi, A. Pakou, O. Brunasso, Diana Carbone, N. N. Deshmukh, Luis Acosta, G. A. Souliotis, S. O. Solakci, J. R. B. Oliveira, J. Mas Ruiz, Salvatore Calabrese, Jacopo Ferretti, S. Brasolin, J. Lubian, L. La Fauci, G. A. Brischetto, P. Ries, Y. Kucuk, Mauricio Moralles, Akın Yıldırım, Manuela Cavallaro, L. Serbina, G.V. Russo, S. Burrello, J. A. Lay, R. Chen, J. L. Ferreira, Roelof Bijker, R. B. B. Santos, Federico Pinna, Ismail Boztosun, Giuseppe Gallo, D. R. Mendes, Lorenzo Neri, D. J. Marín-Lámbarri, J. Barea, Y.Y. Yang, Daniela Calvo, Luciano Pandola, Maria Colonna, Paolo Mereu, Felice Iazzi, Nilberto H. Medina, Grazia D'Agostino, D. Lo Presti, R. I. M. Vsevolodovna, F. La Via, Franck Delaunay, C. Agodi, V. Capirossi, H. Djapo, O. Sgouros, S. Reito, M.R.D. Rodrigues, J. I. Bellone, Thereza Borello-Lewin, Horst Lenske, V. Soukeras, Luciano Calabretta, I. Ciraldo, A. D. Russo, G. Lanzalone, L. E. Charon Garcia, H. Vargas Hernandez, Norbert Pietralla, Paolo Finocchiaro, Elena Santopinto, V. Branchina, V. Werner, D. Torresi, S. Firat, A. Huerta-Hernandez, Maria Fisichella, S. Tudisco, J.S. Wang, H. Petrascu, J. Ma, Naftali Auerbach, Roberto Linares, Francesco Cappuzzello, E. R. Chávez Lomelí, Danilo Bonanno, C. Altana, G. De Geronimo, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), NUMEN, and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
History, measurement methods, nuclear matrix elements, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], heavy-ion induced Double Charge Exchange, neutrinoless double beta decay, 01 natural sciences, Education, Nuclear physics, oxygen: nuclide, double-beta decay: (0neutrino), Double beta decay, 0103 physical sciences, Beta (velocity), neutrino: mass, 010306 general physics, Nuclear Experiment, Physics, nucleus: semileptonic decay, Measurement method, operator: transition, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, particle: Majorana, charge exchange, magnetic spectrometer, Beta decay, heavy ion, Computer Science Applications, neon: nuclide, Heavy ion, High Energy Physics::Experiment, Neutrino, Charge exchange
Abstract

An updated overview of recent results on Heavy-Ion induced reactions of interest for neutrinoless double beta decay is reported in the framework of the NUMEN project. The NUMEN idea is to study heavy-ion induced Double Charge Exchange (DCE) reactions with the aim to get information on the nuclear matrix elements for neutrinoless double beta (0νββ) decay. Moreover, to infer the neutrino average masses from the possible measurement of the half- life of 0νββ decay, the knowledge of the nuclear matrix elements is a crucial aspect. Uma visão geral atualizada dos resultados recentes sobre reações induzidas por íons pesados ​​de interesse para o decaimento beta duplo sem neutrinos é relatada na estrutura do projeto NUMEN. A ideia do NUMEN é estudar reações de Double Charge Exchange (DCE) induzidas por íons pesados ​​com o objetivo de obter informações sobre os elementos da matriz nuclear para o decaimento beta duplo sem neutrinos (0νββ). Além disso, para inferir as massas médias dos neutrinos a partir da possível medição da meia-vida do decaimento 0νββ, o conhecimento dos elementos da matriz nuclear é um aspecto crucial. 1308 012002

Published
2019
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2. New Results from the NUMEN Project

