Measurement of charged current deep inelastic scattering cross sections with a longitudinally polarised electron beam at HERA

TL;DR

This paper reports measurements of charged current deep inelastic scattering cross sections with polarized electrons at HERA, providing data that tests the Standard Model predictions across various kinematic ranges.

Contribution

First measurement of charged current deep inelastic scattering cross sections with longitudinally polarized electrons at HERA, expanding understanding of electroweak interactions.

Findings

Measured cross sections agree with Standard Model predictions.

Provided detailed differential cross-section data across multiple kinematic variables.

Enhanced understanding of polarization effects in deep inelastic scattering.

Abstract

Measurements of the cross sections for charged current deep inelastic scattering in e-p collisions with longitudinally polarised electron beams are presented. The measurements are based on a data sample with an integrated luminosity of 175 pb-1 collected with the ZEUS detector at HERA at a centre-of-mass energy of 318 GeV. The total cross section is given for positively and negatively polarised electron beams. The differential cross-sections dsigma/dQ2, dsigma/dx and dsigma/dy are presented for Q2>200 GeV2. The double-differential cross-section d2sigma/dxdQ2 is presented in the kinematic range 280<Q2<30000 GeV2 and 0.015<x<0.65. The measured cross sections are compared with the predictions of the Standard Model.