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arXiv 0902.0355hep-ex
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魅力生产的核依赖性

Nuclear Dependence of Charm Production

The SELEX Collaboration, A. Blanco-Covarrubias, J. Engelfried

摘要:

通过SELEX,在1996-1997年在费米实验室的固定目标运行积累的数据,我们研究了生产的魅力强子的铜和碳目标与西格玛,p,π-和π +束。参数化产生的截面A^alpha,A是原子序数,我们确定了D+、D 0、Ds+、D+(2010)、Lambda_c+和它们各自的反粒子的α,作为它们的横向动量pt和标度纵向动量xF的函数。在我们的统计数据中,对于0.1<xF<1.0的区间,任何魅力物种的α对xF都没有依赖性。由π介子束产生粲的α平均值为alpha_{meson} =0.850+/-0.028。这略大于重子束产生粲的相应平均值alpha_{baryon} =0.755+/-0.016(Sigma-,p)。

英文摘要:

With data taken by SELEX, which accumulated data during the 1996-1997 fixed target run at Fermilab, we study the production of charmed hadrons on copper and carbon targets with Sigma-, p, pi-, and pi+ beams. Parameterizing the production cross section A^alpha, A being the atomic number, we determine alpha for D+, D0, Ds+, D+(2010), Lambda_c+, and their respective anti-particles, as a function of their transverse momentum pt and scaled longitudinal momentum xF. Within our statistics there is no dependence of alpha on xF for any charm species for the interval 0.1<xF<1.0. The average value of alpha for charm production by pion beams is alpha_{meson}=0.850+/-0.028. This is somewhat larger than the corresponding average alpha_{baryon}=0.755+/-0.016 for charm production by baryon beams (Sigma-, p).

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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