Author

Daniela Calvo, Maria Colonna, G. A. Brischetto, Y. Kucuk, S. Brasolin, H. Garcia-Tecocoatzi, D. R. Mendes, S. O. Solakci, P. Ries, Francesco Cappuzzello, E. R. Chávez Lomelí, P. Amador-Valenzuela, Elena Santopinto, Ismail Boztosun, D. J. Marín-Lámbarri, Luciano Pandola, Lorenzo Neri, M. A. G. da Silveira, S. Firat, A. Hacisalihoglu, K. De Los Rios, J. Barea, Nilberto H. Medina, S. Reito, Diana Carbone, A. Foti, J. Kotila, Carlo Ferraresi, I. Ciraldo, Y.Y. Yang, Grazia D'Agostino, D. Lo Presti, S. Tudisco, A. Pakou, Luis Acosta, A. D. Russo, Naftali Auerbach, V. Soukeras, H. Djapo, C. Altana, Mauricio Moralles, N. N. Deshmukh, M.R.D. Rodrigues, J. I. Bellone, V. A. B. Zagatto, Thereza Borello-Lewin, Paolo Finocchiaro, J. Mas Ruiz, Salvatore Calabrese, Felice Iazzi, G.V. Russo, C. Agodi, Roelof Bijker, O. Sgouros, Luciano Calabretta, G. De Geronimo, F. La Via, Franck Delaunay, Jacopo Ferretti, J.S. Wang, Horst Lenske, Alessandro Spatafora, V. Capirossi, Paolo Mereu, J. A. Lay, R. Chen, R. I. M. Vsevolodovna, V. Werner, H. Petrascu, J. Ma, O. Brunasso, G. A. Souliotis, Roberto Linares, Danilo Bonanno, J. R. B. Oliveira, J. L. Ferreira, Giuseppe Gallo, H. Vargas Hernandez, Norbert Pietralla, Akın Yıldırım, G. Lanzalone, L. E. Charon Garcia, L. Serbina, V. Branchina, R. B. B. Santos, Federico Pinna, D. Torresi, A. Huerta-Hernandez, S. Burrello, L. La Fauci, Maria Fisichella, Manuela Cavallaro, J. Lubian, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and NUMEN

Subjects
Semileptonic decay, heavy ion: scattering, Cyclotron, Context (language use), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, law.invention, Nuclear physics, double-beta decay: (0neutrino), law, Double beta decay, 0103 physical sciences, cyclotron, 010306 general physics, Physics, nucleus: semileptonic decay, Spectrometer, 010308 nuclear & particles physics, resolution, cross section: measured, magnetic spectrometer, charge exchange, Upgrade, upgrade, Neutrino, Order of magnitude, experimental results
Abstract

International audience; NUMEN aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0νββ), by high-accuracy measurements of the cross sections of Heavy Ion (HI) induced Double Charge Exchange (DCE) reactions. First evidence about the possibility to get quantitative information about NME from experiments is found for the (^18O,^18Ne) and (^20Ne,^20O) reactions. Moreover, to infer the neutrino average masses from the possible measurement of the half-life of 0νββ decay, the knowledge of the NME is a crucial aspect. The key tools for this project are the high resolution Superconducting Cyclotron beams and the MAGNEX magnetic spectrometer at INFN Laboratori Nazionali del Sud in Catania (Italy). The measured cross sections are extremely low, limiting the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. A major upgrade of the LNS facility is foreseen in order to increase the experimental yield of at least two orders of magnitude, thus making feasible a systematic study of all the cases of interest.

