Centrality categorization for R_{p(d)+A} in high-energy collisions
Abstract
High-energy proton- and deuteron-nucleus collisions provide an excellent tool for studying a wide array of physics effects, including modifications of parton distribution functions in nuclei, gluon saturation, and color neutralization and hadronization in a nuclear environment, among others. All of these effects are expected to have a significant dependence on the size of the nuclear target and the impact parameter of the collision, also known as the collision centrality. In this article, we detail a method for determining centrality classes in p(d)+A collisions via cuts on the multiplicity at backward rapidity (i.e., the nucleus-going direction) and for determining systematic uncertainties in this procedure. For d+Au collisions at sqrt(s_NN) = 200 GeV we find that the connection to geometry is confirmed by measuring the fraction of events in which a neutron from the deuteron does not interact with the nucleus. As an application, we consider the nuclear modification factors R_{p(d)+A}, for which there is a potential bias in the measured centrality dependent yields due to auto-correlations between the process of interest and the backward rapidity multiplicity. We determine the bias correction factor within this framework. This method is further tested using the HIJING Monte Carlo generator. We find that for d+Au collisions at sqrt(s_NN)=200 GeV, these bias corrections are small and vary by less than 5% (10%) up to p_T = 10 (20) GeV. In contrast, for p+Pb collisions at sqrt(s_NN) = 5.02 TeV we find these bias factors are an order of magnitude larger and strongly p_T dependent, likely due to the larger effect of multi-parton interactions.
Keywords
Cite
@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. Deshpande and E. J. Desmond and K. V. Dharmawardane and O. Dietzsch and A. Dion and M. Donadelli and O. Drapier and A. Drees and K. A. Drees and J. M. Durham and A. Durum and D. Dutta and L. D'Orazio and S. Edwards and Y. V. Efremenko and F. Ellinghaus and T. Engelmore and A. Enokizono and H. En'yo and S. Esumi and B. Fadem and D. E. Fields and M. Finger and M. Finger, and F. Fleuret and S. L. Fokin and Z. Fraenkel and J. E. Frantz and A. Franz and A. D. Frawley and K. Fujiwara and Y. Fukao and T. Fusayasu and I. Garishvili and A. Glenn and H. Gong and M. Gonin and Y. Goto and R. Granier de Cassagnac and N. Grau and S. V. Greene and G. Grim and M. Grosse Perdekamp and T. Gunji and H. -Å. Gustafsson and J. S. Haggerty and K. I. Hahn and H. Hamagaki and J. Hamblen and R. Han and J. Hanks and E. Haslum and R. Hayano and X. He and M. Heffner and T. K. Hemmick and T. Hester and J. C. Hill and M. Hohlmann and W. Holzmann and K. Homma and B. Hong and T. Horaguchi and D. Hornback and S. Huang and T. Ichihara and R. Ichimiya and Y. Ikeda and K. Imai and M. Inaba and D. Isenhower and M. Ishihara and M. Issah and D. Ivanischev and Y. Iwanaga and B. V. Jacak and J. Jia and X. Jiang and J. Jin and B. M. Johnson and T. Jones and K. S. Joo and D. Jouan and D. S. Jumper and F. Kajihara and J. Kamin and J. H. Kang and J. Kapustinsky and K. Karatsu and M. Kasai and D. Kawall and M. Kawashima and A. V. Kazantsev and T. Kempel and A. Khanzadeev and K. M. Kijima and J. Kikuchi and A. Kim and B. I. Kim and D. J. Kim and E. -J. Kim and Y. -J. Kim and E. Kinney and Á. Kiss and E. Kistenev and D. Kleinjan and L. Kochenda and B. Komkov and M. Konno and J. Koster and A. Král and A. Kravitz and G. J. Kunde and K. Kurita and M. Kurosawa and Y. Kwon and G. S. Kyle and R. Lacey and Y. S. Lai and J. G. Lajoie and A. Lebedev and D. M. Lee and J. Lee and K. B. Lee and K. S. Lee and M. J. Leitch and M. A. L. Leite and X. Li and P. Lichtenwalner and P. Liebing and L. A. Linden Levy and T. 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. Pei and J. -C. Peng and H. Pereira and D. Perepelitsa and D. Yu. Peressounko and R. Petti and C. Pinkenburg and R. P. Pisani and M. Proissl and M. L. Purschke and H. Qu and J. Rak and I. Ravinovich and K. F. Read and S. Rembeczki and K. Reygers and V. Riabov and Y. Riabov and E. Richardson and D. Roach and G. Roche and S. D. Rolnick and M. Rosati and C. A. Rosen and S. S. E. Rosendahl and P. Ružička and B. Sahlmueller and N. Saito and T. Sakaguchi and K. Sakashita and V. Samsonov and S. Sano and T. Sato and S. Sawada and K. Sedgwick and J. Seele and R. Seidl and R. Seto and D. Sharma and I. Shein and T. -A. Shibata and K. Shigaki and M. Shimomura and K. Shoji and P. Shukla and A. Sickles and C. L. Silva and D. Silvermyr and C. Silvestre and K. S. Sim and B. K. Singh and C. P. Singh and V. Singh and M. Slunečka and R. A. Soltz and W. E. Sondheim and S. P. Sorensen and I. V. Sourikova and P. W. Stankus and E. Stenlund and S. P. Stoll and T. Sugitate and A. Sukhanov and J. Sziklai and E. 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}
}
Comments
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