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

Salamu, Y.; Ji, Chueng-Ryong; Melnitchouk, W.; Thomas, A. W.; Wang, P.; Wang, X. G.

doi:10.1103/PhysRevD.100.094026

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

Abstract

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 $$n$$, $$\Delta^{++}$$, $$\Lambda$$ and $$\Sigma^{*+}$$ baryons in $pp$ collisions, we compute the shape of the light antiquark asymmetry $$\bar{d}-\bar{u}$$ in the proton and the strange asymmetry $$s-\bar{s}$$ in the nucleon sea. With these constraints, the magnitude of the $$\bar{d}-\bar{u}$$ 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 $$\langle \bar d-\bar u \rangle \approx 0.09-0.17$$. The $$s-\bar s$$ 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 $$\langle x (s-\bar s) \rangle \approx (0.9-2.5) \times 10^{-3}$$.

Authors:

;

; Wang, X. G.

Publication Date:: Thu Nov 21 00:00:00 EST 2019

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1607573

Alternate Identifier(s):: OSTI ID: 1575204

Report Number(s):: JLAB-THY-19-2996; DOE/OR/23177-4747; arXiv:1907.08551
Journal ID: ISSN 2470-0010; PRVDAQ; 094026

Grant/Contract Number:: AC05-06OR23177; FG02-03ER41260; 11475186; 11621131001; CE110001104; DP151103101; DP180100497

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 9; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Salamu, Y., Ji, Chueng-Ryong, Melnitchouk, W., Thomas, A. W., Wang, P., and Wang, X. G. Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevD.100.094026.

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                    Salamu, Y., Ji, Chueng-Ryong, Melnitchouk, W., Thomas, A. W., Wang, P., & Wang, X. G. Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries.  United States.  https://doi.org/10.1103/PhysRevD.100.094026

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                    Salamu, Y., Ji, Chueng-Ryong, Melnitchouk, W., Thomas, A. W., Wang, P., and Wang, X. G. Thu .  
"Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries".  United States.  https://doi.org/10.1103/PhysRevD.100.094026.

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@article{osti_1607573,

  title        = {Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries},

  author       = {Salamu, Y. and Ji, Chueng-Ryong and Melnitchouk, W. and Thomas, A. W. and Wang, P. and Wang, X. G.},

  abstractNote = {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 $n$, $\Delta^{++}$, $\Lambda$ and $\Sigma^{*+}$ baryons in $pp$ collisions, we compute the shape of the light antiquark asymmetry $\bar{d}-\bar{u}$ in the proton and the strange asymmetry $s-\bar{s}$ in the nucleon sea. With these constraints, the magnitude of the $\bar{d}-\bar{u}$ 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 $\langle \bar d-\bar u \rangle \approx 0.09-0.17$. The $s-\bar s$ 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 $\langle x (s-\bar s) \rangle \approx (0.9-2.5) \times 10^{-3}$.},

  doi          = {10.1103/PhysRevD.100.094026},

  journal      = {Physical Review D},

  number       = 9,

  volume       = 100,

  place        = {United States},

  year         = {Thu Nov 21 00:00:00 EST 2019},

  month        = {Thu Nov 21 00:00:00 EST 2019}

}

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

Abstract

Citation Formats

Pionic parton distributions journal, December 1992

Flavour and spin of the proton and the meson cloud journal, January 1996

Progress in the Determination of the Partonic Structure of the Proton journal, October 2013

SU(3) chiral perturbation theory expansion of moments of quark distributions journal, June 2013

Measurement of inclusive zero-angle neutron spectra at the CERN ISR journal, June 1976

A new test for random events of an exponential distribution journal, January 2000

Charge Asymmetry of Parton Distributions journal, June 1994

Nonperturbative contribution to the strange-antistrange asymmetry of the nucleon sea journal, March 2016

Strange-quark asymmetry in the proton in chiral effective theory journal, November 2016

Study of the isospin symmetry breaking in the light quark sea of the nucleon from the Drell-Yan process journal, July 1994

The sea of quarks and antiquarks in the nucleon journal, March 2019

Determination of the strange quark content of the nucleon from a next-to-leading-order QCD analysis of neutrino charm production journal, June 1995

Inclusive production of Σ±(1385) in pp interactions at 12 and 24 GeV/c journal, October 1978

Measurement of neutrino and antineutrino structure functions in hydrogen and iron journal, March 1984

An investigation of the spin structure of the proton in deep inelastic scattering of polarised muons on polarised protons journal, December 1989

