Bose-Einstein correlations in charged current muon-neutrino interactions in the NOMAD experiment at CERN

Astier, P.; Autiero, D.; Baldisseri, A.; Baldo, Massimilla; Banner, M.; Bassompierre, G.; Benslama, K.; Besson, N.; Bird, I.; Blumenfeld, B.; Bobisut, Furio; Bouchez, J.; Boyd, S.; Bueno, A.; Bunyatov, S.; Camilleri, L.; Cardini, A.; Cattaneo, P. W.; Cavasinni, V.; CERVERA VILLANUEVA, A.; Challis, R. C.; Chukanov, A.; Collazuol, Gianmaria; Conforto, G.; Conta, C.; Contalbrigo, M.; Cousins, R.; Daniels, D.; Degaudenzi, H.; DEL PRETE, T.; DE SANTO, A.; Dignan, T.; DI LELLA, L.; Silva, E. DO COUTO E.; Dumarchez, J.; Ellis, M.; Feldman, G. J.; Ferrari, R.; Ferrere, D.; Flaminio, V.; Fraternali, M.; Gaillard, J. M.; Gangler, E.; Geiser, A.; Geppert, D.; Gibin, Daniele; Gninenko, S.; Godley, A.; GOMEZ CADENAS, J. J.; Gosset, J.; Gossling, C.; Gouanere, M.; Grant, A.; Graziani, G.; Guglielmi, A.; Hagner, C.; Hernando, J.; Hubbard, D.; Hurst, P.; Hyett, N.; Iacopini, E.; Joseph, C.; Juget, F.; Kent, N.; Kirsanov, M.; Klimov, O.; Kokkonen, J.; Kovzelev, A.; Krasnoperov, A.; Lacaprara, S.; Lachaud, C.; Lakic, B.; Lanza, A.; LA ROTONDA, L.; Laveder, Marco; LETESSIER SELVON, A.; Levy, J. M.; Linssen, L.; Ljubicic, A.; Long, J.; Lupi, A.; Lyubushkin, V.; Marchionni, A.; Martelli, F.; Mechain, X.; Mendiburu, J. P.; Meyer, J. P.; Mezzetto, M.; Mishra, S. R.; Moorhead, G. F.; Naumov, D.; Nedelec, P.; Nefedov, Y. U.; NGUYEN MAU, C.; Orestano, D.; Pastore, F.; Peak, L. S.; Pennacchio, E.; Pessard, H.; Petti, R.; Placci, A.; Polesello, G.; Pollmann, D.; Polyarush, A.; Popov, B.; Poulsen, C.; Rebuffi, L.; Rico, J.; Riemann, P.; Roda, C.; Rubbia, A.; Salvatore, F.; Schahmaneche, K.; Schmidt, B.; Schmidt, T.; Sconza, Andrea; Sevior, M.; Sillou, D.; Soler, F. J. P.; Sozzi, G.; Steele, D.; Stiegler, U.; Stipcevic, M.; Stolarczyk, T. H.; TAREB REYES, M.; Taylor, G. N.; Tereshchenko, V.; Toropin, A.; Touchard, A. M.; Tovey, S. N.; Tran, M. T.; Tsesmelis, E.; Ulrichs, J.; Vacavant, L.; VALDATA NAPPI, M.; Valuev, V.; Vannucci, F.; Varvell, K. E.; Veltri, M.; Vercesi, V.; VIDAL SITJES, G.; Vieira, J. M.; Vinogradova, T.; Weber, F. V.; Weisse, T.; Wilson, F. F.; Winton, L. J.; Yabsley, B. D.; Zaccone, H.; Zei, R.; Zuber, K.; Zuccon, P.

doi:10.1016/j.nuclphysb.2004.03.011

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)(-0.06)(+0,09)(sys) fm and for the chaoticity parameter the value lambda = 0.40 +/- 0.03(stat)(-0.06)(+0.01) (sys). Using the Kopylov-Podgoretskii parametrization yields R-KP = 2.07 +/- 0.04(stat)(-0.14)(+0.01) (sys) fm and lambda(KP) = 0.29 +/- 0.06(stat)(-0.04)(+0,01) (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 comoving 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.