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1. Bosentan fosters microvascular de-remodelling in systemic sclerosis

Author: G. Carnesecchi, Cosimo Bruni, Serena Guiducci, Florenzo Iannone, S. Bellando Randone, A Maresta, M. Matucci Cerinic, and Giovanni Lapadula
Subjects: Adult, Male, medicine.medical_specialty, Angiogenesis, Nailfold videocapillaroscopy, Scleroderma, Microscopic Angioscopy, Young Adult, Rheumatology, Internal medicine, Humans, Medicine, skin and connective tissue diseases, Antihypertensive Agents, Aged, Sulfonamides, Scleroderma, Systemic, integumentary system, business.industry, Endothelin receptor antagonist, Bosentan, General Medicine, Middle Aged, medicine.disease, Capillaries, respiratory tract diseases, Surgery, Treatment Outcome, Blood pressure, Nails, Microvessels, Cardiology, Female, business, Iloprost, medicine.drug
Abstract: Bosentan, a dual endothelin receptor antagonist, may reduce blood pressure by blocking the vasoconstrictor effect of endothelin-1. In systemic sclerosis (SSc) nailfold videocapillaroscopy (NVC); allows diagnostic and follow-up of microvascular damage. Distinct NVC patterns have been identified for the evaluation of severity of SSc microvascular damage. The objective of this study is to evaluate the modification of the microvasculature under Bosentan therapy in SSc patients with pulmonary arterial hypertension (PAH). Nine patients with PAH related to SSc in New York Heart Association classes III-IV were treated with Bosentan 125 mg twice a day. NVC optical probe videocapillaroscopy equipped with 100× and 200× contact lenses and connected to image analyse software was performed before and after 12 months of Bosentan therapy to evaluate the modification of microvasculature. Nine PAH SSc patients treated with Iloprost were used as controls. Before Bosentan therapy, seven patients showed at NVC severe loss of capillaries with large avascular areas and vascular architectural disorganisation which are typically "late" SSc pattern. After 12 months of Bosentan, NVC pattern changed in seven patients from "late" into "active" SSc pattern. The disappearance of avascular areas and capillary haemorrhages was the most striking result. Two patients had an "active" SSc pattern, not modified by Bosentan treatment. These data show that Bosentan may improve NVC pattern in SSC and the presence of new capillaries suggests that it may favour angiogenesis. Bosentan may improve and stabilise the microvasculature in long-term treatment modulating the structural modifications detected by NVC.
Published: 2012
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2. Evidence for oesophageal and anorectal involvement in very early systemic sclerosis (VEDOSS): report from a single VEDOSS/EUSTAR centre

Author: Silvia Bellando-Randone, Matucci-Cerinic Marco, I. Giani, A. Radicati, Gemma Lepri, Filippo Pucciani, Cosimo Bruni, Jelena Blagojevic, G. Carnesecchi, and Serena Guiducci
Subjects: Adult, Lung Diseases, Male, medicine.medical_specialty, Oesophageal manometry, Manometry, Immunology, Anal Canal, Esophageal Diseases, Gastroenterology, General Biochemistry, Genetics and Molecular Biology, Esophageal Sphincter, Lower, Pulmonary function testing, Microscopic Angioscopy, Rheumatology, Internal medicine, Pulmonary fibrosis, medicine, Immunology and Allergy, Humans, In patient, Lung, Anus Diseases, Scleroderma, Systemic, business.industry, Anorectal manometry, Oesophageal peristalsis, Raynaud Disease, Middle Aged, medicine.disease, Connective tissue disease, Respiratory Function Tests, Radiography, Early Diagnosis, Rectal Diseases, Female, business, Abnormal peristalsis
Abstract: BackgroundThe oesophagus is the first gastrointestinal (GI) tract involved in systemic sclerosis (SSc), followed by the anorectum.ObjectiveEvaluation of oesophageal and anorectal involvement and their correlations in patients with very early diagnosis of SSc (VEDOSS).Patients and methods59 patients with VEDOSS, evaluated with oesophageal and anorectal manometry and investigated with lung function tests and chest HRCT. Demographic data, oesophageal and anorectal symptoms, Raynaud's phenomenon, autoantibodies, videocapillaroscopy patterns, puffy fingers and digital ulcers were recorded for all patients.ResultsIn 4 patients oesophageal manometry and in 17 patients anorectal manometry was not performed because of scarce tolerance. Oesophageal peristalsis was absent in 14 patients; its pressure and speed were significantly lower in 41 patients (p80% showed only an abnormal peristalsis (ConclusionsIn patients with VEDOSS, oesophageal and anorectal disorders are frequently detected, showing that very early SSc is characterised by GI involvement.
Published: 2013

3. Lung ultrasound for the screening of interstitial lung disease in very early systemic sclerosis

Author: Cosimo Bruni, Luna Gargani, Alberto Moggi Pignone, Silvia Bellando Randone, Davide Caramella, G. Carnesecchi, Maria Letizia Conforti, Eugenio Picano, Serena Guiducci, Tatiana Barskova, Marco Matucci Cerinic, and Francesco Porta
Subjects: Male, medicine.medical_specialty, Immunology, Population, behavioral disciplines and activities, General Biochemistry, Genetics and Molecular Biology, Scleroderma, Rheumatology, Epidemiology, medicine, Immunology and Allergy, Humans, skin and connective tissue diseases, education, Ultrasonography, education.field_of_study, Lung, Scleroderma, Systemic, integumentary system, business.industry, Ultrasound, Interstitial lung disease, respiratory system, Middle Aged, medicine.disease, Connective tissue disease, respiratory tract diseases, Lung ultrasound, medicine.anatomical_structure, Early Diagnosis, Female, Radiology, business, Lung Diseases, Interstitial
Abstract: A high percentage of patients with systemic sclerosis (SSc) develop interstitial lung disease (ILD) during the course of the disease. Promising data have recently shown that lung ultrasound (LUS) is able to detect ILD by the evaluation of B-lines (previously called ultrasound lung comets), the sonographic marker of pulmonary interstitial syndrome.To evaluate whether LUS is reliable in the screening of ILD in patients with SSc.Fifty-eight consecutive patients with SSc (54 women, mean age 51±14 years) who underwent a high resolution CT (HRCT) scan of the chest were also evaluated by LUS for detection of B-lines. Of these, 32 patients (29 women, mean age 51±15 years) fulfilled the criteria for a diagnosis of very early SSc.At HRCT, ILD was detected in 88% of the SSc population and in 41% of the very early SSc population. A significant difference in the number of B-lines was found in patients with and without ILD on HRCT (57±53 vs 9±9; p0.0001), with a concordance rate of 83%. All discordant cases were false positive at LUS, providing a sensitivity and negative predictive value of 100% in both SSc and very early SSc.ILD may be detected in patients with very early SSc. The presence of B-lines at LUS examination correlates with ILD at HRCT. LUS is very sensitive for detecting ILD even in patients with a diagnosis of very early SSc. The use of LUS as a screening tool for ILD may be feasible to guide further investigation with HRCT.
Published: 2012

4. Fetal programming and systemic sclerosis

Author: Luca Filippi, Salvatore De Masi, Mariarosaria Di Tommaso, Roberto Caporali, G. Carnesecchi, Armando Gabrielli, Guido Valesini, Kathleen S. McGreevy, Marco Matucci Cerinic, Valeria Riccieri, Veronica Codullo, Carolina Amador, Roberta Bagnati, and Gianpaolo Donzelli
Subjects: Male, Pediatrics, medicine.medical_specialty, Multivariate analysis, Birth weight, autoimmune disease, Pregnancy, Risk Factors, medicine, Birth Weight, Humans, scleroderma, Age of Onset, Univariate analysis, Scleroderma, Systemic, epigenetics, Fetal programming, birthweight, Obstetrics, business.industry, Infant, Newborn, Case-control study, Obstetrics and Gynecology, Infant, Low Birth Weight, Middle Aged, medicine.disease, Confidence interval, fetal programming, Italy, Case-Control Studies, Infant, Small for Gestational Age, Multivariate Analysis, Small for gestational age, Female, Age of onset, business, Maternal Age
Abstract: This study investigated whether birthweight is linked to an increased risk of the development of systemic sclerosis.This was a multicenter case-control study with perinatal data that were obtained from 332 cases with systemic sclerosis and 243 control subjects. Birthweight was treated as a dichotomous variable (2500 g vs ≥2500 g); low birthweight was defined as a weight2500 g; small for gestational age was defined as birthweight10th percentile for gestational age adjusted for sex. The relationship between systemic sclerosis and both low birthweight and small for gestational age was expressed with the crude (univariate analysis) and adjusted (multivariate analysis) odds ratio (OR).Significantly increased ORs were observed in the univariate analysis for low birthweight (OR, 2.59; 95% confidence interval [CI], 1.39-5.05) and small for gestational age (OR, 2.60; 95% CI, 1.34-5.32) subjects. Similarly increased risks were confirmed for both conditions in the multivariate analysis (OR, 3.93; 95% CI, 1.92-8.07; and OR, 2.58; 95% CI, 1.28-5.19), respectively.Low birthweight and small for gestational age at birth are risk factors for the adult onset of systemic sclerosis.
Published: 2015
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5. PReS-FINAL-2315: Severe cutaneous vasculitis in two patients with juvenile idiopathic arthritis and biologic therapy

Author: M. Matucci Cerinic, G. Carnesecchi, Gemma Lepri, Federico Bertini, and Fernanda Falcini
Subjects: medicine.medical_specialty, Hidrosadenitis, Pathology, business.industry, Incidence (epidemiology), digestive, oral, and skin physiology, Arthritis, medicine.disease, Dermatology, Rheumatology, Psoriasis, Internal medicine, Pediatrics, Perinatology and Child Health, Poster Presentation, medicine, Juvenile, Immunology and Allergy, Pediatrics, Perinatology, and Child Health, business, Adverse effect, Uveitis
Abstract: The management of chronic inflammatory autoimmune diseases has been revolutioned by the use of novel biologic agents achieving excellent results in the treatment of Juvenile Idiopathic Arthritis (JIA). These drugs are generally well tolerated but as they are increasingly used, the incidence of adverse reaction is more common. The most frequent are localised at the injection's site; others include: pustular folliculitis, psoriasis, hydradenitis, Sweet's syndrome, lupus-like reactions, and palm plantar pustolosis. Cutaneous vasculitis related to TNF-alpha antagonists, such as hypersensitivity and leucocytoclastic vasculitis, has been described as few case reports. Conversely, there are no reports of cutaneous vasculitis induced from other biologic agents. We report two cases of severe cutaneous vasculitis in adolescents with JIA and uveitis under biologic therapy.
Published: 2013