Constructing Parton Convolution in Effective Field Theory journal, September 2001

d ¯ − u ¯ Asymmetry in the Proton in Chiral Effective Theory journal, March 2015

Study of the reaction p + p → Δ + + ( 1236 ) + X 0 at 205 GeV/ c journal, September 1975

Measurement of the Nucleon Strange-Antistrange Asymmetry at Next-to-Leading Order in QCD from NuTeV Dimuon Data journal, November 2007

Parton distributions for the pion extracted from Drell-Yan and prompt photon experiments journal, April 1992

Parton momentum and helicity distributions in the nucleon journal, August 2013

Pion structure function at small x from deep-inelastic scattering data journal, June 2012

Nucleon electromagnetic form factors with a nonlocal chiral effective Lagrangian journal, February 2018

Perturbative and nonperturbative contributions to the strange quark asymmetry in the nucleon journal, December 2012

Role of vector mesons in high- Q 2 lepton-nucleon scattering journal, May 1993

Parton distributions from nonlocal chiral SU(3) effective theory: Splitting functions journal, January 2019

Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry journal, March 2016

Inclusive γ , π 0 , K 0 , and Λ production in 12.4-GeV/ c p p interactions journal, April 1975

Q 2 -dependent parametrizations of pion parton distribution functions journal, September 1984

Parton propagation and fragmentation in QCD matter journal, December 2009

Erratum: Precise Determination of Electroweak Parameters in Neutrino-Nucleon Scattering [Phys. Rev. Lett. 88 , 091802 (2002)] journal, June 2003

Determination of polarized parton densities from a QCD analysis of inclusive and semi-inclusive deep inelastic scattering data journal, December 2010

Improved measurement of the d ¯ / ū asymmetry in the nucleon sea journal, August 2001

Uniqueness of the Interaction Involving Spin- 3 2 Particles journal, May 1971

d ¯ − ū asymmetry of the proton in a pion cloud model approach journal, February 2000

Soft-Gluon Resummation and the Valence Parton Distribution Function of the Pion journal, December 2010

Isovector EMC Effect and the NuTeV Anomaly journal, June 2009

Flavor Asymmetry of the Light Quark Sea from Semi-inclusive Deep-Inelastic Scattering journal, December 1998

On chiral corrections to nucleon GPD journal, February 2013

Reassessment of the NuTeV determination of the weak mixing angle journal, October 2010

Comparison of the structure function F 2 as measured by charged lepton and neutrino scattering from iron targets journal, September 2017

Total cross sections of π±, K±, p and on protons and deuterons between 200 and 370 GeV/c journal, January 1979

Old and new physics interpretations of the NuTeV anomaly journal, February 2002

Measurement of the production of a W boson in association with a charm quark in pp collisions at $ \sqrt{s} $ = 7 TeV with the ATLAS detector journal, May 2014

Determination of the parton distributions and structure functions of the proton from neutrino and antineutrino reactions on hydrogen and deuterium journal, December 1994

NuTeV ANOMALY VERSUS STRANGE-ANTISTRANGE ASYMMETRY journal, February 2006

A limit on the pionic component of the nucleon through SU(3) flavour breaking in the sea journal, June 1983

Pion momentum distributions in the nucleon in chiral effective theory journal, March 2013

Pion parton distribution function in the valence region journal, December 2005

Erratum: Constructing Parton Convolution in Effective Field Theory [Phys. Rev. Lett. 87, 152002 (2001)] journal, May 2002

Reevaluation of the Gottfried sum journal, July 1994

First Monte Carlo Global QCD Analysis of Pion Parton Distributions journal, October 2018

Strangeness in the nucleon on the light cone journal, January 1997

Baryon masses in chiral perturbation theory journal, January 1992

Chiral Symmetry and the BAG Model: A New Starting Point for Nuclear Physics book, January 1984

Diffractive elastic scattering and hadronic radii: Geometric and Pomeron approaches journal, August 1992

QCD analysis of the ATLAS and CMS W ± and Z cross-section measurements and implications for the strange sea density journal, July 2018

Constraints on the s − s ¯ asymmetry of the proton in chiral effective theory journal, November 2016

Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target journal, April 2017

Measurement of associated W + charm production in pp collisions at $ \sqrt{s} $ = 7 TeV journal, February 2014

Possible strength of the non-perturbative strange sea of the nucleon journal, June 1987

Meson cloud in the nucleon and d−u asymmetry from the Drell-Yan processes journal, April 1994

The theory and phenomenology of perturbative QCD based jet quenching journal, January 2011