Published
2018
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3. The NUMEN project @ LNS: Status and perspectives

Author

Riccardo Introzzi, Roelof Bijker, Andrea Lavagno, A. D. Russo, L. Acosta, Richard Wheadon, G. V. Russo, G. A. Souliotis, D. R. Mendes, Naftali Auerbach, Maria Fisichella, Fabio Longhitano, M.R.D. Rodrigues, Elena Santopinto, Felice Iazzi, R. I. M. Vsevolodovna, F. La Via, Franck Delaunay, J. I. Bellone, Thereza Borello-Lewin, H. Petrascu, P. N. de Faria, J. Lubian, Daniela Calvo, S. Reito, Maria Colonna, Vincenzo Greco, V. Soukeras, Grazia D'Agostino, Alessandro Spatafora, A. Hacisalihoglu, Diana Carbone, M.P. Bussa, Luciano Calabretta, A. Foti, J. Kotila, J. R. B. Oliveira, Ismail Boztosun, Carlo Ferraresi, Paolo Finocchiaro, D. Torresi, Francesco Cappuzzello, E. R. Chávez Lomelí, Salvatore Calabrese, A. Pakou, A. Calanna, H. Lenske, O. Sgouros, U. Garcia, V. A. B. Zagatto, V. Branchina, Grazia Litrico, A. Yildirin, Giuseppe Gallo, Salvatore Tudisco, Luciano Pandola, Nilberto H. Medina, D. Lo Presti, G. Santagati, J. A. Lay, D. Bongiovanni, Danilo Rifuggiato, Giuseppe Giraudo, N. N. Deshmukh, Abdullah Coban, Manuela Cavallaro, J. L. Ferreira, C. Agodi, Federico Pinna, S. O. Solakci, G. Lanzalone, Roberto Linares, Danilo Bonanno, Annamaria Muoio, G. Degeronimo, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Civitarese, Osvaldo, Stekl, Ivan, and Suhonen, Jouni

Subjects
spectroscopy, accelerator, spektroskopia, Cyclotron, nucleus: energy, Context (language use), Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, law.invention, Nuclear physics, Physics and Astronomy (all), double-beta decay: (0neutrino), law, Double beta decay, 0103 physical sciences, cyclotron, 010306 general physics, Physics, Spectrometer, ta114, operator: transition, 010308 nuclear & particles physics, cyclotrons nuclear structure, Nuclear structure, radioactive decay, semileptonic decay, cross section: measured, magnetic spectrometer, charge exchange, charge exchange reactions, heavy ion, Upgrade, Order of magnitude, experimental results
Abstract

The NUMEN project aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0νββ), by high-accuracy measurements of Heavy Ion (HI) induced Double Charge Exchange (DCE) reaction cross sections. In particular, the (18O,18Ne) and (20Ne,20O) reactions are used as tools for β+β+ and β−β− decays, respectively. In the experiments, performed at INFN - Laboratory Nazionali del Sud (LNS) in Catania, the beams are accelerated by the Superconducting Cyclotron (CS) and the reaction ejectiles are detected the MAGNEX magnetic spectrometer. The measured cross sections are challengingly low (a few nb), being the total reaction cross section much larger (a few b), thus a high sensitivity and a large rejection capability are demanded to the experimental set-up. This limits the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. A major upgrade of the LNS facility is foreseen in order to increase the experimental yield of at least two orders of magnitude, still keeping the high sensitivity of the present set-up, making it feasible a systematic study of all the cases of interest. Frontiers technologies are going to be developed, to this purpose, for the accelerator and the detection systems. In parallel, advanced theoretical models are being developed in order to extract the nuclear structure information from the measured cross sections.

Published
2017
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4. Measuring nuclear reaction cross sections to extract information on neutrinoless double beta decay

