Measurements of Cross Sections and Charged Pion Spectra in Proton-Carbon Interactions at 31 GeV/c

N Abgrall,X Garrido,Mark J Roth,B Andrieu,T Hasegawa,T Cetner,Michael A Unger, O Busygina,P Staszel,Minoru Tada,D Kielczewska,A Bravar,Alexander Kurepin,H Hakobyan,Marek Gazdzicki,A Marcinek,A Meregaglia,F Guber,Kyung Un Choi,M Slodkowski,A Ferrero,B Rossi,J Stepaniak,J Dumarchez,T Nakadaira,L S Esposito,T Anticic,N G Antoniou, S Igolkin,M Mackowiak, Lyubushkin,A Marchionni,E Rondio,D Rohrich,Z Majka, M Ravonel,G Stefanek,D Kolev,W Dominik,D P Kikola,A S Kapoyannis,J Brzychczyk,R Ulrich,Y Ivanov,W Peryt,A Wilczek,S Pu Lawski,S A Bunyatov,T Susa,J Argyriades, Marin,T Sekiguchi,R Planeta,M Rybczynski,A Asryan,W K Brooks,T Matulewicz, A Taranenko,A Malakhov, M Posiadala,A Robert,P Christakoglou,Z Fodor,M Kirejczyk,M Golubeva,A Ereditato, O Kochebina,G L Melkumov,A Sadovsky, G Vesztergombi,T Palczewski, G Palla,W Zipper,K Nishikawa, J G Yi, P Szaik,A Aduszkiewicz,W Rauch, P Seyboth,A Bubak, O Petukhov, Matveev,I C Maris, P A Naumenko,A S Ivanov,J Lagoda,St Mrowczynski, Vechernin, R Renfordt, J Pluta,H Strobele, A Blondel,K Kadija,Simon J Murphy,A Ivashkin, E Skrzypczak,S Kuleshov,L Boldizsar,A Fulop, A Rubbia,Joe B Blumer,Peijung Chung,S Kowalski,I K Yoo,N Katrynska,G Feofilov,A Laszlo,A N Sissakian,S Di Luise,J Kisiel, A Wojtaszek,V Kondratiev, C Strabel,M Szuba,N Davis,T Czopowicz,B Popov, R Engel,K Grebieszkow,R Lacey,A Korzenev,M Messina,V Kolesnikov,Melina C Vassiliou,F K Diakonos, M Bogusz,Z W Lodarczyk,T Kobayashi,Apostolos Panagiotou,R Tsenov,Ji Hyun Kim,K Sakashita, A Grzeszczuk,A S Sorin,B Baatar,Masaru Shibata

PHYSICAL REVIEW C（2011）

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摘要

Interaction cross sections and charged pion spectra in p + C interactions at 31 GeV/c were measured with the large-acceptance NA61/SHINE spectrometer at the CERN SPS. These data are required to improve predictions of the neutrino flux for the T2K long-baseline neutrino oscillation experiment in Japan. A set of data collected during the first NA61/SHINE run in 2007 with an isotropic graphite target with a thickness of 4% of a nuclear interaction length was used for the analysis. The measured p + C inelastic and production cross sections are 257.2 +/- 1.9 +/- 8.9 and 229.3 +/- 1.9 +/- 9.0 mb, respectively. Inclusive production cross sections for negatively and positively charged pions are presented as functions of laboratory momentum in ten intervals of the laboratory polar angle covering the range from 0 up to 420 mrad. The spectra are compared with predictions of several hadron production models.

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