Dynamics of light antiquarks in the proton journal, December 1998

A measurement of differential cross-sections and nucleon structure functions in charged-current neutrino interactions on iron journal, June 1991

Quenched chiral perturbation theory for baryons journal, October 1996

Measurement of parton distributions of strange quarks in the nucleon from charged-kaon production in deep-inelastic scattering on the deuteron journal, September 2008

Reevaluation of the parton distribution of strange quarks in the nucleon journal, May 2014

The isospin strange asymmetry from the chiral effective theory journal, May 2018

Cloudy bag model of the nucleon journal, July 1981

Inclusive neutron and lambda production in proton-proton interactions at 12 and 24 GeV/c journal, April 1978

Nonperturbative strange-quark sea from lattice QCD, light-front holography, and meson-baryon fluctuation models journal, December 2018

Anatomy of relativistic pion loop corrections to the electromagnetic nucleon coupling journal, October 2013

Perturbative Generation of a Strange-Quark Asymmetry in the Nucleon journal, October 2004

A new global analysis of deep inelastic scattering data journal, January 2000

Possible explanations for the NuTeV Weinberg angle measurement journal, April 2005

Sum rule for deep-inelastic electroproduction from polarized protons journal, March 1974

Pionic parton distributions
journal, December 1992

Flavour and spin of the proton and the meson cloud
journal, January 1996

Progress in the Determination of the Partonic Structure of the Proton
journal, October 2013

SU(3) chiral perturbation theory expansion of moments of quark distributions
journal, June 2013

Measurement of inclusive zero-angle neutron spectra at the CERN ISR
journal, June 1976

A new test for random events of an exponential distribution
journal, January 2000

Charge Asymmetry of Parton Distributions
journal, June 1994

Nonperturbative contribution to the strange-antistrange asymmetry of the nucleon sea
journal, March 2016

Strange-quark asymmetry in the proton in chiral effective theory
journal, November 2016

Study of the isospin symmetry breaking in the light quark sea of the nucleon from the Drell-Yan process
journal, July 1994

The sea of quarks and antiquarks in the nucleon
journal, March 2019

Determination of the strange quark content of the nucleon from a next-to-leading-order QCD analysis of neutrino charm production
journal, June 1995

Inclusive production of Σ±(1385) in pp interactions at 12 and 24 GeV/c
journal, October 1978

Measurement of neutrino and antineutrino structure functions in hydrogen and iron
journal, March 1984

An investigation of the spin structure of the proton in deep inelastic scattering of polarised muons on polarised protons
journal, December 1989

Constructing Parton Convolution in Effective Field Theory
journal, September 2001

$\bar{d} - \bar{u}$ Asymmetry in the Proton in Chiral Effective Theory
journal, March 2015

Study of the reaction $p + p \to Δ^{+ +} (1236) + X^{0}$ at 205 GeV/ c
journal, September 1975

Measurement of the Nucleon Strange-Antistrange Asymmetry at Next-to-Leading Order in QCD from NuTeV Dimuon Data
journal, November 2007

Parton distributions for the pion extracted from Drell-Yan and prompt photon experiments
journal, April 1992

Parton momentum and helicity distributions in the nucleon
journal, August 2013

Pion structure function at small $x$ from deep-inelastic scattering data
journal, June 2012

Nucleon electromagnetic form factors with a nonlocal chiral effective Lagrangian
journal, February 2018

Perturbative and nonperturbative contributions to the strange quark asymmetry in the nucleon
journal, December 2012

Role of vector mesons in high- $Q^{2}$ lepton-nucleon scattering
journal, May 1993

Parton distributions from nonlocal chiral SU(3) effective theory: Splitting functions
journal, January 2019

Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry
journal, March 2016

Inclusive $γ$ , $π^{0}$ , $K^{0}$ , and $Λ$ production in 12.4-GeV/ c $p p$ interactions
journal, April 1975

$Q^{2}$ -dependent parametrizations of pion parton distribution functions
journal, September 1984

Parton propagation and fragmentation in QCD matter
journal, December 2009

Erratum: Precise Determination of Electroweak Parameters in Neutrino-Nucleon Scattering [Phys. Rev. Lett. 88 , 091802 (2002)]
journal, June 2003

Determination of polarized parton densities from a QCD analysis of inclusive and semi-inclusive deep inelastic scattering data
journal, December 2010

Improved measurement of the $\bar{d} / ū$ asymmetry in the nucleon sea
journal, August 2001