Author

J. Lubian, R. J. Wheadon, D. Torresi, Luciano Pandola, J. L. Ferreira, Paolo Finocchiaro, Federico Pinna, Salvatore Calabrese, Annamaria Muoio, Nilberto H. Medina, Giuseppe Gallo, A. Calanna, D. Bongiovanni, G. Lanzalone, Daniela Calvo, G. De Geronimo, G.V. Russo, A. Yildirin, O. Sgouros, D. Lo Presti, Thereza Borello-Lewin, G. Giraudo, V. Branchina, Horst Lenske, Maria Colonna, S. Reito, V. Soukeras, P. N. de Faria, Vincenzo Greco, Elena Santopinto, U. Garcia, Felice Iazzi, G. Litrico, S. O. Solakci, Diana Carbone, R.I.M. Vsevolodovna, V. A. B. Zagatto, Naftali Auerbach, A. Hacisalihoglu, G. A. Souliotis, Ismail Boztosun, L. Acosta, F. La Via, J. R. B. Oliveira, Grazia D'Agostino, Franck Delaunay, Andrea Lavagno, Francesco Cappuzzello, E. R. Chávez Lomelí, Roberto Linares, A. Pakou, Danilo Bonanno, Luciano Calabretta, Fabio Longhitano, M. Fisichella, Salvatore Tudisco, Alessandro Spatafora, A. D. Russo, H. Petrascu, A. Foti, Carlo Ferraresi, G. Santagati, J. A. Lay, Danilo Rifuggiato, M. R. D. Rodrigues, N. N. Deshmukh, Maria Pia Bussa, D. R. Mendes, C. Agodi, Jenni Kotila, Riccardo Introzzi, Roelof Bijker, Jessica I. Bellone, Abdullah Coban, Manuela Cavallaro, Gargano, Angela, Coraggio, Luigi, Itaco, Nunzio, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
double-beta decay: neutrinoless, Nuclear reaction, History, Particle physics, double beta decay, FOS: Physical sciences, nucleus: structure function, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nuclear reaction, 7. Clean energy, 01 natural sciences, QUADRUPOLE MAGNETS, Education, Standard Model, nucleus: production, Physics and Astronomy (all), mass: scale, ydinreaktiot, FIELD MEASUREMENT, double-beta decay: (0neutrino), Double beta decay, 0103 physical sciences, Grand Unified Theory, structure, neutrino: mass, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, DETECTOR, Physics, operator: transition, 010308 nuclear & particles physics, particle: Majorana, Order (ring theory), semileptonic decay, charge exchange, antiparticle, Computer Science Applications, MAGNEX SPECTROMETER, Automatic Keywords, MAJORANA, grand unified theory, MAGNEX SPECTROMETER, QUADRUPOLE MAGNETS, FIELD MEASUREMENT, DETECTOR, upgrade, High Energy Physics::Experiment, Production (computer science), Neutrino
Abstract

Neutrinoless double beta decay (0v\b{eta}\b{eta}) is considered the best potential resource to access the absolute neutrino mass scale. Moreover, if observed, it will signal that neutrinos are their own anti-particles (Majorana particles). Presently, this physics case is one of the most important research "beyond Standard Model" and might guide the way towards a Grand Unified Theory of fundamental interactions. Since the 0v\b{eta}\b{eta} decay process involves nuclei, its analysis necessarily implies nuclear structure issues. In the NURE project, supported by a Starting Grant of the European Research Council (ERC), nuclear reactions of double charge-exchange (DCE) are used as a tool to extract information on the 0v\b{eta}\b{eta} Nuclear Matrix Elements. In DCE reactions and \b{eta}\b{eta} decay indeed the initial and final nuclear states are the same and the transition operators have similar structure. Thus the measurement of the DCE absolute cross-sections can give crucial information on \b{eta}\b{eta} matrix elements. In a wider view, the NUMEN international collaboration plans a major upgrade of the INFN-LNS facilities in the next years in order to increase the experimental production of nuclei of at least two orders of magnitude, thus making feasible a systematic study of all the cases of interest as candidates for 0v\b{eta}\b{eta}.

