Publication: Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at root s=510 GeV
Дата
2019
Авторы
Adam, J.
Adamczyk, L.
Adams, J. R.
Adkins, J. K.
Alekseev, I.
Brandin, A, V.
Kochenda, L.
Kravtsov, P.
Nigmatkulov, G.
Okorokov, V. A.
Journal Title
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Аннотация
We report new STAR measurements of the single-spin asymmetries A(L) for W+ and W- bosons produced in polarized proton-proton collisions at root s = 510 GeV as a function of the decay-positron and decay-electron pseudorapidity. The data were obtained in 2013 and correspond to an integrated luminosity of 250 pb(-1). The results are combined with previous results obtained with 86 pb(-1). A comparison with theoretical expectations based on polarized lepton-nucleon deep-inelastic scattering and prior polarized proton-proton data suggests a difference between the (u) over bar and (b) over bar quark helicity distributions for 0.05 < x < 0.25. In addition, we report new results for the double-spin asymmetries A(LL) for W-+/-, as well as A(L) for Z/gamma* production and subsequent decay into electron-positron pairs.
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Цитирование
Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at root s=510 GeV / Adam, J [et al.] // Physical Review D. - 2019. - 99. - № 5. - 10.1103/PhysRevD.99.051102
URI
https://www.doi.org/10.1103/PhysRevD.99.051102
https://www.scopus.com/record/display.uri?eid=2-s2.0-85064414031&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000461906000001
https://openrepository.mephi.ru/handle/123456789/16714
https://www.scopus.com/record/display.uri?eid=2-s2.0-85064414031&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000461906000001
https://openrepository.mephi.ru/handle/123456789/16714