6. AB0231 Esophageal involvement in very early systemic sclerosis (SSC)

Author: G. Carnesecchi, Gemma Lepri, Cosimo Bruni, Jelena Blagojevic, G. Serena, S. Bellando Randone, Filippo Pucciani, I. Giani, A. Radicati, and M. Matucci Cerinic
Subjects: Gastrointestinal tract, medicine.medical_specialty, Anti-nuclear antibody, business.industry, Immunology, Autoantibody, Mean pressure, Esophageal Disorder, medicine.disease, Dysphagia, Gastroenterology, General Biochemistry, Genetics and Molecular Biology, Rheumatology, Internal medicine, medicine, GERD, Immunology and Allergy, medicine.symptom, business, Peristalsis
Abstract: Background SSc affects gastrointestinal tract in more than 80% of patients. Esophageal involvement is the most common manifestation with a prevalence ranging between 50 and 90%. Objectives Evaluation of esophageal involvement and detection of its predictor factors in very early SSc patients. Methods 56 patients (55 females), mean age 49,2±14 years, with very early SSc were evaluated with esophageal manometry. The demographic data, esophageal symptoms (dysphagia, typical GERD symptoms), Raynaud phenomenon (presence/absence, duration), autoantibody profile (anticentromere antibodies [ACA], antinuclear antibodies [ANA], anti-Scl70 antibodies [Scl70]), videocapillaroscopy patterns (Normal, Early, Active, Late), puffy fingers, digital ulcers were recorded for all patients. Results Esophageal body dysmotility (abnormal mean pressure of peristalsis or absence of peristalsis) was present in 49 patients (94,2%), and was associated with a hypotensive lower esophageal sphincter (LES) in 26 (53,1%). Esophageal symptoms were present in 26 patients (50%).Puffy fingers were present in 22 patients (42,3%) and were associated with a smaller area of LES ( p-value: 0.011) . In 4 patients esophageal manometry was not performed because of scarce tolerance of the procedure. Conclusions Esophageal disorders are frequently seen in very early SSc patients in particular in patients with puffy fingers. Disclosure of Interest None Declared
Published: 2013
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7. FRI0341 Temporomandibular joints (TMJ) involvement in juvenile idiopathic arthritis (JIA): Longitudinal evaluation after orthopaedic treatment

Author: M. Bosco, G. Carnesecchi, Fernanda Falcini, Susanna Cappelli, M. Matucci Cerinic, K. Biondi, and Daniela Melchiorre
Subjects: business.industry, Immunology, Dentistry, Arthritis, medicine.disease, General Biochemistry, Genetics and Molecular Biology, Condyle, Masticatory force, Masseter muscle, stomatognathic diseases, stomatognathic system, Rheumatology, Cohort, Occlusion, medicine, Immunology and Allergy, Young adult, business, Facial symmetry
Abstract: Background TMJ involvement has been largely observed in all subsets of patients with JIA. The reported prevalence of detectable X-ray changes varies from 30% to 63%. From 50 to 80% of JIA children, may have TMJ arthritis by MRI and by sonographic exam (SE) (effusions, synovial enhancement, condylar flattening and/or erosions, thickness of masseter muscle) before evidence of X-ray damage. TMJs injections with steroids or/and anti-TNF alpha blockers have been used at the first signs of inflammation. When joint damage is evident orthopaedic treatment (brace) may be helpful in preventing its further evolution. Objectives To evaluate the efficacy and safety of orthopaedic treatment in a cohort of JIA adolescents/young adults with TMJ arthritis. Methods Our study population included 90 JIA consecutive pts (66 F, 24 M, mean age 14,5.±4,4 yrs.), mean age at disease onset 6,9±5 yrs., mean disease duration at first orthodontic evaluation 7,7±5,2 yrs., all treated at Transition clinic of Rheumatology Department between January 2010 and December 2011. Out of 90 pts, 45 had oligoarticular, 32 polyarticular, 4 systemic, 9 enthesitis-related onset. The diagnosis of TMJ disease was performed on the presence of at least one Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) diagnosis. The anamnestic and functional data were collected in a medical record used by orthodontists of University of Pavia, Italy. 50.1% of the pts complained of recurrent pain localized in the temporomandibular area, crepitation, and jaw stiffness or fatigue. All TMJs were examined by panoramic X-ray, teleradiography with latero-lateral and antero-posterior view, and by SE with Esaote MyLAB 70 (Genoa Italy linear probe 8-13 MHz). At first orthodontic evaluation 80/90 pts showed dento-skeletal malocclusions leading to a Class II caused by skeletal retrognathia, post-mandibular rotation, lower height of the mandibular body and ramus that can determine asymmetry in the frontal and/or in the sagittal plane. Fifty five out of 90 pts (61.1%) received orthopaedic treatment with an activator to help mandibular growth, followed by the use of a bite. Twenty five/90 pts (28%) have worn a bite without previous orthopaedic therapy, 10 pts (11.1%) refused treatment. Results After two years from the first orthodontic evaluation 58 out 80 pts who underwent either orthopaedic therapy plus bite or bite alone (72.5%) showed an improvement in occlusion, masticatory function and cranio-facial morphology.In 75/80 pts (94%) the thickness of masseter muscle, detected by SE after treatment, was similar on left and right side (mean value 7.6 mm) at rest and after contraction (p Conclusions Our data confirm that in JIA patients, TMJs orthopaedic treatment may modify the severe and often intractable damage responsible of severe micrognathia, aberrations in mandibulofacial development, and facial asymmetry. TMJ orthopaedic treatment is recommended when local steroid/anti TNF alpha blockers injections are not indicated to block the bone damage. Disclosure of Interest None Declared
Published: 2013
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8. Investigation of two photon final states in e+e− annihilation at <√s⪢ = 34.2 GeV

Author: O. Hamon, G. Cozzika, G. Flügge, F. Pierre, Y. Ducros, D. Lüers, U. Mallik, M. Rivoal, P. Grosse-Wiesmann, G. London, V. Schröder, H. Müller, J. Bodenkamp, R. George, D. C. Fries, J. Engler, Peter Schacht, H. Küster, H. Randoll, U. Gümpel, F. Kovacs, G. Grindhammer, J. Haissinski, J. J. Veillet, U. Kruse, Luc Poggioli, A. Cordier, R. Aleksan, G. D'Agostini, W. D. Apel, H. Sindt, G. Hopp, K. Gamerdinger, R. Kotthaus, A. Klarsfeld, G. Schmidt, S. Banerjee, P. Colas, M. Davier, G. Carnesecchi, J. Bouchez, M. Goldberg, A. Gaidot, Horst Oberlack, Y. Lavagne, B. Grossetete, H. Schneider, F. Laplanche, H. J. Behrend, J. Pamela, Jean-Francois Grivaz, C. Kiesling, G. Buschhorn, Ch. Chen, H. Fenner, W. De Boer, J. P. Pansart, H. Lierl, J. H. Field, F. Kapusta, Daniel Fournier, B. Gunderson, M. J. Schachter, W. Fues, and V. Journé
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Missing energy, Photon, Annihilation, Two-photon excitation microscopy, Coupling strength, Cutoff, Particle, High Energy Physics::Experiment
Abstract: Two photon final states in e + e − annihilation have been analyzed at CM energies around 34 GeV. Good agreement with QED is observed. Lower limits for the QED cutoff parameters of Λ + > 59 GeV and Λ - > 44 GeV are determined. A search for two photons with missing energy yields an upper limit for the production of neutral particles which decay into a photon and a non-interacting particle. Constraints on the mass and the coupling strength of supersymmetric photinos are discussed.
Published: 1983
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9. New data on semihadronic decays of the τ lepton

Author: M. J. Schachter, J. Bouchez, O. Hamon, A. Cordier, G. Schmidt, R. George, Y. Lavagne, F. Laplanche, B. Forstbauer, W. D. Apel, F. Pierre, G. Grindhammer, Eduardo Ros, B. Grossetete, Jean-Francois Grivaz, P. Grosse-Wiesmann, J. Haissinski, H. Schneider, C. Kiesling, H. Fenner, U. Kruse, H. J. Behrend, M. Goldberg, Y. Ducros, U. Mallik, G. Hopp, F. Kovacs, H. Müller, Patrick Jarry, G. Cozzika, Peter Schacht, H. Küster, O. Achterberg, J. Pamela, J. J. Veillet, G. D'Agostini, G. Bonneaud, R. Aleksan, K. Gamerdinger, Th. Henkes, R. Kotthaus, P. Colas, H. Sindt, J. H. Field, Werner Wiedenmann, A. Gaidot, W. Fues, Horst Oberlack, V. Journé, G. Flügge, D. Lüers, V. Schröder, J. P. Pansart, J. Engler, M. Rivoal, M. Krüger, F. Kapusta, B. Gunderson, F. Le Diberder, G. Buschhorn, Daniel Fournier, R. Pain, Luc Poggioli, H. Lierl, G. Carnesecchi, G. London, D. C. Fries, H. Randoll, W. De Boer, and M. Davier
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), High Energy Physics::Lattice, Electron–positron annihilation, Nuclear Theory, Current algebra, Elementary particle, Nuclear physics, Particle acceleration, Pion, High Energy Physics::Experiment, Quantum field theory, Nuclear Experiment, Engineering (miscellaneous), Charged current, Lepton
Abstract: Branching ratios for the decay τ→ν+(n pions) withn≧2 are presented. The new data include all possible charge configurations of the pion system and, in particular, final states containing one or several neutral pions. The data are compared with predictions from CVC (even number of pions in final state) and current algebra (odd number of pions). They strongly support the standard coupling of the τ to the weak charged current.
Published: 1984
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10. Observation of an excess of ν e , ν e events in a beam dump experiment at 400 GeV

Author: G. Bonneaud, R. Arnold, G. Carnesecchi, J. Gillespie, W. Van Doninck, J.P. Vialle, C. Matteuzzi, T. W. Jones, Alberto Pullia, M. Willutzky, N. Armenise, P. Alibran, A. Blondel, C. Pascaud, O. Skjeggesta, J. H. Bartley, B. Degrange, J. Sleeman, P. Musset, M. Haguenauer, G. Conforto, S. Bonetti, A.M. Lutz, S. Nuzzo, U. Nguyen-Khac, Ph. Heusse, D. Bertrand, R. Blaes, O. Erriquez, M. Dewit, H. Burmeister, B. Pattison, J. Morfin, S. Natali, P. Petitjean, L. Welch, E. Fiorini, M. J. Price, T. Bolognese, M. Paty, H. Weerts, A. G. Frodesen, M. T. Muciaccia-Fogli, J. Sacton, Donatella Cavalli, F. Jacquet, M. Rollier, B. Escoubes, D. Blum, J. L. Rieter, J. Bourotte, F. W. Bullock, A. Rognebakke, E. Bellotti, F. Romano, and L. Zanotti
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Neutral current, Branching fraction, lcsh:QC1-999, law.invention, Nuclear physics, law, Gargamelle, Antimatter, Physics::Accelerator Physics, High Energy Physics::Experiment, Beam dump, Neutrino, lcsh:Physics, Charged current, Lepton
Abstract: A beam dump experiment has been performed at CERN in Gargamelle using the neutrino facility to look for penetrating particles produced either directly in the beam interaction or by prompt decay of new particles. A total of 32 interactions with a visible energy greater than 10 GeV has been found, classified, aftercorrections, into 18 charged current ν μ or ν μ , 5.1 neutral current and 8.9 ν e or ν e charged current events. An excess of ν e events remains after all subtractions from any established sources. Results are presented in terms of the product of the cross section and the leptonic decay branching ratio of the possible source.
Published: 1978
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11. Lepton pair production in deep inelastic e-γ scattering

