高能碰撞中 R_{p(d)+A} 的中心度分类
核实验
2019-08-13 v1
摘要
高能质子和氘核 - 原子核碰撞为研究广泛的物理效应提供了极好的工具，包括原子核中部分子分布函数的修正、胶子饱和、以及核环境中的色中和与强子化等。预计所有这些效应都显著依赖于核靶的大小和碰撞的撞击参数（也称为碰撞中心度）。在本文中，我们详细阐述了一种通过在向后快度（即原子核运动方向）处的多重数进行截断来确定 p(d)+A 碰撞中中心度类别的方法，并确定了该过程中的系统不确定性。对于 sqrt(s_NN) = 200 GeV 的 d+Au 碰撞，我们发现通过测量氘核中的中子不与原子核发生相互作用的事件比例，证实了与几何结构的联系。作为一个应用，我们考虑了核修正因子 R_{p(d)+A}，其中由于感兴趣的过程与向后快度多重数之间的自相关性，测量的中心度依赖产额可能存在潜在偏差。我们在此框架内确定了偏差校正因子。该方法进一步使用 HIJING 蒙特卡洛发生器进行了测试。我们发现，对于 sqrt(s_NN)=200 GeV 的 d+Au 碰撞，这些偏差校正很小，且在 p_T = 10 (20) GeV 以下变化小于 5% (10%)。相比之下，对于 sqrt(s_NN) = 5.02 TeV 的 p+Pb 碰撞，我们发现这些偏差因子大一个数量级且强烈依赖于 p_T，这可能是由于多部分子相互作用效应更大所致。
引用
@article{arxiv.1310.4793,
title = {Centrality categorization for R_{p(d)+A} in high-energy collisions},
author = {A. Adare and C. Aidala and N. N. Ajitanand and Y. Akiba and H. Al-Bataineh and J. Alexander and A. Angerami and K. Aoki and N. Apadula and Y. Aramaki and E. T. Atomssa and R. Averbeck and T. C. Awes and B. Azmoun and V. Babintsev and M. Bai and G. Baksay and L. Baksay and K. N. Barish and B. Bassalleck and A. T. Basye and S. Bathe and V. Baublis and C. Baumann and A. Bazilevsky and S. Belikov and R. Belmont and R. Bennett and J. H. Bhom and D. S. Blau and J. S. Bok and K. Boyle and M. L. Brooks and H. Buesching and V. Bumazhnov and G. Bunce and S. Butsyk and S. Campbell and A. Caringi and C. -H. Chen and C. Y. Chi and M. Chiu and I. J. Choi and J. B. Choi and R. K. Choudhury and P. Christiansen and T. Chujo and P. Chung and O. Chvala and V. Cianciolo and Z. Citron and B. A. Cole and Z. Conesa del Valle and M. Connors and M. Csanád and T. Csörgő and T. Dahms and S. Dairaku and I. Danchev and K. Das and A. Datta and G. David and M. K. Dayananda and A. Denisov and A. 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Liška and H. Liu and M. X. Liu and B. Love and D. Lynch and C. F. Maguire and Y. I. Makdisi and M. D. Malik and V. I. Manko and E. Mannel and Y. Mao and H. Masui and F. Matathias and M. McCumber and P. L. McGaughey and D. McGlinchey and N. Means and B. Meredith and Y. Miake and T. Mibe and A. C. Mignerey and K. Miki and A. Milov and J. T. Mitchell and A. K. Mohanty and H. J. Moon and Y. Morino and A. Morreale and D. P. Morrison and T. V. Moukhanova and T. Murakami and J. Murata and S. Nagamiya and J. L. Nagle and M. Naglis and M. I. Nagy and I. Nakagawa and Y. Nakamiya and K. R. Nakamura and T. Nakamura and K. Nakano and S. Nam and J. Newby and M. Nguyen and M. Nihashi and R. Nouicer and A. S. Nyanin and C. Oakley and E. O'Brien and S. X. Oda and C. A. Ogilvie and M. Oka and K. Okada and Y. Onuki and J. D. Orjuela Koop and A. Oskarsson and M. Ouchida and K. Ozawa and R. Pak and V. Pantuev and V. Papavassiliou and I. H. Park and S. K. Park and W. J. Park and S. F. Pate and H. 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M. Takagui and A. Taketani and R. Tanabe and Y. Tanaka and S. Taneja and K. Tanida and M. J. Tannenbaum and S. Tarafdar and A. Taranenko and H. Themann and D. Thomas and T. L. Thomas and M. Togawa and A. Toia and L. Tomášek and H. Torii and R. S. Towell and I. Tserruya and Y. Tsuchimoto and C. Vale and H. Valle and H. W. van Hecke and E. Vazquez-Zambrano and A. Veicht and J. Velkovska and R. Vértesi and M. Virius and V. Vrba and E. Vznuzdaev and X. R. Wang and D. Watanabe and K. Watanabe and Y. Watanabe and F. Wei and R. Wei and J. Wessels and S. N. White and D. Winter and C. L. Woody and R. M. Wright and M. Wysocki and Y. L. Yamaguchi and K. Yamaura and R. Yang and A. Yanovich and J. Ying and S. Yokkaichi and Z. You and G. R. Young and I. Younus and I. E. Yushmanov and W. A. Zajc and S. Zhou},
journal= {arXiv preprint arXiv:1310.4793},
year = {2019}
}
备注
375 authors, 18 pages, 16 figures, 4 tables. Submitted to Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html