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arXiv 0712.0777hep-phhep-ex
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Tevatron光子喷流产生中的T奇效应

T-odd effects in photon-jet production at the Tevatron

D. Boer, P. J. Mulders, C. Pisano

摘要:

考虑初始强子中部分子的横向动量,在广义因子分解方案中研究了p \bar{p} -> γ喷流X中光子喷流产生的角分布。在这个方案中,在Drell-Yan过程中观察到的一个非常大的cos(2 π)不对称性可以归因于T-奇数、自旋和横向动量相关的部分子分布函数h_1^{ \perp q}(x,p_{\perp} ^2)。这个相同的函数预期在光子射流产生截面中产生cos(2 π)不对称性。我们给出了这个特定的方位角不对称,这是估计小于Drell-Yan不对称,但仍然相当大的规模Tevatron运动学的表达式。这为在Tevatron上研究T奇效应提供了新的可能性。

英文摘要:

The angular distribution in photon-jet production in p \bar{p} -> γjet X is studied within a generalized factorization scheme taking into account the transverse momentum of the partons in the initial hadrons. Within this scheme an anomalously large cos(2ϕ) asymmetry observed in the Drell-Yan process could be attributed to the T-odd, spin and transverse momentum dependent parton distribution function h_1^{\perp q}(x, p_{\perp}^2). This same function is expected to produce a cos(2ϕ) asymmetry in the photon-jet production cross section. We give the expression for this particular azimuthal asymmetry, which is estimated to be smaller than the Drell-Yan asymmetry but still of considerable size for Tevatron kinematics. This offers a new possibility to study T-odd effects at the Tevatron.

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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