Author: G. Buschhorn, G. Cozzika, J. Pamela, M. J. Schachter, Jean-Francois Grivaz, H. Lierl, A. Gaidot, G. London, J. Bouchez, D. C. Fries, C. Kiesling, Horst Oberlack, U. Gümpel, R. Kotthaus, H. Fenner, W. Fues, Luc Poggioli, G. Grindhammer, W. De Boer, H. Schneider, V. Journé, G. Schmidt, A. Cordier, G. Flügge, D. Lüers, O. Hamon, Daniel Fournier, M. Goldberg, S. Banerjee, Y. Lavagne, V. Schröder, F. Pierre, G. Hopp, F. Le Diberder, J. Bodenkamp, R. George, J. Haissinski, F. Kovacs, F. Laplanche, J. H. Field, W. D. Apel, M. Rivoal, H. J. Behrend, J. J. Veillet, B. Grossetete, G. Carnesecchi, R. Aleksan, B. Gunderson, P. Colas, Peter Schacht, H. Küster, H. Randoll, F. Kapusta, H. Sindt, G. D'Agostini, Y. Ducros, U. Mallik, P. Grosse-Wiesmann, K. Gamerdinger, M. Davier, H. Müller, J. P. Pansart, J. Engler, and U. Kruse
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Pair production, Muon, Scattering, High Energy Physics::Experiment, Feynman graph, Electron, Photon structure function, Lepton
Abstract: At PETRA we have measured the process e + γ → e + l + + l − , where l is either an electron or a muon, at an average Q 2 of 9.5 GeV 2 / c 2 . The total number of collected events is 240. We find that our data agree with QED predictions based either on exact Feynman graph calculations or on the photon structure function expressions.
Published: 1983
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12. Scalar lepton search with the CELLO detector at PETRA

Author: J. Bouchez, Y. Ducros, G. Grindhammer, U. Mallik, O. Hamon, F. Kovacs, H. Müller, S. Banerjee, J. Engler, P. Grosse-Wiesmann, R. Kotthaus, J. Bodenkamp, M. Rivoal, F. Pierre, R. George, A. Cordier, S. Jadach, H. J. Behrend, Luc Poggioli, G. Schmidt, F. Kapusta, P. Colas, T. Meyer, H. Randoll, Y. Lavagne, F. Le Diberder, M. Goldberg, J. J. Veillet, R. Aleksan, G. Flügge, D. Lüers, G. Hopp, Jean-Francois Grivaz, J. Haissinski, M. J. Schachter, U. Kruse, A. Gaidot, C. Kiesling, G. Cozzika, W. D. Apel, V. Schröder, Ch. Chen, H. Fenner, H. Schneider, B. Grossetete, Horst Oberlack, W. Fues, M. Davier, V. Journé, J. P. Pansart, D. Chrobaczek, A. Snyder, Peter Schacht, H. Küster, G. D'Agostini, K. Gamerdinger, G. Carnesecchi, B. Gunderson, H. Sindt, W. De Boer, A. Klarsfeld, H. Lierl, J. H. Field, G. Buschhorn, Daniel Fournier, G. London, D. C. Fries, J. Pamela, and F. Laplanche
Subjects: Physics, Nuclear and High Energy Physics, High energy, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, Detector, Scalar (physics), Cello, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Storage ring, Lepton
Abstract: We report on the search for “supersymmetric” scalar leptons conducted with the CELLO detector, at the PETRA e + e − storage ring. 11.1 pb −1 of high energy data were analysed ( 33 GeV s GeV ). At a 95% c.l., the existence of a scalar e is ruled out for masses between 2 GeV and 16.8 GeV; correspondingly, a scalar μ is excluded between 3.3 GeV and 16 GeV, and a scalar τ between 6 GeV and 15.3 GeV, as well as between the τ mass and 3.8 GeV.
Published: 1982
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13. Analysis of the energy weighted angular correlations in hadronice + e ? annihilations at 22 and 34 GeV

Author: R. Kotthaus, G. Cozzika, G. Carnesecchi, Jean-Francois Grivaz, G. Flügge, D. Lüers, J. H. Field, C. Kiesling, V. Schröder, J. Bodenkamp, H. Steiner, Ch. Chen, Luc Poggioli, P. Grosse-Wiesmann, H. Fenner, R. George, Y. Lavagne, G. Buschhorn, G. Schmidt, G. London, H. J. Behrend, D. C. Fries, M. Goldberg, J. Bouchez, Y. Ducros, J. P. Pansart, F. Laplanche, U. Mallik, H. Sindt, A. Klarsfeld, T. Meyer, H. Müller, F. Kovacs, S. Jadach, J. Pamela, B. Gunderson, W. De Boer, A. Cordier, U. Kruse, J. J. Veillet, G. Hopp, A. Gaidot, R. Aleksan, P. Colas, G. Grindhammer, D. Chrobaczek, Horst Oberlack, A. Snyder, Daniel Fournier, M. Rivoal, J. Engler, H. Lierl, J. Haissinski, B. Grossetete, H. Randoll, M. Davier, O. Hamon, F. Pierre, H. Schneider, S. Banerjee, M. J. Schachter, Peter Schacht, H. Küster, G. D'Agostini, K. Gamerdinger, W. Fues, V. Journé, W. D. Apel, F. Kapusta, and F. Le Diberder
Subjects: Nuclear physics, Physics, Particle physics, Positron, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Physics::Accelerator Physics, High Energy Physics::Experiment, Electron, Nuclear Experiment, Engineering (miscellaneous), Energy (signal processing)
Abstract: Measurements of energy weighted angular correlations in electron positron annihilations at c.m. energies of 22 GeV and 34 GeV are presented.
Published: 1982
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14. Observation of a multiparticle event with two isolated energetic muons in e+e- interactions

Author: R. George, Jean-Arcady Meyer, F. Kovacs, G. Hopp, M. Gaspero, Peter Schacht, H. Küster, G. D'Agostini, L. Criegee, K. Gamerdinger, Patrick Jarry, G. Schmidt, B. Gunderson, Alan Campbell, W. De Boer, G. Grindhammer, Kevin M. Smith, G. Carnesecchi, Jean-Francois Grivaz, Th. Henkes, O. Hamon, A. Cordier, Daniel Fournier, W. Fues, V. Journé, Gideon Alexander, Gideon Bella, H. Schneider, C. Kiesling, H. Fenner, M. Goldberg, G. G. Winter, H. Randoll, M. Davier, W. Zimmermann, F. Pierre, G. Bonneaud, J. Haissinski, Luc Poggioli, R. Pain, J. J. Veillet, R. Aleksan, Eduardo Ros, G. Flügge, J. Knapp, D. Lüers, I. O. Skillicorn, J. M. Scarr, V. Schröder, P. J. Bussey, F. Kapusta, U. Timm, H. J. Behrend, J. H. Field, P. Grosse-Wiesmann, F. Le Diberder, G. Buschhorn, Y. Gnat, D. C. Fries, G. Franke, A. Gaidot, D. Hendry, Horst Oberlack, Y. Lavagne, G. Cozzika, F. Ould Saada, B. Stella, R. Kotthaus, H. Lierl, H. Sindt, H. Spitzer, K. H. Ranitzsch, O. Achterberg, P. Colas, Y. Ducros, U. Mallik, H. Müller, J. B. Dainton, J. P. Pansart, J. Engler, J. Pamela, M. Krüger, M. Rivoal, J. Bürger, J. Grunhaus, J. Bouchez, B. Forstbauer, W. D. Apel, M. Poppe, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CELLO
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Muon, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, Hadron, Expected value, 01 natural sciences, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Event (particle physics)
Abstract: An event from e+e− annihilation at √s = 43.450 GeV containing two topologically isolated energetic muons and two hadronic jets has been observed. The masses of the μ−μ, jet-jet and μ-jet combinations are all large. The expected number of such events from known processes is about 10−3.
Published: 1984
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15. Measurement of e+e−→τ+τ− at high energy and properties of the τ lepton

Author: J. J. Veillet, W. De Boer, R. Aleksan, R. Kotthaus, H. Sindt, J. Engler, P. Grosse-Wiesmann, S. Jadach, H. J. Behrend, F. Laplanche, A. Gaidot, P. Colas, Horst Oberlack, A. Cordier, H. Randoll, G. Cozzika, J. Haissinski, J. Bodenkamp, A. Klarsfeld, Luc Poggioli, R. George, J. H. Field, J. Bouchez, H. Lierl, F. Le Diberder, B. Gunderson, Y. Lavagne, M. J. Schachter, D. Chrobaczek, B. Grossetete, G. Buschhorn, W. D. Apel, H. Schneider, J. Pamela, G. London, Y. Ducros, Daniel Fournier, M. Davier, Peter Schacht, H. Küster, U. Mallik, H. Müller, D. C. Fries, G. D'Agostini, G. Schmidt, Jean-Francois Grivaz, K. Gamerdinger, S. Banerjee, Ch. Chen, G. Flügge, D. Lüers, C. Kiesling, H. Fenner, M. Goldberg, V. Schröder, G. Hopp, J. P. Pansart, G. Grindhammer, W. Fues, F. Kapusta, V. Journé, A. Snyder, T. Meyer, M. Rivoal, U. Kruse, G. Carnesecchi, O. Hamon, F. Pierre, and F. Kovacs
Subjects: Coupling, Physics, Nuclear and High Energy Physics, Particle physics, High energy, Neutral current, Branching fraction, media_common.quotation_subject, Asymmetry, Nuclear physics, Angular distribution, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Lepton, media_common
Abstract: The e+e−→τ+τ− process has been measured using the CELLO detector at a mean total centre of mass energy of 34.2 GeV using essentially all the decay channels of the τ lepton. The measured cross section yields Rτ=1.03±0.05 (stat)±0.07 (syst). Topological branching fraction are given for τ → 1, 3 or 5 charged tracks. The angular distribution shows a clear 1 + cos2θ dependance with a forward-backward asymmetry of -0.103 ± 0.052 corresponding to an axial-vector coupling aτ of the τ to the weak neutral current given by aτ=−1.12 ± 0.57.
Published: 1982
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16. Coupling strengths of weak neutral currents from leptonic final states at 22 and 34 GeV

Author: G. London, D. C. Fries, J. Pamela, Y. Lavagne, R. Kotthaus, J. Bouchez, B. Grossetete, G. Cozzika, Luc Poggioli, S. Jadach, P. Colas, G. Flügge, D. Lüers, J. Bodenkamp, M. Rivoal, V. Schröder, G. Grindhammer, O. Hamon, G. Schmidt, A. Klarsfeld, R. George, Y. Ducros, F. Laplanche, U. Mallik, F. Kovacs, S. Banerjee, F. Pierre, H. Müller, H. J. Behrend, A. Cordier, F. Kapusta, J. J. Veillet, M. Goldberg, Ch. Chen, B. Gunderson, W. D. Apel, J. H. Field, M. J. Schachter, R. Aleksan, H. Randoll, G. Carnesecchi, J. Haissinski, M. Davier, H. Sindt, G. Hopp, J. P. Pansart, W. Fues, J. Engler, V. Journé, Daniel Fournier, A. Gaidot, H. Schneider, Horst Oberlack, Jean-Francois Grivaz, H. Lierl, C. Kiesling, Peter Schacht, H. Küster, H. Fenner, G. D'Agostini, K. Gamerdinger, G. Buschhorn, W. De Boer, P. Grosse-Wiesmann, and U. Kruse
Subjects: Physics, Coupling, Coupling constant, Particle physics, Physics and Astronomy (miscellaneous), Scattering, High Energy Physics::Phenomenology, Electroweak interaction, Weak interaction, Standard Model, Nuclear physics, High Energy Physics::Experiment, Engineering (miscellaneous), Pseudovector, Lepton
Abstract: Differential cross sections fore +e−→e +e−, τ+, τ- measured with the CELLO detector at $$\left\langle {\sqrt s } \right\rangle = 34.2GeV$$ have been analyzed for electroweak contributions. Vector and axial vector coupling constants were obtained in a simultaneous fit to the three differential cross sections assuming a universal weak interaction for the charged leptons. The results,v 2=−0.12±0.33 anda 2=1.22±0.47, are in good agreement with predictions from the standardSU(2)×U(1) model for $$\sin ^2 \theta _w = 0.228$$ . Combining this result with neutrino-electron scattering data gives a unique axial vector dominated solution for the leptonic weak couplings. Assuming the validity of the standard model, a value of $$\sin ^2 \theta _w = 0.21_{ - 0.09}^{ + 0.14}$$ is obtained for the electroweak mixing angle. Additional vector currents are not observed (C
Published: 1983
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17. Observation of topologically isolated energetic electrons in e+e− interactions

