Measurement Of The Production Cross Section Of 31 Gev/C Protons On Carbon Via Beam Attenuation In A 90-Cm-Long Target

NA/SHINE Collaboration,:,A. Acharya, H. Adhikary,A. Aduszkiewicz, K. K. Allison,E. V. Andronov,T. Antićić,V. Babkin,M. Baszczyk,S. Bhosale, A. Blondel,M. Bogomilov,A. Brandin,A. Bravar,W. Bryliński,J. Brzychczyk,M. Buryakov,O. Busygina,A. Bzdak,H. Cherif,M. Ćirković,M. Csanad,J. Cybowska,T. Czopowicz,A. Damyanova,N. Davis,M. Deliyergiyev,M. Deveaux,A. Dmitriev,W. Dominik,P. Dorosz,J. Dumarchez,R. Engel,G. A. Feofilov,L. Fields,Z. Fodor,A. Garibov,M. Gaździcki,O. Golosov,V. Golovatyuk, M. Golubeva,K. Grebieszkow,F. Guber,A. Haesler,S. N. Igolkin,S. Ilieva,A. Ivashkin,S. R. Johnson,K. Kadija,N. Kargin,E. Kashirin,M. Kiełbowicz,V. A. Kireyeu,V. Klochkov,V. I. Kolesnikov,D. Kolev,A. Korzenev,V. N. Kovalenko,S. Kowalski,M. Koziel,B. Kozłowski,A. Krasnoperov,W. Kucewicz,M. Kuich,A. Kurepin,D. Larsen, A. László,T. V. Lazareva,M. Lewicki,K. Łojek,V. V. Lyubushkin,M. Maćkowiak-Pawłowska,Z. Majka,B. Maksiak,A. I. Malakhov,A. Marcinek,A. D. Marino,K. Marton,H. -J. Mathes,T. Matulewicz,V. Matveev,G. L. Melkumov,A. O. Merzlaya,B. Messerly,Ł. Mik,S. Morozov,Y. Nagai,M. Naskręt,V. Ozvenchuk,V. Paolone,M. Pavin,O. Petukhov,R. Płaneta,P. Podlaski,B. A. Popov,B. Porfy,M. Posiadała-Zezula,D. S. Prokhorova,D. Pszczel,S. Puławski,J. Puzović,M. Ravonel,R. Renfordt,D. Röhrich,E. Rondio,M. Roth,B. T. Rumberger,M. Rumyantsev,A. Rustamov,M. Rybczynski, A. Rybicki, S. Sadhu, A. Sadovsky,K. Schmidt, I. Selyuzhenkov,A. Yu. Seryakov, P. Seyboth,M. Słodkowski,P. Staszel,G. Stefanek,J. Stepaniak,M. Strikhanov,H. Ströbele,T. Šuša,A. Taranenko,A. Tefelska,D. Tefelski,V. Tereshchenko,A. Toia,R. Tsenov,L. Turko,R. Ulrich,M. Unger,D. Uzhva,F. F. Valiev,D. Veberič,V. V. Vechernin,A. Wickremasinghe,K. Wojcik,O. Wyszyński,A. Zaitsev,E. D. Zimmerman, R. Zwaska

PHYSICAL REVIEW D（2021）

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摘要

The production cross section of 30.92 GeV/c protons on carbon is measured by the NA61/SHINE spectrometer at the CERN Super Proton Synchrotron by means of beam attenuation in a copy (replica) of the 90-cm-long target of the T2K neutrino oscillation experiment. The employed method for direct production cross-section estimation minimizes model corrections for elastic and quasielastic interactions. The obtained production cross section is sigma(prod) = 227.6 +/- 0.8ostat(-3.2)(+1.9) osysTHORN - 0.8omodTHORN mb. It is in agreement with previous NA61/SHINE results obtained with a thin carbon target, while providing improved precision with a total fractional uncertainty of less than 2%. This direct measurement will reduce the uncertainty of the T2K neutrino flux prediction.

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