Bose-Einstein Correlations in Charged Current Muon-Neutrino Interactions in the NOMAD Experiment at CERN

P. Astier (1) , D. Autiero , A. Baldisseri , M. Baldo-Ceolin , M. Banner (1) , G. Bassompierre (2) , K. Benslama , N. Besson , I. Bird , B. Blumenfeld , F. Bobisut , J. Bouchez , S. Boyd , A.G. Bueno , S. Bunyatov , L.L. Camilleri , A. Cardini , P.W. Cattaneo , V. Cavasinni , A. Cervera-Villanueva , R.C. Challis , A. Chukanov , G. Collazuol , G. Conforto , C. Conta , M. Contalbrigo , R. Cousins , D. Daniels , H. Degaudenzi , T. Del Prete , A. De Santo , T. Dignan , L. Di Lella , E. Do Couto e Silva , J. Dumarchez (1) , M. Ellis , G.J. Feldman , R. Ferrari , D. Ferrère , V. Flaminio , M. Fraternali , J.M. Gaillard (2) , E. Gangler (1) , A. Geiser , D. Geppert , D. Gibin , S.N. Gninenko , A. Godley , J.J. Gómez-Cadenas , J. Gosset , C. Gössling , M. Gouanère (2) , A. Grant , G. Graziani , A.M. Guglielmi , C. Hagner , J. Hernando , D. Hubbard , P. Hurst , N. Hyett , E. Iacopini , C. Joseph , F. Juget , N. Kent , M.M. Kirsanov , O. Klimov , J. Kokkonen , A. Kovzelev , A. Krasnoperov (2) , S. Lacaprara , C. Lachaud (1) , B. Lakic , A. Lanza , L. La Rotonda , M. Laveder , A. Letessier-Selvon (1) , J.M. Lévy (1) , L. Linssen , A. Ljubicic , J. Long , A. Lupi , V.V. Lyubushkin , A. Marchionni , F. Martelli , X. Méchain , J.P. Mendiburu (2) , J.P. Meyer , M. Mezzetto , S.R. Mishra , G.F. Moorhead , D.V. Naumov , P. Nédélec (2) , Yu A. Nefedov , C. Nguyen-Mau , D. Orestano , F. Pastore , L.S. Peak , E. Pennacchio , H. Pessard (2) , R. Petti , A. Placci , G. Polesello , D. Pollmann , A. Yu Polyarush , B. Popov (1) , C. Poulsen , L. Rebuffi , J. Rico , P. Riemann , C. Roda , A. Rubbia , F. Salvatore , B. Schmidt , T. Schmidt , A. Sconza , M. Sevior , D. Sillou (2) , F. J. P. Soler , G. Sozzi , D. D. Steele , U. Stiegler , M. Stipcevic , T. Stolarczyk , M. Tareb-Reyes , G.N. Taylor , V.V. Tereshchenko , A.N. Toropin , A.M. Touchard (1) , S.N. Tovey , M.T. Tran , E. Tsesmelis , J. Ulrichs , L. Vacavant , M. Valdata-Nappi , V. Yu Valuev , F. Vannucci (1) , K.E. Varvell , M. Veltri , V. Vercesi , G. Vidal-Sitjes , J.M. Vieira , T.G. Vinogradova , F.V. Weber , T. Weisse , F.F. Wilson , L.J. Winton , B.D. Yabsley , H. Zaccone , R. Zei , K. Zuber , P. Zuccon

1 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
2 LAPP - Laboratoire d'Annecy de Physique des Particules

Bose-Einstein Correlations in one and two dimensions have been studied, with high statistics, in charged current muon-neutrino interaction events collected with the NOMAD detector at CERN. In one dimension the Bose-Einstein effect has been analyzed with the Goldhaber and the Kopylov-Podgoretskii phenomenological parametrizations. The Goldhaber parametrization gives the radius of the pion emission region R_G = 1.01+/-0.05(stat)+0.09-0.06(sys) fm and for the chaoticity parameter the value lambda = 0.40+/-0.03(stat)+0.01-0.06(sys). Using the Kopylov-Podgoretskii parametrization yields R_KP = 2.07+/-0.04(stat)+0.01-0.14(sys) fm and lambda_KP = 0.29+/-0.06(stat)+0.01-0.04(sys). Different parametrizations of the long-range correlations have been also studied. The two-dimensional shape of the source has been investigated in the longitudinal co-moving frame. A significant difference between the transverse and the longitudinal dimensions is observed. The high statistics of the collected sample allowed the study of the Bose-Einstein correlations as a function of rapidity, charged particle multiplicity and hadronic energy. A weak dependence of both radius and chaoticity on multiplicity and hadronic energy is found.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

P. Astier, D. Autiero, A. Baldisseri, M. Baldo-Ceolin, M. Banner, et al.. Bose-Einstein Correlations in Charged Current Muon-Neutrino Interactions in the NOMAD Experiment at CERN. Nuclear Physics B, 2004, 686, pp.3-28. ⟨10.1016/j.nuclphysb.2004.03.011⟩. ⟨in2p3-00024015⟩