Author: J. Haissinski, M. J. Schachter, G. Flügge, D. Lüers, V. Schröder, F. Kovacs, F. Le Diberder, B. Gunderson, R. Aleksan, H. Lierl, G. Grindhammer, S. Jadach, R. Kotthaus, W. Fues, M. Davier, G. Hopp, V. Journé, P. Colas, Ch. Chen, A. Gaidot, Horst Oberlack, M. Rivoal, Luc Poggioli, J. P. Pansart, J. Bouchez, Y. Ducros, W. D. Apel, Daniel Fournier, U. Mallik, G. Buschhorn, H. Müller, H. Sindt, D. Chrobaczek, A. Cordier, G. Schmidt, A. Klarsfeld, J. Bodenkamp, R. George, G. London, D. C. Fries, S. Banerjee, J. H. Field, W. De Boer, Peter Schacht, H. Küster, G. D'Agostini, K. Gamerdinger, H. Schneider, H. J. Behrend, M. Goldberg, G. Cozzika, Y. Lavagne, B. Grossetete, Jean-Francois Grivaz, C. Kiesling, H. Fenner, J. Pamela, O. Hamon, F. Pierre, J.J. Viellet, P. Grosse-Wiesmann, H. Randoll, G. Carnesecchi, F. Laplanche, U. Kruse, F. Kapusta, J. Engler, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CELLO, and Starita, Sabine
Subjects: Physics, Nuclear and High Energy Physics, Annihilation, Luminosity (scattering theory), [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Scattering, Astrophysics::High Energy Astrophysical Phenomena, Compton scattering, Electron, Inelastic scattering, 01 natural sciences, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Center of mass, Atomic physics, 010306 general physics, Event (particle physics)
Abstract: In e + e − interactions at 34 GeV center of mass energy, using an integrated luminosity of 7.4 pb −1 , 18 events are observed where an electron (position) appears with an energy above 4 GeV, at lasrge angle with respect to the beam direction, and well separated from other emerging charged and neutral particles. The characteristics of these events are found to be in agreement with the event characteristics expected from deep inelastic electron-photon scattering and inelastic Compton scattering, together with at most a small contribution from multihadron annihilation.
Published: 1982
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18. Inclusive γ and π0 production ine + e − annihilation at 14, 22 and 34 GeV c.m. energy

Author: J. Bouchez, Luc Poggioli, P. Grosse-Wiesmann, H. Randoll, G. Grindhammer, R. Kotthaus, P. Colas, J. Engler, A. Gaidot, Horst Oberlack, G. Flügge, D. Lüers, A. Cordier, J. Haissinski, Y. Lavagne, J. Pamela, G. Cozzika, H. Sindt, F. Kovacs, B. Grossetete, Jean-Francois Grivaz, J. P. Pansart, J. J. Veillet, O. Hamon, R. Aleksan, V. Schröder, C. Kiesling, H. J. Behrend, Y. Ducros, G. Hopp, H. Fenner, F. Laplanche, F. Pierre, U. Mallik, H. Müller, M. J. Schachter, H. Schneider, R. George, J. H. Field, M. Rivoal, W. Fues, V. Journé, G. London, D. C. Fries, F. Le Diberder, Peter Schacht, H. Küster, G. Schmidt, G. D'Agostini, M. Goldberg, K. Gamerdinger, W. D. Apel, F. Kapusta, M. Davier, B. Gunderson, W. De Boer, G. Buschhorn, U. Kruse, H. Lierl, G. Carnesecchi, and Daniel Fournier
Subjects: Quantum chromodynamics, Physics, Range (particle radiation), Particle physics, Photon, Annihilation, Physics and Astronomy (miscellaneous), Scale invariance, Standard deviation, Nuclear physics, Pion, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Scaling
Abstract: We have measured the scale invariant inclusive photon and π0 cross sections atW=14, 22 and 34 GeV. A comparison with π± data shows no significant difference between neutral and charged pion production. Comparing the integrated cross sections in thex range 0.15
Published: 1983
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19. Production of thef 0(1270) meson in photon-photon collisions

Author: Eduardo Ros, R. George, F. Kapusta, Werner Wiedenmann, R. Kotthaus, Peter Schacht, Y. Lavagne, H. J. Behrend, W. Fues, H. Randoll, V. Journé, M. Davier, B. Grossetete, G. D'Agostini, Daniel Fournier, G. London, F. Laplanche, K. Gamerdinger, J. H. Field, D. C. Fries, G. Grindhammer, F. Le Diberder, G. Carnesecchi, A. Cordier, B. Forstbauer, H. Lierl, CELLO-Collaboration, W. D. Apel, Luc Poggioli, R. Pain, O. Hamon, Th. Henkes, F. Pierre, B. Gunderson, A. Snyder, G. Hopp, U. Kruse, P. Grosse-Wiesmann, Jean-Francois Grivaz, Patrick Jarry, W. De Boer, M. Rivoal, G. Cozzika, G. Flügge, C. Kiesling, D. Lüers, H. Fenner, M. Krüger, H. Schneider, V. Schröder, J. Bouchez, G. Buschhorn, J. Pamela, M. J. Schachter, F. Kovacs, G. Schmidt, J. J. Veillet, R. Aleksan, M. Goldberg, A. Gaidot, Horst Oberlack, J. Haissinski, H. Sindt, G. Bonneaud, O. Achterberg, P. Colas, J. P. Pansart, J. Engler, Y. Ducros, U. Mallik, and H. Müller
Subjects: Physics, Nuclear physics, Particle physics, Photon, Amplitude, Physics and Astronomy (miscellaneous), Meson, Radiative transfer, Mass spectrum, Elementary particle, Engineering (miscellaneous), Helicity, Free parameter
Abstract: The production of thef0 in two photon collisions, with the subsequent decayf0→π+π− has been observed in the CELLO detector at PETRA. Thef0 peak was found to lie on a dipion continuum and to be shifted downwards in mass by ≃50 MeV/c2. The ππ mass spectrum from 0.8 to 1.5 GeV/c2 was well fitted by the model of Mennessier using only a unitarised Born amplitude and helicity 2f0 amplitude. The previously observed mass shift and distortion of thef0 peak are explained by strong interference between the Born andf0 amplitudes. The only free parameter in the fit of the data to the model is the radiative widthΓγγ(f0). It was found that:Γγγ(f0)=2.5±0.1±0.5 keV where the first (second) quoted errors are statistical (systematic).
Published: 1984
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20. τ Branching ratios and polarization limits in e+e− interaction at √s=34GeV

Author: B. Gunderson, Jean-Francois Grivaz, C. Kiesling, G. Buschhorn, H. Fenner, A. Cordier, J. Bodenkamp, R. George, F. Laplanche, H. Schneider, G. London, O. Hamon, G. Grindhammer, D. C. Fries, H. Lierl, R. Kotthaus, P. Grosse-Wiesmann, G. Flügge, D. Lüers, Daniel Fournier, Ch. Chen, W. De Boer, M. Rivoal, U. Gümpel, V. Schröder, J. H. Field, Luc Poggioli, A. Gaidot, H. Randoll, M. Davier, Horst Oberlack, J. Pamela, J. Haissinski, F. Pierre, Y. Ducros, U. Kruse, U. Mallik, Y. Lavagne, G. Schmidt, F. Kovacs, M. J. Schachter, H. J. Behrend, H. Müller, J. P. Pansart, J. Engler, G. Carnesecchi, H. Sindt, W. D. Apel, F. Kapusta, W. Fues, B. Grossettête, J. J. Veillet, R. Aleksan, V. Journé, P. Colas, M. Goldberg, G. Hopp, J. Bouchez, A. Klarsfeld, Peter Schacht, H. Küster, G. D'Agostini, K. Gamerdinger, S. Banerjee, and G. Cozzika
Subjects: Physics, Coupling constant, Nuclear and High Energy Physics, Neutral current, media_common.quotation_subject, Electron–positron annihilation, Polarization (waves), Asymmetry, Spectral line, Nuclear physics, Factorization, Atomic physics, media_common, Lepton
Abstract: Results on the dominant decays of τ leptons produced in e + e − interactions at √ s =34 GeV are presented. We obtain the branching ratios BR( τ → ϱv )=0.228 ± 0.033, BR( τ → πv )=0.099 ± 0.021, BR( τ → e vv )=0.183 ± 0.031 , BR( τ → μvv )=0.176+- 0.033. From the laboratory momentum spectra of the observed decay products we determined the τ polarization asymmetry to (1 ± 22)% and thereby derive limits for the vector coupling constant υ τ of the τ to the weak neutral current. Tests on university and factorization are discussed.
Published: 1983
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21. An analysis of the charged and neutral energy flow in e+e− hadronic annihilation at 34 GeV, and a determination of the QCD effective coupling constant

Author: Luc Poggioli, G. Schmidt, J. Engler, J. Haissinski, F. Kovacs, Ch. Chen, P. Grosse-Wiesmann, S. Jadach, R. Kotthaus, J. Bouchez, J. P. Pansart, M. J. Schachter, J. J. Veillet, J. Bodenkamp, R. Aleksan, P. Colas, A. Gaidot, R. George, Horst Oberlack, M. Goldberg, A. Snyder, W. De Boer, Daniel Fournier, F. Le Diberder, A. Cordier, B. Grossetěte, W. D. Apel, H. Randoll, G. Cozzika, H. J. Behrend, Peter Schacht, H. Küster, Y. Ducros, A. Klarsfeld, U. Mallik, G. Buschhorn, Y. Lavagne, G. D'Agostini, J. H. Field, H. Müller, H. Sindt, B. Gunderson, F. Kapusta, G. Flügge, D. Lüers, K. Gamerdinger, H. Lierl, W. Fues, Jean-Francois Grivaz, V. Journé, C. Kiesling, D. Chrobaczek, H. Schneider, H. Fenner, S. Banerjee, M. Davier, F. Laplanche, J. Pamela, G. Grindhammer, G. Hopp, V. Schröder, T. Meyer, U. Kruse, G. London, D. C. Fries, G. Carnesecchi, M. Rivoal, O. Hamon, and F. Pierre
Subjects: Quantum chromodynamics, Physics, Coupling constant, Nuclear and High Energy Physics, Particle physics, Annihilation, Electron–positron annihilation, Hadron, Gamma ray, Nuclear physics, Energy flow, High Energy Physics::Experiment, Nuclear Experiment, Energy (signal processing)
Abstract: Using both charged and neutral components, 2600 multihadronic e + e − annihilation events, recorded at 34 GeV by the CELLO detector at PETRA, have been analysed in a calometric approach. The fraction of energy carried by gamma rays is measured to be f γ = (26.0 ± 0.4 (stat) ± 4.0 (syst)%. The neutral energy flow is seen to follow closely the overall energy flow. From the corrected oblateness distribution, a first order determination of α s is performed. The result is α s = 0.16 ± 0.01 (stat) ± 0.03 (syst).
Published: 1982
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22. Determination of the radiative widths of the η′ and A2 from two-photon exchange production