Published
2018
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5. NURE: An ERC project to study nuclear reactions for neutrinoless double beta decay

Author

J. L. Ferreira, Diana Carbone, Paolo Finocchiaro, Salvo Tudisco, J. I. Bellone, V. Soukeras, Thereza Borello-Lewin, O. Sgouros, Horst Lenske, V. A. B. Zagatto, A. Hacisalihoglu, Annamaria Muoio, Pedro Neto De Faria, Salvatore Calabrese, D. Bongiovanni, Josè A. Lay, Naftali Auerbach, Stefano Bianco, José R. B. Oliveira, G. A. Souliotis, Russo G, A. Pakou, Francesco La Via, Federico Pinna, V. Branchina, Andrea Lavagno, D. R. Mendes, A. Foti, Grazia Litrico, Giuseppe Giraudo, F. Pirri, H. Petrascu, Vincenzo Greco, Giuseppe Gallo, Carlo Ferraresi, Jenni Kotila, Luigi Busso, Manuela Cavallaro, G. Santagati, Maria Pia Colonna, A. Calanna, L. Acosta, Ismail Boztosun, C. Agodi, Danilo Rifuggiato, Domenico Lo Presti, Nikit Dehsmukh, S. O. Solakci, J. Lubian, H. Garcia-Tecocoatzi, M. R. D. Rodrigues, Fabio Longhitano, R. I. M. Vsevolodovna, Roelof Bijker, Maria Pia Bussa, S. Reito, Esra Aciksoz, Daniela Calvo, Riccardo Introzzzi, Efrain R. Chávez Lomelí, Grazia D'Agostino, Elena Santopinto, Felice Iazzi, Francesco Cappuzzello, Luciano Pandola, Roberto Linares, Danilo Bonanno, Nilberto H. Medina, Maria Fisichella, A. D. Russo, Luciano Calabretta, Richard Wheadon, G. Lanzalone, and D. Torresi

Subjects
Semileptonic decay, Nuclear reaction, Physics, Particle physics, Nuclear structure, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, Lepton number, Standard Model, ydinreaktiot, Double beta decay, 0103 physical sciences, Grand Unified Theory, Nuclear Physics and astrophysics, High Energy Physics::Experiment, Neutrino, Nuclear Experiment (nucl-ex), 010306 general physics, ydinfysiikka, Nuclear Experiment, 010303 astronomy & astrophysics
Abstract

Neutrinoless double beta decay (0{\nu}\b{eta}\b{eta}) is considered the best potential resource to determine the absolute neutrino mass scale. Moreover, if observed, it will signal that the total lepton number is not conserved and neutrinos are their own anti-particles. Presently, this physics case is one of the most important research beyond Standard Model and might guide the way towards a Grand Unified Theory of fundamental interactions. Since the \b{eta}\b{eta} decay process involves nuclei, its analysis necessarily implies nuclear structure issues. The 0{\nu}\b{eta}\b{eta} decay rate can be expressed as a product of independent factors: the phase-space factors, the nuclear matrix elements (NME) and a function of the masses of the neutrino species. Thus the knowledge of the NME can give information on the neutrino mass scale, if the 0{\nu}\b{eta}\b{eta} decay rate is measured. In the NURE project, supported by a Starting Grant of the European Research Council, nuclear reactions of double charge-exchange (DCE) will be used as a tool to extract information on the \b{eta}\b{eta} NME. In DCE reactions and \b{eta}\b{eta} decay, the initial and final nuclear states are the same and the transition operators have similar structure. Thus the measurement of the DCE absolute crosssections can give crucial information on \b{eta}\b{eta} matrix elements., Comment: arXiv admin note: substantial text overlap with arXiv:2001.09657; text overlap with arXiv:2001.09648

