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Measurement of neutral current e+/-p cross sections at high Bjorken x with the ZEUS detector

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arxiv 1312.4438 v2 pith:CSKHQKYO submitted 2013-12-16 hep-ex

Measurement of neutral current e+/-p cross sections at high Bjorken x with the ZEUS detector

ZEUS Collaboration , H. Abramowicz , I. Abt , L. Adamczyk , M. Adamus , R. Aggarwal , S. Antonelli , O. Arslan
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V. Aushev Y. Aushev O. Bachynska A.N. Barakbaev N. Bartosik O. Behnke J. Behr U. Behrens A. Bertolin S. Bhadra I. Bloch V. Bokhonov E.G. Boos K. Borras I. Brock R. Brugnera A. Bruni B. Brzozowska P.J. Bussey A. Caldwell M. Capua C.D. Catterall J. Chwastowski J. Ciborowski R. Ciesielski A.M. Cooper-Sarkar M. Corradi F. Corriveau G. D Agostini R.K. Dementiev R.C.E. Devenish G. Dolinska V. Drugakov S. Dusini J. Ferrando J. Figiel B. Foster G. Gach A. Garfagnini A. Geiser A. Gizhko L.K. Gladilin O. Gogota Yu.A. Golubkov J. Grebenyuk I. Gregor G. Grzelak O. Gueta M. Guzik W. Hain G. Hartner D. Hochman R. Hori Z.A. Ibrahim Y. Iga M. Ishitsuka A. Iudin F. Januschek I. Kadenko S. Kananov T. Kanno U. Karshon M. Kaur P. Kaur L.A. Khein D. Kisielewska R. Klanner U. Klein N. Kondrashova O. Kononenko Ie. Korol I.A. Korzhavina A. Kotanski U. Koetz N. Kovalchuk H. Kowalski O. Kuprash M. Kuze B.B. Levchenko A. Levy V. Libov S. Limentani M. Lisovyi E. Lobodzinska W. Lohmann B. Loehr E. Lohrmann A. Longhin D. Lontkovskyi O.Yu. Lukina J. Maeda I. Makarenko J. Malka J.F. Martin S. Mergelmeyer F. Mohamad Idris K. Mujkic V. Myronenko K. Nagano A. Nigro T. Nobe D. Notz R.J. Nowak K. Olkiewicz Yu. Onishchuk E. Paul W. Perlanski H. Perrey N.S. Pokrovskiy A.S. Proskuryakov M. Przybycien A. Raval P. Roloff I. Rubinsky M. Ruspa V. Samojlov D.H. Saxon M. Schioppa W.B. Schmidke U. Schneekloth T. Schoerner-Sadenius J. Schwartz L.M. Shcheglova R. Shevchenko O. Shkola I. Singh I.O. Skillicorn W. Slominski V. Sola A. Solano A. Spiridonov L. Stanco N. Stefaniuk A. Stern T.P. Stewart P. Stopa J. Sztuk-Dambietz D. Szuba J. Szuba E. Tassi T. Temiraliev K. Tokushuku J. Tomaszewska A. Trofymov V. Trusov T. Tsurugai M. Turcato O. Turkot T. Tymieniecka A. Verbytskyi O. Viazlo R. Walczak W.A.T. Wan Abdullah K. Wichmann M. Wing G. Wolf S. Yamada Y. Yamazaki N. Zakharchuk A.F. Zarnecki L. Zawiejski O. Zenaiev B.O. Zhautykov N. Zhmak D.S. Zotkin
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classification hep-ex
keywords crosscurrentneutralbjorkencompareddetectorimprovedmeasurement
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The neutral current e+/-p cross section has been measured up to values of Bjorken x of approximately 1 with the ZEUS detector at HERA using an integrated luminosity of 187 inv. pb of e-p and 142 inv. pb of e+p collisions at sqrt(s) = 318GeV. Differential cross sections in x and Q2, the exchanged boson virtuality, are presented for Q2 geq 725GeV2. An improved reconstruction method and greatly increased amount of data allows a finer binning in the high-x region of the neutral current cross section and leads to a measurement with much improved precision compared to a similar earlier analysis. The measurements are compared to Standard Model expectations based on a variety of recent parton distribution functions.

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