Author: M. J. Schachter, T. Meyer, U. Kruse, R. Kotthaus, F. Laplanche, S. Banerjee, A. Klarsfeld, H. Randoll, Ch. Chen, G. Hopp, O. Hamon, H. Schneider, W. De Boer, J. Pamela, J. P. Pansart, Peter Schacht, H. Küster, G. D'Agostini, K. Gamerdinger, Luc Poggioli, Y. Lavagne, G. Schmidt, F. Pierre, G. Grindhammer, F. Kovacs, G. Carnesecchi, G. London, B. Grossetete, H. Sindt, D. C. Fries, M. Rivoal, J. J. Veillet, R. Aleksan, H. Lierl, H. J. Behrend, J. Bodenkamp, F. Kapusta, R. George, W. D. Apel, J. Bouchez, M. Goldberg, G. Flügge, D. Lüers, P. Grosse-Wiesmann, B. Gunderson, G. Buschhorn, V. Schröder, G. Cozzika, F. Le Diberder, A. Gaidot, Horst Oberlack, D. Chrobaczek, A. Snyder, Daniel Fournier, J. H. Field, H. Steiner, M. Davier, J. Engler, J. Haissinski, Jean-Francois Grivaz, W. Fues, A. Cordier, C. Kiesling, H. Fenner, V. Journé, S. Jadach, P. Colas, Y. Ducros, U. Mallik, and H. Müller
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Two-photon excitation microscopy, Radiative transfer, Atomic physics
Abstract: From the two-photon exchange processes e + e − → e + e − η ' (958) → e + e − ϱ 0 γ and e + e − → e + e − A 2 (1310) → e + e − π + π − π 0 observed using the CELLO detector at PETRA the radiative widths of the η' and A 2 have been determined with the results: Γ γγ ( η ') = 5.4 ± 1.0[stat.] ± 0.7[syst.] keV; Γ γγ (A 2 ) = 0.59 ± 0.14[stat.] −0.08 +0.31 [syst.] keV.
Published: 1982
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23. Measurement of the reaction γγ→π+π+π−π− at PETRA

Author: M. Krüger, Y. Ducros, M. Rivoal, U. Mallik, H. Müller, Luc Poggioli, Peter Schacht, P. Grosse-Wiesmann, H. Küster, O. Achterberg, A. Cordier, G. Grindhammer, M. J. Schachter, G. D'Agostini, P. Colas, Daniel Fournier, K. Gamerdinger, Y. Lavagne, Eduardo Ros, R. Kotthaus, F. Kovacs, O. Hamon, F. Pierre, B. Forstbauer, W. D. Apel, B. Grossetete, H. J. Behrend, J. J. Veillet, R. Aleksan, G. Cozzika, R. Pain, F. Laplanche, H. Lierl, G. Schmidt, A. Gaidot, B. Gunderson, Horst Oberlack, J. H. Field, W. Fues, V. Journé, W. De Boer, G. Carnesecchi, M. Goldberg, Jean-Francois Grivaz, C. Kiesling, J. Haissinski, J. Bouchez, H. Fenner, H. Sindt, G. Buschhorn, G. Flügge, D. Lüers, Th. Henkes, F. Kapusta, V. Schröder, J. Pamela, G. Hopp, F. Le Diberder, Patrick Jarry, J. P. Pansart, J. Engler, G. London, D. C. Fries, H. Schneider, G. Bonneaud, H. Randoll, M. Davier, R. George, and U. Kruse
Subjects: Nuclear physics, Physics, Cross section (physics), Physics and Astronomy (miscellaneous), Moment analysis, Phase space, Resonance, Engineering (miscellaneous), Helicity, Uncorrelated
Abstract: We have determined the cross section for γγ→π+π+π−π− in a way free of assumptions about the relative contributions fromρ 0 ρ 0,ρ 02π and 4π (uncorrelated phase space). We find a sharp onset above threshold and a rather high cross section of about 200 nb aroundW γγ=1.5 GeV which consists to about 40% ofρ 0 ρ 0 production with sizeable contributions fromρ 02π and 4π (PS). The total cross section as well as theρ 0 ρ 0 content fall rather fast at higher c.m. energies. Attempts to explain this behaviour in terms of production of known resonances are not successful so far. The angular distributions do not show any significant structure pointing to resonance formation in the 4π-system. Only theρ 0-meson is observed in the moment analysis. The decay distributions of theρ 0 for forward produced rhos are fairly consistent with helicity conservation of the produced rhos in accordance with the VDM picture.
Published: 1984
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24. Measurement of the τ lifetime

Author: R. Kotthaus, G. Grindhammer, J. Bodenkamp, R. George, J. Pamela, Y. Ducros, D. Chrobaczek, U. Mallik, Jean-Francois Grivaz, C. Kiesling, H. Fenner, M. J. Schachter, H. Sindt, H. Müller, G. Hopp, H. J. Behrend, M. Goldberg, G. Flügge, D. Lüers, H. Randoll, O. Hamon, M. Davier, A. Cordier, W. D. Apel, G. London, Ch. Chen, F. Pierre, Y. Lavagne, F. Kapusta, J. Haissinski, J. Bouchez, J. H. Field, D. C. Fries, A. Gaidot, Horst Oberlack, G. Cozzika, Peter Schacht, H. Küster, J. P. Pansart, J. Engler, V. Schröder, P. Grosse-Wiesmann, B. Grossetete, F. Laplanche, A. Klarsfeld, G. Schmidt, G. D'Agostini, F. Kovacs, K. Gamerdinger, S. Banerjee, J. J. Veillet, R. Aleksan, W. Fues, Luc Poggioli, H. Schneider, V. Journé, S. Jadach, P. Colas, A. Snyder, Daniel Fournier, B. Gunderson, M. Rivoal, W. De Boer, G. Buschhorn, H. Lierl, G. Carnesecchi, T. Meyer, and U. Kruse
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Detector, Cello, Lepton
Abstract: Using the 3-prong decays of τ leptons observed at the CELLO detector at PETRA, the τ lifetime is determined to be 4.7( −2.9 +3.9 )×10 −13 s.
Published: 1983
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25. Measurement of the reactione + e −→μ + μ − for $$14 \leqq \sqrt S \leqq 36.4$$ GeV

Author: F. Le Diberder, F. Kapusta, O. Hamon, R. Kotthaus, M. J. Schachter, A. Snyder, J. Engler, F. Pierre, H. Randoll, S. Banerjee, G. Grindhammer, B. Gunderson, A. Klarsfeld, G. Buschhorn, M. Rivoal, A. Cordier, G. Carnesecchi, Luc Poggioli, J. Haissinski, J. Bouchez, G. Flügge, D. Lüers, Y. Lavagne, Ch. Chen, J. Bodenkamp, V. Schröder, R. George, G. London, B. Grossetete, P. Grosse-Wiesmann, J. P. Pansart, D. C. Fries, M. Davier, Daniel Fournier, Peter Schacht, H. Lierl, Jean-Francois Grivaz, H. Küster, G. D'Agostini, C. Kiesling, T. Meyer, K. Gamerdinger, W. De Boer, H. Fenner, F. Laplanche, U. Kruse, W. Fues, H. Schneider, V. Journé, J. Pamela, Y. Ducros, W. D. Apel, U. Mallik, H. Müller, S. Jadach, G. Hopp, G. Cozzika, P. Colas, J. H. Field, H. J. Behrend, M. Goldberg, D. Chrobaczek, G. Schmidt, H. Sindt, A. Gaidot, Horst Oberlack, F. Kovacs, J. J. Veillet, and R. Aleksan
Subjects: Physics, High energy, Particle physics, Physics and Astronomy (miscellaneous), media_common.quotation_subject, Electron–positron annihilation, Model prediction, Charge (physics), Coupling (probability), Asymmetry, Nuclear physics, Angular distribution, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), media_common
Abstract: The reaction (e + e −→μ + μ −) has been measured between $$\sqrt S = 14.0$$ and $$\sqrt S = 36.4$$ . The total cross section result is in good agreement with the QED prediction and the following Λ values have been obtained:Λ +=186 GeV,Λ −=101 GeV. The angular distribution at high energy ( $$\left( {\left. {\left\langle {\sqrt S } \right.} \right\rangle = 34.2 GeV} \right)$$ ) shows a fitted charge asymmetry of −0.064±0.064 in agreement with theW-S model prediction of −0.092, corresponding to an axial coupling parametera 2=4g 2 =0.69±0.69.
Published: 1982
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26. Measurement of inclusive γ and π0 spectra and a comparison of the neutral and charged components in hadronic events ine + e − annihilation at 34 GeV

Author: G. Flügge, J. H. Field, V. Schröder, J. Engler, H. Lierl, Peter Schacht, H. Küster, Y. Ducros, J. Haissinski, U. Mallik, G. D'Agostini, H. Müller, Jean-Francois Grivaz, G. Buschhorn, A. Cordier, G. London, K. Gamerdinger, D. C. Fries, G. Schmidt, G. Grindhammer, T. Meyer, H. Randoll, C. Kiesling, H. Fenner, S. Banerjee, G. Cozzika, M. J. Schachter, S. Jadach, P. Colas, Y. Lavagne, D. Lücrs, F. Le Diberder, M. Rivoal, M. Davier, W. De Boer, Luc Poggioli, U. Kruse, J. Bodenkamp, O. Hamon, M. Goldberg, F. Kovacs, W. D. Apel, B. Grossetete, R. George, J. Pamela, F. Pierre, R. Kotthaus, H. J. Behrend, J. J. Veillet, R. Aleksan, Ch. Chen, H. Schneider, P. Grosse-Wiesmann, D. Chrobaczek, G. Hopp, J. Bouchez, J. P. Pansart, F. Kapusta, A. Klarsfeld, A. Gaidot, Horst Oberlack, H. Steiner, F. Laplanche, G. Carnesecchi, A. Snyder, W. Fues, V. Journé, H. Sindt, Daniel Fournier, and B. Gunderson
Subjects: Physics, Particle physics, Annihilation, Photon, Physics and Astronomy (miscellaneous), Electron–positron annihilation, Hadron, Elementary particle, Spectral line, Momentum, Nuclear physics, High Energy Physics::Experiment, Engineering (miscellaneous), Event (particle physics)
Abstract: The photonic part of multihadronice+e− annihilation events has been analyzed at a c.m. energy of 34 GeV. The photonic energy fraction per event is determined to befγ=0.251±0.003 (stat.) ±0.04 (syste.). The neutral and charged components of the events are analyzed separately revealing close similarity in thrust axis directions and momentum distributions in agreement with the hypothesis that most photons result from π0 decay. π0's are reconstructed separately and used to determine the inclusive cross section. Comparing these cross sections with lower energy data from SPEAR we find some indication for scaling violation.
Published: 1982
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27. Cello-A New Detector at PETRA

Author: CELLO Collaboration, Mina-Jacqueline Schachter, H-J Behrend, J Field, V Schröder, H Sindt, W-D Apel, J Bodenkamp, D Chrobaczek, J Engler, D C Fries, G Flügge, F Mönnig, H Müller, H Randoll, G Schmidt, H Schneider, W de Boer, G Buschhorn, G Grindhammer, P Grosse-Wiesmann, B Gunderson, C Kiesling, R Kotthaus, H Lierl, D Lüers, T Meyer, L Moss, H Oberlack, P Schacht, A Snyder, H Steiner, G Carnesecchi, A Cordier, M Davier, D Fournier, J F Grivaz, J Haissinski, V Journé, F Laplanche, F Le Diberder, J-J Veillet, A Weitsch, R George, M Goldberg, B Grossetête, F Kapusta, F Kovacs, G London, L Poggioli, M Rivoal, R Aleksan, J Bouchez, G Cozzika, Y Ducros, A Gaidot, J Pamela, J P Pansart, and F Pierre
Subjects: Physics, Nuclear physics, Detector, High Energy Physics::Experiment, Electronics, Magnetic detector, Condensed Matter Physics, Cello, Physics::History of Physics, Mathematical Physics, Atomic and Molecular Physics, and Optics, Design characteristics, Beam (structure)
Abstract: A description of the design characteristics of CELLO, a large 4Π magnetic detector at PETRA, is given and first results of beam operation are presented.
Published: 1981
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28. Evidence for charmed baryon 'elastic' production in neutrino reactions at the CERN SPS

