Reevaluation of the parton distribution of strange quarks in the nucleon

Airapetian, A.; Акопов, Н.; Akopov, Z.; Aschenauer, E. C.; Augustyniak, W.; Avetissian, A.; Avetisyan, E.; Belostotski, S.; Blok, H.P.; Borissov, A.; Bryzgalov, V.; Burns, J.; Capiluppi, M.; Capitani, G. P.; Cisbani, E.; Ciullo, G.; Contalbrigo, M.; Dalpiaz, P.; Deconinck, W.; Лео, Р. Де; Sanctis, E. De; Diefenthaler, M.; Nezza, P. Di; Düren, M.; Ehrenfried, M.; Elbakian, G.; Ellinghaus, F.; Etzelmüller, E.; Felawka, L.; Frullani, S.; Gabbert, D.; Gapienko, G.; Гапиенко, В. А.; García, J. Garay; Garibaldi, F.; Gavrilov, G.; Gharibyan, V.; Giordano, F.; Gliske, S.; Hartig, M.; Hasch, D.; Hoek, M.; Holler, Y.; Hristova, I.; Ivanilov, A.; Jackson, H. E.; Joosten, S.; Kaiser, R.; Karyan, G.; Keri, T.; Kinney, E.; Kisselev, A.; Коротков, В. А.; Kozlov, V.; Kravchenko, P.; Krivokhijine, V. G.; Lagamba, L.; Lapikás, L.; Lehmann, I.; Lenisa, P.; Lorenzon, W.; Lu, X-G; Q., B.; Mahon, D.; Manaenkov, S. I.; Mao, Y.; Mariański, B.; Marukyan, H.; Miyachi, Y.; Movsisyan, A.; Muccifora, V.; Murray, M.; Mussgiller, A.; Naryshkin, Y.; Nass, A.; Negodaev, M.; Nowak, W.-D.; Pappalardo, L. L.; Pérez-Benito, R.; Petrosyan, A.; Reimer, P. E.; Reolon, A. R.; Riedl, C.; Rith, Klaus; Rosner, G.; Rostomyan, A.; Rubin, J.; Ryckbosch, D.; Salomatin, Y.; Schäfer, Andreas; Schnell, G.; Seitz, B.; Shibata, T. A.; Stahl, M.; Statera, M.; Steffens, E.; Steijger, J. J. M.; Stinzing, F.; Taroian, S.; Terkulov, A.; Truty, R.; Trzciński, A.; Tytgat, M.; Haarlem, Y. Van; Hulse, C. Van; Veretennikov, D.; Vikhrov, V.; Vilardi, I.; Vogel, Christian; Wang, S.; Yaschenko, S.; Ye, Z.; Yen, S.; Zihlmann, B.; Żuprański, P.

doi:10.1103/physrevd.89.097101

Cited by 47 publications

(52 citation statements)

References 13 publications

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“…Alternatively, the s ands distributions can be constrained by K ± meson production data from semi-inclusive deep-inelastic scattering (SIDIS) off protons and deuterons, such as from the HERMES [68,69] or COMPASS [70] experiments. In a first of its kind global analysis, the JAM Collaboration recently fitted both the SIDIS and inclusive DIS data, along with other high energy scattering data, within a Bayesian likelihood analysis using Monte Carlo techniques to simultaneously determine both the spin-averaged PDFs and parton-to-hadron fragmentation functions [71].…”

Section: Ad −ū Asymmetrymentioning

confidence: 99%

Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries

Salamu

Melnitchouk

et al. 2019

Phys. Rev. D

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Using recently derived results for one-loop hadronic splitting functions from a nonlocal implementation of chiral effective theory, we study the contributions from pseudoscalar meson loops to flavor asymmetries in the proton. Constraining the parameters of the regulating functions by inclusive production of n, ∆ ++ , Λ and Σ * + baryons in pp collisions, we compute the shape of the light antiquark asymmetryd −ū in the proton and the strange asymmetry s −s in the nucleon sea.With these constraints, the magnitude of thed −ū asymmetry is found to be compatible with that extracted from the Fermilab E866 Drell-Yan measurement, with no indication of a sign change at large values of x, and an integrated value in the range d −ū ≈ 0.09 − 0.17. The s −s asymmetry is predicted to be positive at x > 0, with compensating negative contributions at x = 0, and an integrated x-weighted moment in the range x(s −s) ≈ (0.9 − 2.5) × 10 −3 .

