- Main
Measurement of the W charge asymmetry in the W→μν decay mode in pp collisions at √s=7 TeV with the ATLAS detector
- Aad, G;
- Abbott, B;
- Abdallah, J;
- Abdelalim, AA;
- Abdesselam, A;
- Abdinov, O;
- Abi, B;
- Abolins, M;
- Abramowicz, H;
- Abreu, H;
- Acerbi, E;
- Acharya, BS;
- Adams, DL;
- Addy, TN;
- Adelman, J;
- Aderholz, M;
- Adomeit, S;
- Adragna, P;
- Adye, T;
- Aefsky, S;
- Aguilar-Saavedra, JA;
- Aharrouche, M;
- Ahlen, SP;
- Ahles, F;
- Ahmad, A;
- Ahsan, M;
- Aielli, G;
- Akdogan, T;
- Åkesson, TPA;
- Akimoto, G;
- Akimov, AV;
- Akiyama, A;
- Alam, MS;
- Alam, MA;
- Albrand, S;
- Aleksa, M;
- Aleksandrov, IN;
- Alessandria, F;
- Alexa, C;
- Alexander, G;
- Alexandre, G;
- Alexopoulos, T;
- Alhroob, M;
- Aliev, M;
- Alimonti, G;
- Alison, J;
- Aliyev, M;
- Allport, PP;
- Allwood-Spiers, SE;
- Almond, J;
- Aloisio, A;
- Alon, R;
- Alonso, A;
- Alviggi, MG;
- Amako, K;
- Amaral, P;
- Amelung, C;
- Ammosov, VV;
- Amorim, A;
- Amorós, G;
- Amram, N;
- Anastopoulos, C;
- Andeen, T;
- Anders, CF;
- Anderson, KJ;
- Andreazza, A;
- Andrei, V;
- Andrieux, ML;
- Anduaga, XS;
- Angerami, A;
- Anghinolfi, F;
- Anjos, N;
- Annovi, A;
- Antonaki, A;
- Antonelli, M;
- Antonelli, S;
- Antonov, A;
- Antos, J;
- Anulli, F;
- Aoun, S;
- Aperio Bella, L;
- Apolle, R;
- Arabidze, G;
- Aracena, I;
- Arai, Y;
- Arce, ATH;
- Archambault, JP;
- Arfaoui, S;
- Arguin, JF;
- Arik, E;
- Arik, M;
- Armbruster, AJ;
- Arnaez, O;
- Arnault, C;
- Artamonov, A;
- Artoni, G;
- Arutinov, D;
- Asai, S;
- Asfandiyarov, R;
- Ask, S
- et al.
Abstract
This Letter reports a measurement of the muon charge asymmetry from W bosons produced in proton–proton collisions at a centre-of-mass energy of 7 TeV with the ATLAS experiment at the LHC. The asymmetry is measured in the W→μν decay mode as a function of the muon pseudorapidity using a data sample corresponding to a total integrated luminosity of 31 pb−1. The results are compared to predictions based on next-to-leading order calculations with various parton distribution functions. This measurement provides information on the u and d quark momentum fractions in the proton.
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