Author: P. Musset, G. Carnesecchi, Salvatore Nuzzo, J. P. Albanese, P. Busson, U. Nguyen-Khac, S. Bonetti, M.T. Fogli-Muciaccia, Ph. Heusse, Donatella Cavalli, J. Sleeman, A. Bouchakour, N. Armenise, B. Degrange, and A. Pullia
Subjects: Nuclear physics, Physics, Baryon, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Branching fraction, Gargamelle, Bubble chamber, Neutrino beam, Neutrino, P system
Abstract: Evidence for charmed baryon “elastic” production is found in a sample of 55 000 charged-current neutrino interactions in the bubble chamber Gargamelle exposed to the SPS wide-band neutrino beam. The product of the average cross section times the branching ratio into modes including a Λ 0 or a K 0 p system is found to be α · B =(14.3 ± 7.4) × 10 −40 cm 2 for ν+n reactions and α · B −40 cm 2 (90% CL) for ν+p reactions.
Published: 1981
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29. Measurement of e+e− → e+e− and e+e− → λλ at energies up to 36.7 GeV

Author: H. Schneider, Peter Schacht, Jean-Francois Grivaz, W. De Boer, Daniel Fournier, G. Grindhammer, F. Pierre, L. Moss, C. Kiesling, R. Kotthaus, H. J. Behrend, M. Goldberg, B. Gunderson, H. Lierl, A. Gaidot, Horst Oberlack, G. Buschhorn, M. J. Schachter, F. Mönnig, J. Engler, Y. Ducros, J. Bouchez, F. Laplanche, P. Grosse-Wiesman, U. Mallik, H. Randoll, H. Müller, J. Pamela, J. Haissinski, F. Kapusta, F. Kovacs, A. Weitsch, G. Schmidt, H. Sindt, J. J. Veillet, R. Aleksan, W. D. Apel, M. Rivoal, D. C. Fries, G. Londen, B. Grossetete, U. Gümpel, D. Chrobaczek, J. H. Field, H. Steiner, A. Klarsfeld, F. de Diberder, G. Hopp, Ch. Chen, J. P. Pansart, V. Journé, A. Snyder, G. Cozzika, A. Cordier, Luc Poggioli, G. Flügge, D. Lüers, V. Schröder, J. Bodenkamp, R. George, M. Cohen, M. Davier, G. Carnesecchi, T. Meyer, and U. Kruse
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Electroweak interaction, High Energy Physics::Experiment, Differential (mathematics), Lower limit, Standard Model
Abstract: The differential cross sections of the reactions e + e − → e + e − and e + e − → λλ are measured at energies between 33.0 and 36.7 GeV. The results agree with the predictions of quantum electrodynamics. A comparison with the standard model of electroweak interaction yields sin 2 θ W = 0.25 ± 0.13.
Published: 1981
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30. Study of quasi-elastic reactions of ν and $$\overline v $$ in gargamellein gargamelle

Author: Alberto Pullia, G. Carnesecchi, F. Romano, D. Cavalli, M. Rollier, R. Schira, P. Negri, and S. Bonetti
Subjects: Physics, Dipole, Overline, Gargamelle, Energy spectrum, Form factor (quantum field theory), Atomic physics, Spectral line, Charged current
Abstract: The quasi-elastic cross-sectionsσeltot and dσ/dq2 for the reactions 1) νn → μ−p and 2)$\overline v $ → μ+n have been measured by using the data of the ν Gargamelle collaboration. 687 ν events, candidates for reaction 1), and 476$\overline v $ events, candidates for the reactions 2), have been used for the analysis. Because the ν and$\overline v $ interactions are on nuclei, suitable corrections for nuclear effects have been taken into account. In the framework of the «usual»V −A theory, by assuming for the axial form factor the dipolar formFA(q2)=1.23/(1 +q2/MA/2)2, our data have been fitted to the differential cross-section dσ/dq2 integrated over the ν and$\overline v $ energy spectra and to the total cross-sectionσeltot as a function of the ν,$\overline v $ energy to determine the best value for the parameterMA.
Published: 1977
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31. Topology of hadronic e+e− annihilation events at 22 and 34 GeV CM energy

Author: M. J. Schachter, J. J. Veillet, R. Aleksan, Jean-Francois Grivaz, W. De Boer, A. Klarsfeld, P. Grosse-Wiesmann, L. Moss, C. Kiesling, S. Jadach, G. Grindhammer, F. Covacs, Ch. Chen, D. Chrobaczek, J. P. Pansart, G. Schmidt, R. Kotthaus, A. Snyder, B. Gunderson, M. Rivoal, F. Kapusta, H. Randoll, H. Schneider, S. Banerjee, G. Cozzika, F. Pierre, G. Hopp, J. Bouchez, Y. Ducros, U. Mallik, F. Laplanche, A. Gaidot, G. Flügge, D. Lüers, Y. Lavagne, F. Le Diberder, H. Lierl, Horst Oberlack, H. Müller, Peter Schacht, Daniel Fournier, V. Schröder, H. Küster, B. Grossetete, J. Bodenkamp, J. Pamela, R. George, A. Weitsch, G. Buschhorn, M. Davier, H. Sindt, J. H. Field, H. J. Behrend, M. Goldberg, H. Steiner, W. Fues, V. Journé, J. Engler, J. Haissinski, W. D. Apel, G. Carnesecchi, T. Meyer, U. Kruse, G. London, D. C. Fries, U. Gümpel, A. Cordier, and Luc Poggioli
Subjects: Physics, Quantum chromodynamics, Quark, Nuclear and High Energy Physics, Particle physics, Annihilation, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Bremsstrahlung, Parton, Topology, Gluon, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract: The topology of hadronic e + e − annihilation events has been analysed using the sphericity tensor and a cluster method. Comparison with quark models including gluon bremsstrahlung yields good agreement with the data. The strong-coupling constant is determined in 1st order QCD to be α S =0.19±0.04 (stat) ± 0.04 (syst.) at 22 GeV and α S =0.16 ±0.02± 0.03 at 34 GeV. The differential cross section with respect to the energy fraction carried by the most energetic parton agrees with the prediction of QCD, but cannot be reproduced by a scalar gluon model. These results are stable against variations of the transverse momentum distribution of the fragmentation function within the quoted errors.
Published: 1982
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32. Search for neutrino oscillations in 'Gargamelle' at SPS

Author: C. Matteuzzi, M.T. Fogli-Muciaccia, G. Carnesecchi, Ph. Heusse, Donatella Cavalli, F. Romano, M. Willutzky, S. Ragazzi, M. Rollier, N. Armenise, A. Pullia, C. Pascaud, M. Haguenauer, J.P. Vialle, and S. Bonetti
Subjects: Nuclear physics, Physics, Massless particle, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Gargamelle, Elementary particle, Fermion, Neutrino, Neutrino oscillation, Particle Physics - Experiment, Lepton
Abstract: The ν events collected in “Gargamelle” exposed at the CERN SPS wide band beam are reanalyzed to search for possible ν μ → ν e oscillations. No effect is found and an upper limit of 1.2 eV at 68% c.l. is determined for the mass parameters Δm = (m 1 2 − m 2 2 ) 1 2 in the case of maximum neutrino mixing. A limit on the ν μ → ν τ transition probability is also quoted, but the sensitivity is smaller.
Published: 1981
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33. High energy elastic numu scattering off electrons in Gargamelle

Author: P. Alibran, L. Zanotti, G. Carnesecchi, A.M. Lutz, A. Blondel, M. Willutzky, E. Fiorini, M. J. Price, Ph. Heusse, C. Pascaud, A. Pullia, P. Lundborg, J. Sleeman, M.T. Fogli-Muciaccia, C. Matteuzzi, O. Erriquez, M. Haguenauer, B. Pattison, Salvatore Nuzzo, J. Gillespie, S. Natali, F. Romano, F. Jacquet, J.P. Vialle, U. Nguyen-Khac, S. Bonetti, J. Bourotte, B. Degrange, E. Bellotti, G. Bonneaud, P. Musset, D. Blum, N. Armenise, Donatella Cavalli, M. Rollier, and C. Arnault
Subjects: Nuclear physics, Elastic scattering, Physics, Nuclear and High Energy Physics, Particle physics, Neutral current, Gargamelle, Bubble chamber, Elementary particle, Neutrino, Charged current, Particle Physics - Experiment, Lepton
Abstract: The reaction nu /sub mu /e to nu /sub mu /e has been investigated in the bubble chamber Gargamelle exposed to the wide-band neutrino beam of the CERN SPS. Nine electron candidates of which 0.5 are expected to be background, were found in a total statistics available of 64000 charged current neutrino events. Results are given in terms of vector and axial vector coupling constants. The present results agree with the standard SU(2)(X)U(1) model for current values of sin/sup 2/ Theta /sub w/. A critical comparison is made with the previous result based on statistics which were smaller by a factor 2.6 and which led to a rather higher cross section. (10 refs).
Published: 1979

34. The influence of fragmentation models on the determination of the strong coupling constant in $e^+e^-$ annihilation into hadrons

Author: S. Banerjee, F. Kovacs, G. Cozzika, G. Flügge, D. Lüers, J. J. Veillet, R. Aleksan, J. Bodenkamp, G. Grindhammer, R. George, Y. Lavagne, V. Schröder, D. Chrobaczek, G. Schmidt, S. Jadach, B. Grossetete, O. Hamon, Ch. Chen, H. Schneider, F. Pierre, F. Kapusta, H. Sindt, P. Colas, Peter Schacht, H. Küster, H. J. Behrend, M. Goldberg, G. D'Agostini, K. Gamerdinger, W. D. Apel, F. Le Diberder, P. Grosse-Wiesmann, A. Klarsfeld, R. Kotthaus, J. Bouchez, Jean-Francois Grivaz, J. P. Pansart, J. Engler, J. Haissinski, Y. Ducros, H. Randoll, C. Kiesling, M. Davier, U. Mallik, H. Fenner, G. Hopp, H. Müller, M. J. Schachter, J. H. Field, A. Gaidot, Horst Oberlack, W. Fues, V. Journé, B. Gunderson, M. Rivoal, Daniel Fournier, H. Lierl, G. Buschhorn, G. London, D. C. Fries, W. De Boer, Luc Poggioli, G. Carnesecchi, U. Kruse, F. Laplanche, A. Cordier, J. Pamela, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CELLO
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, Hadron, 01 natural sciences, Nuclear physics, Fragmentation (mass spectrometry), 0103 physical sciences, Quark–gluon plasma, Strong coupling, High Energy Physics::Experiment, 010306 general physics
Abstract: Hadronic events obtained with the CELLO detector at PETRA were compared with first-order QCD predictions using two different models for the fragmentation of quarks and gluons, the Hoyer model and the Lund model. Both models are in reasonable agreement with the data, although they do not completely reproduce the details of many distributions. Several methods have been applied to determine the strong coupling constant α S . Although within one model the value of α S varies by 20% among the different methods, the values determined using the Lund model are 30% or more larger (depending on the method used) than the values determined with the Hoyer model. Our results using the Hoyer model are in agreement with previous results based on this approach.
Published: 1983

