Measurements of 
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 cross sections and their ratios in 
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 collisions

Adam, J.; Adamczyk, L.; Adams, J. R.; Adkins, J. K.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alekseev, I.; Anderson, D. M.; Aparin, A.; Aschenauer, E. C.; Ashraf, M. U.; Atetalla, F. G.; Attri, A.; Averichev, G. S.; Bairathi, V.; Barish, K. N.; Behera, A.; Bellwied, R.; Bhasin, A.; Bielčík, J.; Bielčíková, J.; Bland, L. C.; Bordyuzhin, I. G.; Brandenburg, J. D.; Brandin, A. V.; Butterworth, J.; Caines, H.; Sánchez, M. Calderón De La Barca; Cebra, D.; Chakaberia, I.; Chaloupka, P.; Chan, B. K.; Chang, F-H.; Chang, Z.; Chankova-Bunzarova, N.; Chatterjee, A.; Chen, D.; Chen, J.; Chen, J. H.; Chen, X.; Chen, Z.; Cheng, J.; Cherney, M.; Chevalier, M.; Choudhury, S.; Christie, W.; Chu, X.; Crawford, H. J.; Csanád, M.; Daugherity, M.; Dedovich, T. G.; Deppner, I. M.; Derevschikov, A. A.; Didenko, L.; Dong, X.; Drachenberg, J. L.; Dunlop, J. C.; Edmonds, T.; Elsey, N.; Engelage, J.; Eppley, G.; Esumi, S.; Evdokimov, O.; Ewigleben, A.; Eyser, O.; Fatemi, R.; Fazio, S.; Federic, P.; Fedorišin, J.; Feng, C.; Feng, Y.; Filip, P.; Finch, E.; Fisyak, Y.; Francisco, A.; Fulek, Ł.; Gagliardi, C. A.; Galatyuk, T.; Geurts, F. J. M.; Gibson, A.; Gopal, K.; Gou, X.; Grosnick, D.; Guryn, W.; Hamad, A. I.; Hamed, A.; Harabasz, S.; Harris, J. W.; He, S.; He, W.; He, X.; He, Yang; Heppelmann, S.; Herrmann, N.; Hoffman, Eric A.; Holub, L.; Hong, Yifan; Horvat, S.; Hu, Y.; Huang, H. Z.; Huang, S.; Huang, T.; Huang, X.; Humanic, T. J.; Huo, P.; Igo, G.; Isenhower, D.; Jacobs, W. W.; Jena, C.; Jentsch, A.; Ji, Y.; Jia, J.; Jiang, K.; Jowzaee, S.; Ju, X.; Judd, E. G.; Kabana, S.; Kabir, M. L.; Kagamaster, S.; Kalinkin, D.; Kang, K.; Kapukchyan, D.; Kauder, K.; Ke, H. W.; Keane, D.; Kechechyan, A.; Kelsey, M.; Khyzhniak, Y. V.; Kikoła, D. P.; Kim, C.; Kimelman, B.; Kincses, D.; Kinghorn, T. A.; Kisel, I.; Kiselev, A.; Kocan, M.; Kochenda, L.; Koetke, D. D.; Kosarzewski, L. K.; Kramárik, L.; Кравцов, П.; Krueger, K.; Mudiyanselage, N. Kulathunga; Kumar, L.; Kumar, Sanjeev; Elayavalli, Raghav Kunnawalkam; Kwasizur, J. H.; Lacey, R.; Lan, S.