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Section: Ad −ū Asymmetrymentioning

confidence: 99%

Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries

Salamu

Melnitchouk

et al. 2019

Phys. Rev. D

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“…This value of x B corresponds to a final state consisting of the nucleon and hadron h at rest in the hadron's rest frame. For spin-dependent scattering, the polarization vector S µ of the initial state nucleon can be parametrized as 5) and satisfies the conditions p · S = 0 and S 2 = −1. In the case of a longitudinally polarized initial state nucleon (which we consider in this work), one has S L = ±1 and the transverse spin vector S µ T = 0.…”

Section: Jhep09(2015)169mentioning

confidence: 99%

“…The production of kaons, for instance, tags strange or antistrange quarks, and has been used with polarized targets as an independent means of determining the ∆s distribution in the nucleon [7,8], and for unpolarized scattering to determine the magnitude of the s distribution at small x B [4,5]. In figure 8 the spin-averaged and spin-dependent cross section ratios with and without HMCs are shown for the production of charged pions (π + + π − ) and kaons (K + + K − ) at x B = 0.3 and Q 2 = 5 GeV 2 .…”

Section: Kinematical Dependence Of Hmcsmentioning

confidence: 99%

“…Important insights have been provided through semiinclusive deep-inelastic scattering (SIDIS) experiments on phenomena such as the SU (2) flavor asymmetry in the proton sea [3] and the ratio of strange to nonstrange quark distributions [4,5]. From experiments with polarized targets, SIDIS data have also provided fascinating glimpses of the possible flavor asymmetry in the polarized light-antiquark sea [6], while kaon production data has fueled the recent controversy concerning the sign of the polarized strange sea [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Hadron mass corrections in semi-inclusive deep-inelastic scattering

Guerrero

Ethier

Accardi

et al. 2015

J. High Energ. Phys.

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The spin-dependent cross sections for semi-inclusive lepton-nucleon scattering are derived in the framework of collinear factorization, including the effects of masses of the target and produced hadron at finite momentum transfer squared Q 2 . At leading order the cross sections factorize into products of parton distribution and fragmentation functions evaluated in terms of new, mass-dependent scaling variables. The size of the hadron mass corrections is estimated at kinematics relevant for future semi-inclusive deepinelastic scattering experiments.

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“…Therefore, measuring the ratio of the W þ c to W þ jet production cross sections in the forward region at the LHC provides important constraints on the s quark PDF [2,3] at momentum transfers of Q ≈ 100 GeV (c ¼ 1 throughout this article) and momentum fractions down to x ≈ 10 −5 . Previous measurements of the proton s quark PDF were primarily based on deep inelastic scattering experiments with Q ≈ 1 GeV and x values Oð0.1Þ [4][5][6]. The W þ c cross section has been measured at the Tevatron [7,8] and at the LHC [9,10] in the central region.…”

Section: Introductionmentioning

confidence: 99%

Study ofWboson production in association with beauty and charm

Aaij¹,

Adeva²,

Adinolfi³

et al. 2015

Phys. Rev. D

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The associated production of a W boson with a jet originating from either a light parton or heavy-flavor quark is studied in the forward region using proton-proton collisions. The analysis uses data corresponding to integrated luminosities of 1.0 and 2.0 fb −1 collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, respectively. The W bosons are reconstructed using the W → μν decay and muons with a transverse momentum, p T , larger than 20 GeV in the pseudorapidity range 2.0 < η < 4.5. The partons are reconstructed as jets with p T > 20 GeV and 2.2 < η < 4.2. The sum of the muon and jet momenta must satisfy p T > 20 GeV. The fraction of W þ jet events that originate from beauty and charm quarks is measured, along with the charge asymmetries of the W þ b and W þ c production cross sections. The ratio of the W þ jet to Z þ jet production cross sections is also measured using the Z → μμ decay. All results are in agreement with Standard Model predictions.

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Reevaluation of the parton distribution of strange quarks in the nucleon

Cited by 47 publications

References 13 publications

Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries

Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries

Hadron mass corrections in semi-inclusive deep-inelastic scattering

Study ofWboson production in association with beauty and charm

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