The neutral current e±p cross section has been measured up to values of Bjorken x ≅ 1 with the ZEUS detector at HERA using an integrated luminosity of 187 pb−1 of e−p and 142 pb−1 of e+p collisions at √s=318 GeV. Differential cross sections in x and Q2, the exchanged boson virtuality, are presented for Q2 ≥ 725 GeV2. 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.
Measurement of neutral current e±p cross sections at high Bjorken x with the ZEUS detector
SOLA, VALENTINA;SOLANO, Ada Maria;
2014-01-01
Abstract
The neutral current e±p cross section has been measured up to values of Bjorken x ≅ 1 with the ZEUS detector at HERA using an integrated luminosity of 187 pb−1 of e−p and 142 pb−1 of e+p collisions at √s=318 GeV. Differential cross sections in x and Q2, the exchanged boson virtuality, are presented for Q2 ≥ 725 GeV2. 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.File | Dimensione | Formato | |
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PhysRevD.89.072007.pdf
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