Nuclear-Modification Factor for Open-Heavy-Flavor Production at Forward Rapidity in Cu+Cu Collisions at sqrt(s_NN)=200 GeV
Abstract
Background: Heavy-flavor production in p+p collisions tests perturbative-quantum-chromodynamics (pQCD) calculations. Modification of heavy-flavor production in heavy-ion collisions relative to binary-collision scaling from p+p results, quantified with the nuclear-modification factor (R_AA), provides information on both cold- and hot-nuclear-matter effects. Purpose: Determine transverse-momentum, pt, spectra and the corresponding R_AA for muons from heavy-flavor mesons decay in p+p and Cu+Cu collisions at sqrt(s_NN)=200 GeV and y=1.65. Method: Results are obtained using the semi-leptonic decay of heavy-flavor mesons into negative muons. The PHENIX muon-arm spectrometers measure the p_T spectra of inclusive muon candidates. Backgrounds, primarily due to light hadrons, are determined with a Monte-Carlo calculation using a set of input hadron distributions tuned to match measured-hadron distributions in the same detector and statistically subtracted. Results: The charm-production cross section in p+p collisions at sqrt{s}=200 GeV, integrated over pt and in the rapidity range 1.4<y<1.9 is found to be dsigma_ccbar/dy = 0.139 +/- 0.029 (stat) ^{+0.051}_{-0.058} (syst) mb. This result is consistent with calculations and with expectations based on the corresponding midrapidity charm-production cross section measured earlier by PHENIX. The R_AA for heavy-flavor muons in Cu+Cu collisions is measured in three centrality intervals for 1<pt<4 GeV/c. Suppression relative to binary-collision scaling (R_AA<1) increases with centrality. Conclusions: Within experimental and theoretical uncertainties, the measured heavy-flavor yield in p+p collisions is consistent with state-of-the-art pQCD calculations. Suppression in central Cu+Cu collisions suggests the presence of significant cold-nuclear-matter effects and final-state energy loss.
Cite
@article{arxiv.1204.0754,
title = {Nuclear-Modification Factor for Open-Heavy-Flavor Production at Forward Rapidity in Cu+Cu Collisions at sqrt(s_NN)=200 GeV},
author = {A. Adare and S. Afanasiev and C. Aidala and N. N. Ajitanand and Y. Akiba and H. Al-Bataineh and J. Alexander and K. Aoki and L. Aphecetche and R. Armendariz and S. H. Aronson and J. Asai and E. T. Atomssa and R. Averbeck and T. C. Awes and B. Azmoun and V. Babintsev and G. Baksay and L. Baksay and A. Baldisseri and K. N. Barish and P. D. Barnes and B. Bassalleck and S. Bathe and S. Batsouli and V. Baublis and A. Bazilevsky and S. Belikov and R. Bennett and Y. Berdnikov and A. A. Bickley and J. G. Boissevain and H. Borel and K. Boyle and M. L. Brooks and H. Buesching and V. Bumazhnov and G. Bunce and S. Butsyk and S. Campbell and B. S. Chang and J. -L. Charvet and S. Chernichenko and C. Y. Chi and J. Chiba and M. Chiu and I. J. Choi and T. Chujo and P. Chung and A. Churyn and V. Cianciolo and C. R. Cleven and B. A. Cole and M. P. Comets and P. Constantin and M. Csanád and T. Csörgő and T. Dahms and K. Das and G. David and M. B. Deaton and K. Dehmelt and H. Delagrange and A. Denisov and D. d'Enterria and A. Deshpande and E. J. Desmond and O. Dietzsch and A. Dion and M. Donadelli and O. Drapier and A. Drees and A. K. Dubey and A. Durum and V. Dzhordzhadze and Y. V. Efremenko and J. Egdemir and F. Ellinghaus and W. S. Emam and A. Enokizono and H. En'yo and S. Esumi and K. O. Eyser 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 S. Gadrat and I. Garishvili and A. Glenn and H. Gong and M. Gonin and J. Gosset and Y. Goto and R. Granier de Cassagnac and N. Grau and S. V. Greene and M. Grosse Perdekamp and T. Gunji and H. -Å. Gustafsson and T. Hachiya and A. Hadj Henni and C. Haegemann and J. S. Haggerty and H. Hamagaki and R. Han and H. Harada and E. P. Hartouni and K. Haruna and E. Haslum and R. Hayano and X. He and M. Heffner and T. K. Hemmick and T. Hester and H. Hiejima and J. C. Hill and R. Hobbs and M. Hohlmann