6. Recent results on heavy-ion induced reactions of interest for neutrinoless double beta decay at INFN-LNS

Author

Felice Iazzi, H. Petrascu, Giuseppe Gallo, C. Agodi, Marcilei A. G. Silveira, Franck Delaunay, Manuela Cavallaro, O. Brunasso, A. Hacisalihoglu, K. De Los Rios, H. Garcia-Tecocoatzi, Laura La Fauci, Luis Garcia, Hesiquio Vargas Hernandez, Yan Yun Yang, G. A. Brischetto, Y. Kucuk, Russo G, A. Pakou, Naftali Auerbach, Paolo Finocchiaro, S. Firat, Maria Fisichella, M. R. D. Rodrigues, Jan Song Wang, V. Capirossi, I. Ciraldo, J. L. Ferreira, S. O. Solakci, Alessandro Spatafora, N. N. Deshmukh, S. Reito, Francesco La Via, D. J. Marín-Lámbarri, A. D. Russo, J. Barea, Mauricio Moralles, G. A. Souliotis, Norbert Pietralla, O. Sgouros, Gianluigi De Geronimo, C. Altana, A. Foti, H. Djapo, J. Lubian, Carlo Ferraresi, Junbing Ma, Elena Santopinto, Horst Lenske, V. Werner, A. Yildirin, V. Branchina, V. A. B. Zagatto, V. Soukeras, S. Brasolin, J. I. Bellone, P. Ries, Arcadio Huerta-Hernandez, Efrain R. Chávez Lomelí, D. Torresi, Thereza Borello-Lewin, Francesco Cappuzzello, R. B. B. Santos, Luciano Calabretta, Salvatore Tudisco, R. I. M. Vsevolodovna, S. Burrello, Federico Pinna, L. Acosta, Ismail Boztosun, Roelof Bijker, Lorenzo Neri, F. Ameil, Paolo Mereu, Diana Carbone, Daniela Calvo, Maria Colonna, D. R. Mendes, J. Mas Ruiz, Salvatore Calabrese, Ruofu Chen, Jenni Kotila, Domenico Lo Prest, Luciano Pandola, Nilberto H. Medina, G. Lanzalone, Leonardo Serbina, Roberto Linares, Danilo Bonanno, P. Amador-Valenzuela, José R. B. Oliveira, Jacopo Ferretti, J. A. Lay, Grazia D'Agostino, de Angelis, G., Corradi, L., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), NUMEN, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
History, experimental methods, heavy ion: scattering, QC1-999, heavy ion: charge exchange, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], hiukkasfysiikka, 7. Clean energy, 01 natural sciences, Education, Nuclear physics, double-beta decay: (0neutrino), Double beta decay, 0103 physical sciences, neutrino: mass, 010306 general physics, nucleus: semileptonic decay, Physics, 010308 nuclear & particles physics, particle: Majorana, Nuclear structure, cross section: measured, Special class, magnetic spectrometer, charge exchange, detector: upgrade, neon: nuclide, Computer Science Applications, heavy ion induced double charge exchange reactions, neutrino: Majorana, Heavy ion, energy resolution: high, ydinfysiikka, Charge exchange, experimental results
Abstract

The NUMEN project aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0νββ). In this view measurements of Heavy Ion (HI) induced Double Charge Exchange (DCE) reaction cross sections are performed with high-accuracy. In particular, the (18O,18Ne) and (20Ne,20O) reactions are used as tools for β+β+ and β-β- decays, respectively. In the experiments, performed at INFN - Laboratory Nazionali del Sud (LNS) in Catania, the beams are accelerated by the Superconducting Cyclotron (CS) and the reaction ejectiles are detected the MAGNEX magnetic spectrometer. The measured cross sections are challengingly low (a few nb), being the total reaction cross section much larger (a few b), thus a high sensitivity and a large rejection capability are demanded to the experimental set-up. This limits the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. A major upgrade of the LNS facility is under way in order to increase the experimental dataset of more than two orders of magnitude, still preserving the high sensitivity of the present set-up. When accomplished this effort will make the INFN-LNS as the state-of-the-art research infrastructure for the systematic study of all the cases of interest for 0νββ. In this view, frontiers technologies are going to be adopted for the accelerator and the detection systems. In parallel, advanced theoretical models are being developed in order to extract the nuclear structure information from the measured cross sections.

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