用户名: 密码: 验证码:
Measurement of electrons from heavy-flavour hadron decays in p-Pb collisions at
详细信息    查看全文
文摘
The production of electrons from heavy-flavour hadron decays was measured as a function of transverse momentum (pT) in minimum-bias p&ndash;Pb collisions at View the MathML source using the ALICE detector at the LHC. The measurement covers the pT interval 0.5<pT<12 GeV/c and the rapidity range −1.065<ycms<0.135 in the centre-of-mass reference frame. The contribution of electrons from background sources was subtracted using an invariant mass approach. The nuclear modification factor RpPb was calculated by comparing the pT-differential invariant cross section in p&ndash;Pb collisions to a pp reference at the same centre-of-mass energy, which was obtained by interpolating measurements at View the MathML source and View the MathML source. The RpPb is consistent with unity within uncertainties of about 25%, which become larger for pT below 1 GeV/c. The measurement shows that heavy-flavour production is consistent with binary scaling, so that a suppression in the high-pT yield in Pb&ndash;Pb collisions has to be attributed to effects induced by the hot medium produced in the final state. The data in p&ndash;Pb collisions are described by recent model calculations that include cold nuclear matter effects.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700