arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2107.14643hep-phhep-exhep-th
收藏

在$k_t$ -因子分解和不同角序未积分部分子分布框架下孤立单光子产生的P-P(P)截面

The P-P(P) cross-section of isolated single-photon production in the $k_t$-factorization and different angular ordering unintegrated parton distributions frameworks

R. Aminzadeh Nik, M. Modarres, N. Olanj, R. Taghavi

摘要:

本文计算和研究了高能P-P(P)对撞机(如LHC和TEVATRON)中瞬时单光子产生的单、双微分截面随产生的单光子横动量和快度的变化。在$k_t$ -因式分解框架下,采用不同的角序非积分部分子分布函数(UPDF),即Kimber等人和Martin等人的方法,计算了瞬发单光子产生的微分截面.这些方案相关的UPDF产生的领先和次领先的顺序水平,预测和分析不同的部分子贡献上述截面。上述两个过程利用Martin等人的现象学部分子分布函数(PDF)库,也就是说,MMHT2014。结果表明,在上述框架中计算的瞬发单光子产生微分截面与不同合作的实验数据相比,CDF(2017),ATLAS(2017),CMS(2011)和D 0(2006),以及其他理论预测,如共线因子分解蒙特卡罗计算(JETPHOX,SHERPA,PYTHIA和MCFM方法)。为了更精确地计算非线性光学胶子-胶子、夸克-胶子和夸克-(反)夸克过程的微分截面。对(i)贡献部分子过程的行为,(ii)$2\to 2$和$2\to 3$子过程之间可能的双重计数,即,胶子融合,在我们计算的提示单光子产生微分截面和(iii)我们的结果的灵敏度检查不同的角度排序约束。

英文摘要:

In the present work, it is intended to calculate and study the single and double differential cross-sections of the prompt single-photon production as a function of produced single-photon transverse momentum and rapidity, in the high-energy P-P(P) colliders, such as LHC and TEVATRON. The differential cross-sections of prompt single-photon production are calculated in the $k_t$-factorization frameworks using various angular ordering unintegrated parton distribution functions (UPDF), namely the Kimber et al. and Martin et al. procedures. These scheme-dependent UPDF are generated in the leading and next-to-leading order levels to predict and analyze the different partonic contributions to the above cross-sections. The above two procedures utilize the phenomenological parton distribution functions (PDF) libraries of Martin et al., i.e., MMHT2014. It is shown that the calculated prompt single-photon production differential cross-sections in the above frameworks are relatively successful in generating satisfactory results compared to the experimental data of different collaborations, i.e., CDF (2017), ATLAS (2017), CMS (2011) and D0 (2006), as well as the other theoretical predictions such as collinear factorization Monte Carlo calculations (the JETPHOX, SHERPA, PYTHIA, and MCFM methods). Also, for a closer precision, the differential cross-section for the NLO gluon-gluon , quark-gluon and quark-(anti)quark processes are calculated. An extensive discussion and comparison are made regarding (i) the behavior of the contributing partonic sub-processes, (ii) the possible double-counting between the $2\to 2$ and $2\to 3$ sub-processes, i.e., gluons-fusion, in our calculated prompt single-photon production differential cross-sections and (iii) the sensibility check of our results to the different angular ordering constraints.

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。

↑