and W. Holzmann and K. Homma and B. Hong and T. Horaguchi and D. Hornback and T. Ichihara and H. Iinuma and K. Imai and M. Inaba and Y. Inoue and D. Isenhower and L. Isenhower and M. Ishihara and T. Isobe and M. Issah and A. Isupov and B. V. Jacak and J. Jia and J. Jin and O. Jinnouchi and B. M. Johnson and K. S. Joo and D. Jouan and F. Kajihara and S. Kametani and N. Kamihara and J. Kamin and M. Kaneta and J. H. Kang and H. Kanou and D. Kawall and A. V. Kazantsev and A. Khanzadeev and J. Kikuchi and D. H. Kim and D. J. Kim and E. Kim and E. Kinney and Á. Kiss and E. Kistenev and A. Kiyomichi and J. Klay and C. Klein-Boesing and L. Kochenda and V. Kochetkov and B. Komkov and M. Konno and D. Kotchetkov and A. Kozlov and A. Král and A. Kravitz and J. Kubart and G. J. Kunde and N. Kurihara and K. Kurita and M. J. Kweon 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 M. K. Lee and T. Lee and M. J. Leitch and M. A. L. Leite and B. Lenzi and X. Li and T. Liška and A. Litvinenko and M. X. Liu and B. Love and D. Lynch and C. F. Maguire and Y. I. Makdisi and A. Malakhov and M. D. Malik and V. I. Manko and Y. Mao and L. Mašek and H. Masui and F. Matathias and M. McCumber and P. L. McGaughey and Y. Miake and P. Mikeš and K. Miki and T. E. Miller and A. Milov and S. Mioduszewski and M. Mishra and J. T. Mitchell and M. Mitrovski and A. Morreale and D. P. Morrison and T. V. Moukhanova and D. Mukhopadhyay and J. Murata and S. Nagamiya and Y. Nagata and J. L. Nagle and M. Naglis and I. Nakagawa and Y. Nakamiya and T. Nakamura and K. Nakano and J. Newby and M. Nguyen and B. E. Norman and R. Nouicer and A. S. Nyanin and E. O'Brien and S. X. Oda and C. A. Ogilvie and H. Ohnishi and M. Oka and K. Okada and O. O. Omiwade and A. Oskarsson and M. Ouchida and K. Ozawa and R. Pak and D. Pal and A. P. T. Palounek and V. Pantuev and V. Papavassiliou and J. Park and W. J. Park and S. F. Pate and H. Pei and J. -C. Peng and H. Pereira and V. Peresedov and D. Yu. Peressounko and C. Pinkenburg and M. L. Purschke and A. K. Purwar and H. Qu and J. Rak and A. Rakotozafindrabe and I. Ravinovich and K. F. Read and S. Rembeczki and M. Reuter and K. Reygers and V. Riabov and Y. Riabov and G. Roche and A. Romana and M. Rosati and S. S. E. Rosendahl and P. Rosnet and P. Rukoyatkin and V. L. Rykov and B. Sahlmueller and N. Saito and T. Sakaguchi and S. Sakai and H. Sakata and V. Samsonov and S. Sato and S. Sawada and J. Seele and R. Seidl and V. Semenov and R. Seto and D. Sharma and I. Shein and A. Shevel and T. -A. Shibata and K. Shigaki and M. Shimomura and K. Shoji and A. Sickles and C. L. Silva and D. Silvermyr and C. Silvestre and K. S. Sim and C. P. Singh and V. Singh and S. Skutnik and M. Slunečka and A. Soldatov and R. A. Soltz and W. E. Sondheim and S. P. Sorensen and I. V. Sourikova and F. Staley and P. W. Stankus and E. Stenlund and M. Stepanov and A. Ster and S. P. Stoll and T. Sugitate and C. Suire and J. Sziklai and T. Tabaru and S. Takagi and E. M. Takagui and A. Taketani and Y. Tanaka and K. Tanida and M. J. Tannenbaum and A. Taranenko and P. Tarján and T. L. Thomas and M. Togawa and A. Toia and J. Tojo and L. Tomášek and H. Torii and R. S. Towell and V-N. Tram and I. Tserruya and Y. Tsuchimoto and C. Vale and H. Valle and H. W. van Hecke and J. Velkovska and R. Vértesi and A. A. Vinogradov and M. Virius and V. Vrba and E. Vznuzdaev and M. Wagner and D. Walker and X. R. Wang and Y. Watanabe and J. Wessels and S. N. White and D. Winter and C. L. Woody and M. Wysocki and W. Xie and Y. L. Yamaguchi and A. Yanovich and Z. Yasin and J. Ying and S. Yokkaichi and G. R. Young and I. Younus and I. E. Yushmanov and W. A. Zajc and O. Zaudtke and C. Zhang and S. Zhou and J. Zimányi and L. Zolin},
journal= {arXiv preprint arXiv:1204.0754},
year = {2019}
}
Comments
376 authors, 18 pages, 14 figures, 5 tables. Submitted to Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are publicly available at http://www.phenix.bnl.gov/phenix/WWW/info/data/ppg123_data.html