Uniqueness of the Interaction Involving Spin- $\frac{3}{2}$ Particles
journal, May 1971

$\bar{d} - ū$ asymmetry of the proton in a pion cloud model approach
journal, February 2000

Soft-Gluon Resummation and the Valence Parton Distribution Function of the Pion
journal, December 2010

Isovector EMC Effect and the NuTeV Anomaly
journal, June 2009

Flavor Asymmetry of the Light Quark Sea from Semi-inclusive Deep-Inelastic Scattering
journal, December 1998

On chiral corrections to nucleon GPD
journal, February 2013

Reassessment of the NuTeV determination of the weak mixing angle
journal, October 2010

Comparison of the structure function $F_{2}$ as measured by charged lepton and neutrino scattering from iron targets
journal, September 2017

Total cross sections of π±, K±, p and on protons and deuterons between 200 and 370 GeV/c
journal, January 1979

Old and new physics interpretations of the NuTeV anomaly
journal, February 2002

Measurement of the production of a W boson in association with a charm quark in pp collisions at $ \sqrt{s} $ = 7 TeV with the ATLAS detector
journal, May 2014

Determination of the parton distributions and structure functions of the proton from neutrino and antineutrino reactions on hydrogen and deuterium
journal, December 1994

NuTeV ANOMALY VERSUS STRANGE-ANTISTRANGE ASYMMETRY
journal, February 2006

A limit on the pionic component of the nucleon through SU(3) flavour breaking in the sea
journal, June 1983

Pion momentum distributions in the nucleon in chiral effective theory
journal, March 2013

Pion parton distribution function in the valence region
journal, December 2005

Erratum: Constructing Parton Convolution in Effective Field Theory [Phys. Rev. Lett. 87, 152002 (2001)]
journal, May 2002

Reevaluation of the Gottfried sum
journal, July 1994

First Monte Carlo Global QCD Analysis of Pion Parton Distributions
journal, October 2018

Strangeness in the nucleon on the light cone
journal, January 1997

Baryon masses in chiral perturbation theory
journal, January 1992

Chiral Symmetry and the BAG Model: A New Starting Point for Nuclear Physics
book, January 1984

Diffractive elastic scattering and hadronic radii: Geometric and Pomeron approaches
journal, August 1992

QCD analysis of the ATLAS and CMS $W^{\pm}$ and $Z$ cross-section measurements and implications for the strange sea density
journal, July 2018

Constraints on the $s - \bar{s}$ asymmetry of the proton in chiral effective theory
journal, November 2016

Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target
journal, April 2017

Measurement of associated W + charm production in pp collisions at $ \sqrt{s} $ = 7 TeV
journal, February 2014

Possible strength of the non-perturbative strange sea of the nucleon
journal, June 1987

Meson cloud in the nucleon and d−u asymmetry from the Drell-Yan processes
journal, April 1994

The theory and phenomenology of perturbative QCD based jet quenching
journal, January 2011

Dynamics of light antiquarks in the proton
journal, December 1998

A measurement of differential cross-sections and nucleon structure functions in charged-current neutrino interactions on iron
journal, June 1991

Quenched chiral perturbation theory for baryons
journal, October 1996

Measurement of parton distributions of strange quarks in the nucleon from charged-kaon production in deep-inelastic scattering on the deuteron
journal, September 2008

Reevaluation of the parton distribution of strange quarks in the nucleon
journal, May 2014

The isospin strange asymmetry from the chiral effective theory
journal, May 2018

Cloudy bag model of the nucleon
journal, July 1981

Inclusive neutron and lambda production in proton-proton interactions at 12 and 24 GeV/c
journal, April 1978

Nonperturbative strange-quark sea from lattice QCD, light-front holography, and meson-baryon fluctuation models
journal, December 2018

Anatomy of relativistic pion loop corrections to the electromagnetic nucleon coupling
journal, October 2013

Perturbative Generation of a Strange-Quark Asymmetry in the Nucleon
journal, October 2004

A new global analysis of deep inelastic scattering data
journal, January 2000

Possible explanations for the NuTeV Weinberg angle measurement
journal, April 2005

Sum rule for deep-inelastic electroproduction from polarized protons
journal, March 1974

Parton distributions: a new global analysis
journal, July 1998

Effect of asymmetric strange seas and isospin-violating parton distribution functions on $\sin^{2} θ_{W}$ measured in the NuTeV experiment
journal, June 2002

Charge symmetry violation corrections to determination of the Weinberg angle in neutrino reactions
journal, June 2003