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; Lednický, R.; Lee, J. H.; Leung, Y. H.; Li, C.; Li, W.; Li, X.; Li, Y.; Liang, Y.; Licenik, R.; Lin, T. H.; Lin, Y.; Lisa, M. A.; Liu, F.; Liu, H.; Liu, P.; Liu, T.; Liu, X.; Liu, Y.; Liu, Z.; Ljubičić, T.; Llope, W. J.; Longacre, R. S.; Lukow, N. S.; Luo, S.; Luo, X.; L., G.; Ma, L.; Ma, R.; G., Y.; Magdy, N.; Majka, R.; Mallick, Dukhishyam; Margetis, S.; Markert, C.; Matis, H. S.; Mazer, J.; Minaev, N. G.; Mioduszewski, S.; Mohanty, B.; Mooney, I.; Moravcová, Z.; Морозов, Д. А.; Nagy, M. I.; Nam, J. D.; Nasim, Md.; Nayak, K.; Neff, D.; Nelson, J. M.; Nemes, D. B.; Nie, M.; Nigmatkulov, G.; Niida, T.; Nogach, L. V.; Nonaka, T.; Nunes, A. S.; Odyniec, G.; Ogawa, A.; Oh, S. B.; Окороков, В. А.; Page, B. S.; Pak, R.; Pandav, A.; Panebratsev, Y.; Pawlik, B.; Pawłowska, D.; Pei, H.; Perkins, C.; Pinsky, L.; Pintér, R. L.; Pluta, J.; Porter, J.; Posik, M.; Pruthi, N. K.; Przybycień, M.; Putschke, J.; Qiu, H.; Quintero, A.; Radhakrishnan, S. K.; Ramachandran, S.; Ray, R. L.; Reed, R.; Ritter, H. G.; Rogachevskiy, O. V.; Romero, J. L.; Ruan, L.; Rusňák, J.; Sahoo, N.; Sako, H.; Salur, S.; Sandweiss, J.; Sato, Susumu; Schmidke, W. B.; Schmitz, N.; Schweid, B. R.; Seck, F.; Seger, J.; Sergeeva, M.; Seto, R.; Seyboth, P.; Shah, N.; Shahaliev, E.; Shanmuganathan, P. V.; Shao, M.; Sheikh, A. I.; Shen, W. Q.; Shi, S. S.; Shi, Y.; Shou, Q.; Sichtermann, E. P.; Sikora, R.; Simko, M.; Singh, J. B.; Singha, S.; Smirnov, N.; Solyst, W.; Sorensen, P.; Spinka, H.; Srivastava, B.; Stanislaus, T. D. S.; Stefaniak, M.; Stewart, David J.; Strikhanov, M.; Stringfellow, B.; Suaide, A. A. P.; Šumbera, M.; Summa, B.; Sun, X. M.; Sun, X.; Sun, Y. J.; Surrow, B.; Svirida, D. N.; Szymański, P.; Tang, A. H.; Tang, Z.; Taranenko, A.; Tarnowsky, T.; Thomas, J. H.; Timmins, A. R.; Tlusty, D.; Tokarev, M.; Tomkiel, C. A.; Trentalange, S.; Tribble, R. E.; Tribedy, P.; Tripathy, S. K.; Tsai, O. D.; Tu, Z.; Ullrich, T.; Underwood, D. G.; Upsal, I.; Buren, G. Van; Vaněk, J.; Vasiliev, A.; Vassiliev, I.; Videbæk, F.; Vokál, S.; Voloshin, S. A.; Wang, F.; Wang, G.; Wang, J. S.; Wang, P.; Wang, Y.; Wang, Z.; Webb, J. C.; Weidenkaff, P. C.; Wen, L.; Westfall, G. D.; Wieman, H.; Wissink, S. W.; Witt, R.; Wu, Y.; Zhang, Xiao; Xie, G.; Xie, W.; Xu, H.; Xu, N.; Xu, Q. H.; Xu, Y.; Xu, Y.; Xu, Z.; Yang, C.; Yang, Q.; Yang, S.; Yang, Yi; Yang, Z.; Ye, Z.; Yi, L.; Yip, K.; Yu, Y.; Zbroszczyk, H.; Zha, W.; Zhang, C.; Zhang, D.; Zhang, S.; Zhang, X. P.; Zhang, Y.; Zhang, Z. J.; Zhang, Z.; Zhao, J.; Chen, Zhong; Zhou, C.; Zhu, X.; Zhu, Z. H.; Żurek, M.; Zyzak, M.