35. On the model dependence of the determination of the strong coupling constant in second order QCD from $e^+e^-$ annihilation into hadrons

Author: M. Krüger, Luc Poggioli, A. Cordier, Eduardo Ros, O. Achterberg, Y. Lavagne, G. Flügge, D. Lüers, Daniel Fournier, V. Schröder, B. Grossetete, F. Le Diberder, R. George, O. Hamon, Peter Schacht, H. Küster, G. Hopp, H. Lierl, F. Pierre, G. Grindhammer, R. Pain, G. D'Agostini, M. Rivoal, G. Cozzika, G. Bonneaud, J. Bouchez, A. Gaidot, K. Gamerdinger, G. Buschhorn, Jean-Francois Grivaz, M. J. Schachter, P. Colas, G. Carnesecchi, Horst Oberlack, R. Kotthaus, B. Gunderson, H. J. Behrend, Patrick Jarry, C. Kiesling, W. Fues, H. Fenner, V. Journé, W. De Boer, F. Kovacs, Y. Ducros, H. Schneider, G. London, U. Mallik, D. C. Fries, J. J. Veillet, F. Laplanche, J. H. Field, J. P. Pansart, J. Engler, H. Müller, R. Aleksan, P. Grosse-Wiesmann, Th. Henkes, G. Schmidt, H. Randoll, M. Davier, F. Kapusta, M. Goldberg, J. Haissinski, U. Kruse, H. Sindt, B. Forstbauer, W. D. Apel, J. Pamela, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CELLO
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Annihilation, Chiral perturbation theory, 010308 nuclear & particles physics, High Energy Physics::Lattice, Electron–positron annihilation, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, Detector, 01 natural sciences, Hadronization, Nuclear physics, 0103 physical sciences, Quark–gluon plasma, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: Hadronic events obtained with the CELLO detector at PETRA are compared with second order QCD predictions using different models for the fragmentation of quarks and gluons into hadrons. We find that the model dependence in the determination of the strong coupling constant persists when going from first to second order QCD calculations.
Published: 1984

36. Study of neutrino proton elastic scattering in the 'Gargamelle' freon experiment

Author: M. Pohl, Francesco Romano, G. Carnesecchi, C. Pascaud, C. Longuemare, L. Welch, T. W. Jones, Jean Pierre Vialle, P. Musset, V. Brisson, Hubert Mulkens, P. Petiau, Jean Louis J.L. Riester, G. R. Bonneaud, M. Dewit, Jean J. Alitti, G. Myatt, Amelie Lutz, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette
Subjects: Physics, Elastic scattering, Nuclear and High Energy Physics, Particle physics, Freon, Proton, Neutral current, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear physics, Cross section (physics), Gargamelle, Neutrino, Charged current, Particle Physics - Experiment
Abstract: The cross section ratio of the elastic neutral current reaction νp→νp to the quasi-elastic charged current reaction νn→μ−p has been measured in the kinematical region 0.3⩽q2⩽1.0 (GeV/c)2. The measured value is RM=0.17±0.08. Model dependent corrections are applied, especially for νn→νn contamination, and the result is compared to various models.
Published: 1977

37. Observation and study of the nu$_{mu}$e- --> nu$_{mu}$e- reaction in Gargamelle at high energy

Author: D. Blum, J. Sleeman, C. Matteuzzi, F. Romano, Salvatore Nuzzo, N. Armenise, L. Zanotti, Donatella Cavalli, M. Rollier, M. Haguenauer, P. Lundborg, J. Bourotte, P. Alibran, Ph. Heusse, E. Bellotti, B. Pattison, M.T. Fogli-Muciaccia, B. Degrange, S. Natali, O. Erriquez, F. Jacquet, A. Pullia, U. Nguyen-Khac, A.M. Lutz, G. Bonneaud, P. Musset, E. Fiorini, G. Conforto, C. Pascaud, J. Gillespie, J.P. Vialle, G. Carnesecchi, M. Willutzky, S. Bonetti, and A. Blondel
Subjects: Physics, Nuclear physics, Elastic scattering, Coupling constant, Nuclear and High Energy Physics, Gargamelle, Bubble chamber, Elementary particle, Neutrino, Nuclear Experiment, Pseudovector, Particle Physics - Experiment, Lepton
Abstract: A search for the reaction nu /sub mu /+e/sup -/ to nu /sub mu /+e/sup -/ was made in the bubble chamber Gargamelle exposed to the wide- and neutrino beam of the CERN-SPS. Ten isolated e/sup -/ were found above 2 GeV energy. All of them were emitted at an angle smaller than 1.5 degrees with respect to the beam. The background is 0.2+or-0.2 events. Results on cross section are given in terms of vector and axial vector coupling constants. A comparison is made with the standard SU(2)(X)U (1) model: no agreement is found with the currently accepted value of the mixing angle. Possible sources other than the above reaction are discussed. (10 refs).
Published: 1978

38. Experimental study of the hadronic photon structure function

Author: R. Kotthaus, F. Kovacs, F. Laplanche, O. Hamon, G. Grindhammer, Y. Lavagne, J. J. Veillet, R. Aleksan, P. Grosse-Wiesmann, P. Colas, A. Gaidot, Horst Oberlack, M. Rivoal, B. Grossetete, H. Schneider, F. Pierre, S. Banerjee, W. D. Apel, J. Bodenkamp, R. George, A. Cordier, H. Randoll, M. Davier, Jean-Francois Grivaz, C. Kiesling, G. Carnesecchi, G. Schmidt, H. Fenner, Luc Poggioli, G. Cozzika, J. Bouchez, Y. Ducros, U. Mallik, J. H. Field, H. Müller, M. Goldberg, Peter Schacht, H. Küster, U. Kruse, H. Sindt, G. D'Agostini, M. J. Schachter, J. Pamela, K. Gamerdinger, G. Hopp, J. Haissinski, G. London, J. P. Pansart, J. Engler, W. Fues, D. C. Fries, G. Flügge, D. Lüers, V. Journé, V. Schröder, F. Kapusta, U. Gümpel, F. Le Diberder, H. Lierl, B. Gunderson, W. De Boer, G. Buschhorn, Daniel Fournier, H. J. Behrend, Starita, Sabine, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CELLO
Subjects: Physics, Quantum chromodynamics, Quark, Nuclear and High Energy Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Parton, 01 natural sciences, Photon structure function, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: We have measured at PETRA the process e γ → e + hadrons at an average Q 2 value of 9 GeV 2 / c 2 . The total number of observed events attributed to this process is 215. Our data are compared to calculations based on the estimation of the photon structure function F 2 in the quark parton model and in QCD.
Published: 1983

39. Study of neutrino-induced dimuon events in gargamelle at CERN-SPS

Author: B. Pattison, S. Natali, G. Carnesecchi, M. Willutzky, S. Ragazzi, D. Blum, C. Pascaud, N. Armenise, A. Pullia, P. Alibran, J. Bourotte, J. Gillespie, P. Lundborg, Donatella Cavalli, H. Sletten, E. Bellotti, J.P. Vialle, Ph. Heusse, F. Romano, S. Bonetti, M. Haguenauer, A.M. Lutz, B. Degrange, H. Burmeister, L. Zanotti, Gilbert Poulard, O. Erriquez, F. Jacquet, J. Sleeman, C. Matteuzzi, M. Rollier, G. Conforto, C. Longuemare, G. Bonneaud, P. Musset, A. Blondel, U. Nguyen-Khac, M.T. Fogli-Muciaccia, Salvatore Nuzzo, Heyd, Yvette, Institut de Recherches Subatomiques (IReS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, Missing energy, Meson, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Hadron, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear physics, Particle decay, Gargamelle, Neutrino, Particle Physics - Experiment
Abstract: This letter reports a study of 117 opposite-sign and 41 like-sign dimuons, in a wide-band neutrino exposure of Gargamelle at CERN SPS. No signal is found in the μ − μ − channel. The μ − μ + channel is found to be dominated by D-meson production and decay. There is evidence in these events for missing energy which may be interpreted as an unseen neutrino. The V 0 multiplicities, K 0 /event=0.53 −0.20 +0.25 and Λ /event=0.03 −0.04 +0.06 show only evidence for charmed meson production. Information on the D-meson fragmentation function is presented. In a specific model, a rate σ (μ − μ + ) σ(μ − ) =(0.72±0.14×10 −2 is found, independent of the energy. An investigation of these events for visible D-decays sets a limit on the life-time τ D −12 s at 90% C.L.
Published: 1979

40. Inclusive production of electrons and muons in multihadronic events at Petra

Author: F. Kovacs, R. Kotthaus, W. Fues, H. J. Behrend, G. London, G. Schmidt, D. C. Fries, P. Colas, V. Journé, J. J. Veillet, O. Hamon, G. Cozzika, R. Aleksan, J. P. Pansart, J. Pamela, M. Rivoal, J. Engler, H. Randoll, F. Pierre, M. Davier, W. De Boer, H. Schneider, Y. Lavagne, J. H. Field, Y. Ducros, Daniel Fournier, G. Grindhammer, U. Mallik, B. Grossetete, M. Goldberg, H. Müller, G. Hopp, M. J. Schachter, Peter Schacht, H. Küster, H. Sindt, F. Laplanche, H. Lierl, G. D'Agostini, K. Gamerdinger, Jean-Francois Grivaz, A. Gaidot, J. Haissinski, Horst Oberlack, W. D. Apel, B. Gunderson, C. Kiesling, P. Grosse-Wiesmann, H. Fenner, A. Cordier, J. Bouchez, G. Carnesecchi, U. Kruse, F. Kapusta, Luc Poggioli, G. Buschhorn, G. Flügge, D. Lüers, V. Schröder, R. George, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CELLO
Subjects: Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Branching fraction, Elementary particle, Electron, 01 natural sciences, Nuclear physics, 0103 physical sciences, Energy spectrum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Production (computer science), 010306 general physics, Engineering (miscellaneous)
Abstract: The production of prompt leptons at PETRA has been measured for c.m. energies of 14, 22 and 34 GeV. The rate of prompt electrons and muons is presented, including a determination of the semileptonic branching ratio of thec andb quarks. We obtain $$\begin{gathered} B(c \to \mu vX) = 12.3 \pm 2.9(stat) \pm 3.9(syst.){\raise0.5ex\hbox{$\scriptstyle 0$}\kern-0.1em/\kern-0.15em\lower0.25ex\hbox{$\scriptstyle {0,}$}} \hfill \\ B(b \to \mu vX) = 8.8 \pm 3.4(stat) \pm 3.5(syst.){\raise0.5ex\hbox{$\scriptstyle 0$}\kern-0.1em/\kern-0.15em\lower0.25ex\hbox{$\scriptstyle {0,}$}} \hfill \\ B(b \to evX) = 14.1 \pm 5.8(stat) \pm 3.0(syst.){\raise0.5ex\hbox{$\scriptstyle 0$}\kern-0.1em/\kern-0.15em\lower0.25ex\hbox{$\scriptstyle {0.}$}} \hfill \\ \end{gathered} $$
Published: 1983

