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arXiv 1111.1630hep-ex
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$\sqrt{s}=7$ TeV pp碰撞中J/ $ψ$极化

J/$ψ$ polarization in pp collisions at $\sqrt{s}=7$ TeV

ALICE Collaboration

摘要:

我们在LHC上研究了$\sqrt{s}=7$ TeV pp碰撞中μ子对衰变产生J/psi。测量了衰变μ子的极角和方位角分布,得到了J/ $ψ$极化参数$λ_θ$和$λ_ϕ$的结果。在螺旋度和Collins-Soper参考系中,在2.5<y<4,2< $p_{\rm T}$ <8 GeV/ $c$的运动学区域中进行了研究。在这两个框架中,偏振参数与零相容,在不确定性内。

英文摘要:

We have studied J/psi production in pp collisions at $\sqrt{s}=7$ TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/$ψ$ polarization parameters $λ_θ$ and $λ_ϕ$ were obtained. The study was performed in the kinematic region 2.5<y<4, 2<$p_{\rm T}$<8 GeV/$c$, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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