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arxiv: 2010.11819 · v2 · pith:WLD2AY6I · submitted 2020-10-22 · hep-ex

Measurement of the production cross section of 31 GeV/c protons on carbon via beam attenuation in a 90-cm-long target

NA61/SHINE Collaboration: A. Acharya , H. Adhikary , A. Aduszkiewicz , K.K. Allison , E.V. Andronov , T. Anti\'ci\'c , V. Babkin , M. Baszczyk
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S. Bhosale A. Blondel M. Bogomilov A. Brandin A. Bravar W. Bryli\'nski J. Brzychczyk M. Buryakov O. Busygina A. Bzdak H. Cherif M. \'Cirkovi\'c 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. Ga\'zdzicki 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. Kie{\l}bowicz V.A. Kireyeu V. Klochkov V.I. Kolesnikov D. Kolev A. Korzenev V.N. Kovalenko S. Kowalski M. Koziel B. Koz{\l}owski A. Krasnoperov W. Kucewicz M. Kuich A. Kurepin D. Larsen A. L\'aszl\'o T.V. Lazareva M. Lewicki K. {\L}ojek V.V. Lyubushkin M. Ma\'ckowiak-Paw{\l}owska 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 {\L}. Mik S. Morozov Y. Nagai M. Naskr\k{e}t V. Ozvenchuk V. Paolone M. Pavin O. Petukhov R. P{\l}aneta P. Podlaski B.A. Popov B. Porfy M. Posiada{\l}a-Zezula D.S. Prokhorova D. Pszczel S. Pu{\l}awski J. Puzovi\'c M. Ravonel R. Renfordt D. R\"ohrich 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. S{\l}odkowski P. Staszel G. Stefanek J. Stepaniak M. Strikhanov H. Str\"obele T. \v{S}u\v{s}a A. Taranenko A. Tefelska D. Tefelski V. Tereshchenko A. Toia R. Tsenov L. Turko R. Ulrich M. Unger D. Uzhva F.F. Valiev D. Veberi\v{c} V.V. Vechernin A. Wickremasinghe K. Wojcik O. Wyszy\'nski A. Zaitsev E.D. Zimmerman R. Zwaska
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keywords mathrmproductioncarboncrosssectiontargetattenuationbeam
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The production cross section of 30.92 GeV/$c$ protons on carbon is measured by the NA61/SHINE spectrometer at the CERN SPS 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 quasi-elastic interactions. The obtained production cross section is $\sigma_\mathrm{prod}~=~227.6~\pm~0.8\mathrm{(stat)}~_{-~3.2}^{+~1.9}\mathrm{(sys)}~{-~0.8}\mathrm{(mod)}$ 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 is performed to reduce the uncertainty on the T2K neutrino flux prediction associated with the re-weighting of the interaction rate of neutrino-yielding hadrons.

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