41. Limits on spin 0 bosons in e+e- annihilation up to 45.2 GeV CM energy

Author: B. Gunderson, O. Hamon, Gideon Bella, Daniel Fournier, Alan Campbell, Luc Poggioli, F. Pierre, Jean-Francois Grivaz, R. Pain, J. D. Burger, F. Kapusta, G. Buschhorn, D. Hendry, G. Hopp, Eduardo Ros, G. G. Winter, I. O. Skillicorn, W. D. Apel, Y. Lavagne, M. Poppe, B. Forstrauer, J. Grunhaus, Patrick Jarry, G. Bonneaud, H. J. Behrend, G. Cozzika, J. Knapp, G. Grindhammer, G. Carnesecchi, G. Schmidt, J. Pamela, R. Kotthaus, G. Flügge, D. Lüers, H. Lierl, Peter Schacht, H. Küster, W. Fues, J. M. Scarr, P. J. Bussey, V. Schröder, H. Spitzer, G. D'Agostini, R. George, M. Goldberg, V. Journé, Th. Henkes, K. Gamerdinger, F. Lediberder, K. H. Ranitzsch, J. P. Pansart, J. Engler, W. De Boer, Jean-Arcady Meyer, H. Randoll, D. C. Fries, M. Davier, M. Rivoal, J. Bouchez, W. Zimmermann, M. Gaspero, M. Krüger, J. Haissinski, Gideon Alexander, H. Schneider, A. Cordier, C. Kiesling, H. Fenner, U. Timm, J. H. Field, F. Kovacs, J. J. Veillet, R. Aleksan, F. Ould Saada, B. Stella, H. Sindt, Y. Gnat, A. Gaidot, Horst Oberlack, P. Grosse-Wiesmann, Y. Ducros, U. Mallik, H. Müller, G. Franke, Kevin M. Smith, L. Criegee, J. B. Dainton, O. Achterberg, and P. Colas
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Range (particle radiation), Annihilation, Radiative transfer, High Energy Physics::Experiment, Spin (physics), Energy (signal processing), Boson
Abstract: We have studied the reactions e + e − → e + e − , e + e − → γγ , e + e − → μ + μ − , and e + e − → τ + τ − in the centre-of-mass (CM) energy range from 39.8 to 45.2 GeV using the CELLO detector at PETRA. Upper limits on the partial widths for new spin 0 bosons with masses both within and above the energy range covered are determined. No evidence for contributions of such new particles has been observed up to the highest PETRA energies in a model independent way. Under the assumptions of recently suggested models relating the existence of spin 0 bosons to the radiative width Γ τ of the Z 0 we exclude such bosons at the 95% confidence level for masses below the Z 0 -mass if Γ τ > 20 MeV.

42. Search for new heavy quarks in e+e- collisions up to 46.78 GeV CM energy

Author: M. Krüger, G. Grindhammer, G. Buschhorn, Daniel Fournier, J. P. Pansart, J. Engler, J. Pamela, G. Franke, Alan Campbell, J. Bouchez, Kevin M. Smith, F. Kovacs, J. J. Veillet, R. Aleksan, O. Hamon, G. Hopp, Gideon Bella, H. Lierl, R. Pain, U. Timm, Patrick Jarry, J. H. Field, J. Grunhaus, G. Schmidt, F. Pierre, L. Criegee, J. B. Dainton, O. Achterberg, Y. Gnat, B. Gunderson, R. George, W. De Boer, Jean-Francois Grivaz, M. Rivoal, D. C. Fries, C. Kiesling, Jean-Arcady Meyer, H. Fenner, P. Grosse-Wiesmann, W. Zimmermann, A. Gaidot, P. Colas, M. Gaspero, I. O. Skillicorn, M. Goldberg, Horst Oberlack, F. Ould Saada, B. Stella, J. Büger, Y. Ducros, R. Rotthaus, U. Mallik, H. Müller, Th. Henkes, P. J. Bussey, W. Fues, H. J. Behrend, G. Carnesecchi, H. Sindt, J. Haissinski, V. Journé, H. Spitzer, G. G. Winter, K. H. Ranitzsch, J. M. Scarr, Luc Poggioli, G. Bonneaud, D. Hendry, G. Flügge, D. Lüers, Y. Lavagne, V. Schröder, H. Randoll, M. Davier, Gideon Alexander, H. Schneider, A. Cordier, Peter Schacht, H. Küster, G. D'Agostini, K. Gamerdinger, J. Knapp, G. Cozzika, Eduardo Ros, F. Kapusta, F. Le Diberder, B. Forstbauer, W. D. Apel, and M. Poppe
Subjects: Systematic error, Physics, Quark, Nuclear and High Energy Physics, Particle physics, Annihilation, Branching fraction, Electron–positron annihilation, Hadron, Flavour, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Ground state
Abstract: The total e+e− annihilation onto hadron has been measured at CM energies between 33.00 and 36.72 GeV and between 38.66 and 46.78 GeV in steps of 20 and 30 MeV respectively. The average of the ratio R=σ(e+e−→hadrons)/ σ is 〈R〉=3.85±0.12 and 〈R〉=4.04±0.10 for the two energy ranges. The systematic error on 〈R〉 is 0.31. Both values are consistent with the expectation for the known coloured quarks u, d, s, c and b. No evidence was found for the production of new quarks. If the largest fluctuation in R is interpreted as a narrow resonance, it corresponds to a product of the electronic width and the hadronic branching ratio ΓeeBhad>2.9 keV at the 95% confidence level, well below the value expected for the toponium vector ground state with charge 2 3 e . The observed number of aplanar final states rules out the continuum production of a a new heavy flavour with pointlike cross section up to a CM energy of 45.4 GeV for a quarck charge of 1 3 e . and up to 46.6 GeV for 2 3 e at the 95% confidence level.

43. In vitro activity of ceftaroline and ceftobiprole against methicillin-resistant Staphylococcus aureus with decreased susceptibility to vancomycin isolated in paediatric patients.

Author: Carnesecchi G, Lobello R, Liggieri L, Palmero C, Pescetto L, Morelli P, Castagnola E, and Bandettini R
Subjects: Child, Humans, Microbial Sensitivity Tests methods, Staphylococcal Infections microbiology, Ceftaroline, Anti-Bacterial Agents pharmacology, Cephalosporins pharmacology, Methicillin-Resistant Staphylococcus aureus drug effects, Staphylococcal Infections drug therapy, Vancomycin pharmacology
Abstract: Minimal inhibitory concentrations (MIC, mg/l) of ceftaroline and ceftobiprole were evaluated over 70 methicillin-resistant Staphylococcus aureus (MRSA) strains with vancomycin MIC ≥1 isolated in a paediatric hospital. The proportion of non-wild-type strains (MIC > epidemiological cut off) was 18% for ceftobiprole and 64% for ceftaroline. Only 1.4% of strains was resistant to ceftobiprole, and none to ceftaroline. These results are worrisome, since show the presence of non-negligible proportions of MRSA strains with high MIC values for ceftaroline and ceftobiprole in a setting where both drugs were never used.
Published: 2018
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44. Evidence for oesophageal and anorectal involvement in very early systemic sclerosis (VEDOSS): report from a single VEDOSS/EUSTAR centre.

Author: Lepri G, Guiducci S, Bellando-Randone S, Giani I, Bruni C, Blagojevic J, Carnesecchi G, Radicati A, Pucciani F, and Marco MC
Subjects: Adult, Anal Canal physiopathology, Anus Diseases etiology, Anus Diseases physiopathology, Early Diagnosis, Esophageal Diseases etiology, Esophageal Diseases physiopathology, Esophageal Sphincter, Lower physiopathology, Female, Humans, Lung physiopathology, Lung Diseases etiology, Lung Diseases physiopathology, Male, Manometry, Microscopic Angioscopy, Middle Aged, Radiography, Raynaud Disease etiology, Rectal Diseases diagnosis, Rectal Diseases etiology, Rectal Diseases physiopathology, Respiratory Function Tests, Scleroderma, Systemic complications, Scleroderma, Systemic physiopathology, Anus Diseases diagnosis, Esophageal Diseases diagnosis, Lung diagnostic imaging, Lung Diseases diagnosis, Scleroderma, Systemic diagnosis
Abstract: Background: The oesophagus is the first gastrointestinal (GI) tract involved in systemic sclerosis (SSc), followed by the anorectum., Objective: Evaluation of oesophageal and anorectal involvement and their correlations in patients with very early diagnosis of SSc (VEDOSS)., Patients and Methods: 59 patients with VEDOSS, evaluated with oesophageal and anorectal manometry and investigated with lung function tests and chest HRCT. Demographic data, oesophageal and anorectal symptoms, Raynaud's phenomenon, autoantibodies, videocapillaroscopy patterns, puffy fingers and digital ulcers were recorded for all patients., Results: In 4 patients oesophageal manometry and in 17 patients anorectal manometry was not performed because of scarce tolerance. Oesophageal peristalsis was absent in 14 patients; its pressure and speed were significantly lower in 41 patients (p<0.001 and p=0.005, respectively). The maximum pressure and mean pressure (Pmax and Pm) of lower oesophageal sphincter were significantly lower (p=0.012 and p=0.024, respectively). Patients with a diffusing capacity of the lung for carbon monoxide<80% presented a hypotonic lower oesophageal sphincter (p=0.008) and an abnormal peristalsis (p<0.001); patients with a diffusing capacity of the lung for carbon monoxide>80% showed only an abnormal peristalsis (<0.001). The anal resting pressure (ARP) at 4.3 cm and 2 cm from anal edge and the anal canal Pm were significantly decreased (p<0.001 and p=0.010, respectively). The maximum voluntary contraction was significantly abnormal in its Pmax and Pm (p=0.017 and p=0.005) and in its duration (p=0.001). In patients with a positive HRCT, the ARP and the canal Pmax and Pm were significantly lower; patients with negative HRCT presented only an abnormal ARP., Conclusions: In patients with VEDOSS, oesophageal and anorectal disorders are frequently detected, showing that very early SSc is characterised by GI involvement., (Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.)
Published: 2015
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45. Lung ultrasound for the screening of interstitial lung disease in very early systemic sclerosis.

Author: Barskova T, Gargani L, Guiducci S, Randone SB, Bruni C, Carnesecchi G, Conforti ML, Porta F, Pignone A, Caramella D, Picano E, and Cerinic MM
Subjects: Female, Humans, Male, Middle Aged, Ultrasonography, Early Diagnosis, Lung Diseases, Interstitial diagnostic imaging, Lung Diseases, Interstitial etiology, Scleroderma, Systemic complications, Scleroderma, Systemic diagnostic imaging
Abstract: Background: A high percentage of patients with systemic sclerosis (SSc) develop interstitial lung disease (ILD) during the course of the disease. Promising data have recently shown that lung ultrasound (LUS) is able to detect ILD by the evaluation of B-lines (previously called ultrasound lung comets), the sonographic marker of pulmonary interstitial syndrome., Objective: To evaluate whether LUS is reliable in the screening of ILD in patients with SSc., Methods: Fifty-eight consecutive patients with SSc (54 women, mean age 51±14 years) who underwent a high resolution CT (HRCT) scan of the chest were also evaluated by LUS for detection of B-lines. Of these, 32 patients (29 women, mean age 51±15 years) fulfilled the criteria for a diagnosis of very early SSc., Results: At HRCT, ILD was detected in 88% of the SSc population and in 41% of the very early SSc population. A significant difference in the number of B-lines was found in patients with and without ILD on HRCT (57±53 vs 9±9; p<0.0001), with a concordance rate of 83%. All discordant cases were false positive at LUS, providing a sensitivity and negative predictive value of 100% in both SSc and very early SSc., Conclusions: ILD may be detected in patients with very early SSc. The presence of B-lines at LUS examination correlates with ILD at HRCT. LUS is very sensitive for detecting ILD even in patients with a diagnosis of very early SSc. The use of LUS as a screening tool for ILD may be feasible to guide further investigation with HRCT.
Published: 2013
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