Measurement of the forward-backward asymmetry of $\Lambda$ and $\bar{\Lambda}$ production in $p \bar{p}$ collisions

Abazov, Victor Mukhamedovich

doi:10.1103/PhysRevD.93.032002

Title: Measurement of the forward-backward asymmetry of $$\Lambda$$ and $$\bar{\Lambda}$$ production in $$p \bar{p}$$ collisions

Abstract

Here, we study $$\Lambda$$ and $$\bar{\Lambda}$$ production asymmetries in $$p \bar{p} \rightarrow \Lambda (\bar{\Lambda}) X$$, $$p \bar{p} \rightarrow J/\psi \Lambda (\bar{\Lambda}) X$$, and $$p \bar{p} \rightarrow \mu^\pm \Lambda (\bar{\Lambda}) X$$ events recorded by the D0 detector at the Fermilab Tevatron collider at $$\sqrt{s} = 1.96$$ TeV. We find an excess of $$\Lambda$$'s ($$\bar{\Lambda}$$'s) produced in the proton (antiproton) direction. This forward-backward asymmetry is measured as a function of rapidity. We confirm that the $$\bar{\Lambda}/\Lambda$$ production ratio, measured by several experiments with various targets and a wide range of energies, is a universal function of "rapidity loss", i.e., the rapidity difference of the beam proton and the lambda.

Authors:

Abazov, Victor Mukhamedovich ^[1]

Joint Institute for Nuclear Research, Dubna (Russia). et al.

Publication Date:: Tue Feb 09 00:00:00 EST 2016

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: D0 Collaboration

OSTI Identifier:: 1247504

Alternate Identifier(s):: OSTI ID: 1237505

Report Number(s):: FERMILAB-PUB-15-496-E; arXiv:1511.05113
Journal ID: ISSN 2470-0010; PRVDAQ; 1404885

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review D

Additional Journal Information:: Journal Volume: 93; Journal Issue: 3; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Abazov, Victor Mukhamedovich. Measurement of the forward-backward asymmetry of $\Lambda$ and $\bar{\Lambda}$ production in $p \bar{p}$ collisions.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevD.93.032002.

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                    Abazov, Victor Mukhamedovich. Measurement of the forward-backward asymmetry of $\Lambda$ and $\bar{\Lambda}$ production in $p \bar{p}$ collisions.  United States.  https://doi.org/10.1103/PhysRevD.93.032002

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                    Abazov, Victor Mukhamedovich. Tue .  
"Measurement of the forward-backward asymmetry of $\Lambda$ and $\bar{\Lambda}$ production in $p \bar{p}$ collisions".  United States.  https://doi.org/10.1103/PhysRevD.93.032002.  https://www.osti.gov/servlets/purl/1247504.

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@article{osti_1247504,

  title        = {Measurement of the forward-backward asymmetry of $\Lambda$ and $\bar{\Lambda}$ production in $p \bar{p}$ collisions},

  author       = {Abazov, Victor Mukhamedovich},

  abstractNote = {Here, we study $\Lambda$ and $\bar{\Lambda}$ production asymmetries in $p \bar{p} \rightarrow \Lambda (\bar{\Lambda}) X$, $p \bar{p} \rightarrow J/\psi \Lambda (\bar{\Lambda}) X$, and $p \bar{p} \rightarrow \mu^\pm \Lambda (\bar{\Lambda}) X$ events recorded by the D0 detector at the Fermilab Tevatron collider at $\sqrt{s} = 1.96$ TeV. We find an excess of $\Lambda$'s ($\bar{\Lambda}$'s) produced in the proton (antiproton) direction. This forward-backward asymmetry is measured as a function of rapidity. We confirm that the $\bar{\Lambda}/\Lambda$ production ratio, measured by several experiments with various targets and a wide range of energies, is a universal function of "rapidity loss", i.e., the rapidity difference of the beam proton and the lambda.},

  doi          = {10.1103/PhysRevD.93.032002},

  journal      = {Physical Review D},

  number       = 3,

  volume       = 93,

  place        = {United States},

  year         = {Tue Feb 09 00:00:00 EST 2016},

  month        = {Tue Feb 09 00:00:00 EST 2016}

}

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Figures / Tables:

TABLE I: Number of reconstructed Λ plus $\bar{Λ}$ or K_S with p_T > 2.0 GeV in each data set.

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Works referencing / citing this record:

Measurement of the forward-backward asymmetries in the production of $Ξ$ and $Ω$ baryons in $p \bar{p}$ collisions
journal, June 2016

Abazov, V. M.; Abbott, B.; Acharya, B. S.
Physical Review D, Vol. 93, Issue 11
DOI: 10.1103/physrevd.93.112001

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