doi:10.1103/physrevd.103.012001

Cited by 22 publications

(19 citation statements)

References 69 publications

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“…At the Relativistic Heavy Ion Collider (RHIC), where measurements have been performed at s = 500 and 510 GeV [6], W bosons are identified via their lepton W ± → e ± ν decays, without detecting the accompanying (anti)neutrino. Combined with decay kinematics, the observed W cross sections at lepton pseudorapidity −1 ≤ η e ≤ 1.5 are sensitive to the unpolarized quark distributions in the region 0.05 < x < 0.3.…”

Section: Weak Boson Production In Proton-proton Collisionsmentioning

confidence: 99%

“…Recent measurements by the SeaQuest collaboration [5] provide new insight into the light antiquark distributions by extending the large x coverage of earlier experiments. At the same time new data on W boson production in p + p collisions by the STAR collaboration [6] offer an alternative way to probe the light antiquark sea in the proton at x ≈ 0.2. Indeed, due to the V − A structure of the weak interaction the W boson only couples to left-handed quarks and right-handed antiquarks, and correlates the charge of the produced W with initial state quark flavors.…”

Section: Introductionmentioning

confidence: 99%

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CJ15 global PDF analysis with new electroweak data from the STAR and SeaQuest experiments

Park,

Accardi,

Jing

et al. 2021

Preprint

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We present updates to a recent CTEQ-Jefferson Lab (CJ) global analysis of parton distribution functions with a new set of electroweak data that provide unique access to quark flavor separation in the proton. In particular, recent W and Z boson measurements from the STAR experiment at RHIC put additional constraints on light quarks and antiquarks near the valence regime. The new measurement of the Drell-Yan lepton pair production ratio in p + p and p + d collisions by the SeaQuest experiment at Fermilab extends the large-x coverage of the previous E866 experiment and sheds new light on the light antiquarks distribution. In this report, the impact of these new data sets on parton distribution functions will be presented with emphasis given to the flavor asymmetry of the light antiquark sea at large values of the parton momentum x .

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Section: Weak Boson Production In Proton-proton Collisionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CJ15 global PDF analysis with new electroweak data from the STAR and SeaQuest experiments

Park,

Accardi,

Jing

et al. 2021

Preprint

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“…Beyond DIS, we include Drell-Yan di-muon data from pp and pD collisions from the NuSea [33,35] and SeaQuest [37] experiments at Fermilab. For weak vector boson mediated processes, we use Z/γ * cross sections and reconstructed W asymmetries from the CDF and D0 Collaborations at the Tevatron [61][62][63][64]; W ± -lepton asymmetries from CMS [65][66][67][68] and LHCb [69,70] at the LHC; and the ratio of W + -lepton to W − -lepton cross sections from STAR [38] at RHIC. Finally, we include jet production data from CDF [71], D0 [72], and STAR [73].…”

Section: Quality Of Fitmentioning

confidence: 99%

“…The most recent high-precision data from the STAR Collaboration at RHIC [38] on the ratios of W -lepton production cross sections have not yet been included in global QCD analyses. Since RHIC has a lower centerof-mass energy of √ S = 0.51 TeV compared to the Tevatron ( √ S = 1.96 TeV) and the LHC ( √ S ≥ 7 TeV), these data are sensitive to parton distributions at higher values of x, which can potentially provide information on the distributions of light sea quarks in this difficult to measure region.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we present the results of a global QCD analysis using the JAM Bayesian Monte Carlo framework, including the new measurements from SeaQuest [37] and STAR [38]. By combining these data with other hadron collider data from Fermilab and the LHC, and with DIS data from fixed-target and collider experiments, we are able to place strong constraints on the light-quark PDFs and assess the impact of the new data on the antiquark asymmetry d − ū.…”

Section: Introductionmentioning

confidence: 99%

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Bayesian Monte Carlo extraction of sea asymmetry with SeaQuest and STAR data

Cocuzza,

Melnitchouk,

Metz

et al. 2021

Preprint

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We perform a global QCD analysis of unpolarized parton distributions within a Bayesian Monte Carlo framework, including the new W -lepton production data from the STAR Collaboration at RHIC and Drell-Yan di-muon data from the SeaQuest experiment at Fermilab. We assess the impact of these two new measurements on the light antiquark sea in the proton, and the d − ū asymmetry in particular. The SeaQuest data are found to significantly reduce the uncertainty on the d/ū ratio at large parton momentum fractions x, strongly favoring an enhanced d sea up to x ≈ 0.4, in general agreement with nonperturbative calculations based on chiral symmetry breaking in QCD.

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