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Measurement of the forward-backward asymmetry of Lambda and (Lambda)over-bar production in p(p)over-bar collisions
Joint Inst Nucl Res, Dubna, Russia..
Univ Oklahoma, Norman, OK 73019 USA..
Tata Inst Fundamental Res, Homi Bhabha Rd, Mumbai 400005, Maharashtra, India..
Univ Illinois, Chicago, IL 60607 USA..
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2016 (English)In: PHYSICAL REVIEW D, ISSN 2470-0010, Vol. 93, no 3, 032002Article in journal (Refereed) PublishedText
Abstract [en]

We study Lambda and (Lambda) over bar production asymmetries in p (p) over bar -> Lambda((Lambda) over bar )X, p (p) over bar -> J/psi Lambda((Lambda) over bar )X, and p (p) over bar -> mu(+/-)Lambda((Lambda) over bar )X events recorded by the D0 detector at the Fermilab Tevatron collider at root s = 1.96 TeV. We find an excess of Lambda's ((Lambda) over bar 's) produced in the proton (antiproton) direction. This forward-backward asymmetry is measured as a function of rapidity. We confirm that the (Lambda) over bar/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.

Place, publisher, year, edition, pages
2016. Vol. 93, no 3, 032002
National Category
Subatomic Physics
URN: urn:nbn:se:uu:diva-280253DOI: 10.1103/PhysRevD.93.032002ISI: 000369731800001OAI: oai:DiVA.org:uu-280253DiVA: diva2:914448

Funding: We thank the staffs at Fermilab and collaborating institutions, and acknowledge support from the Department of Energy and National Science Foundation (U.S.); the Alternative Energies and Atomic Energy Commission and the National Center for Scientific Research/National Institute of Nuclear and Particle Physics (France); the Ministry of Education and Science of the Russian Federation, the National Research Center "Kurchatov Institute" of the Russian Federation, and the Russian Foundation for Basic Research (Russia); the National Council for the Development of Science and Technology and the Carlos Chagas Filho Foundation for the Support of Research in the State of Rio de Janeiro (Brazil); the Department of Atomic Energy and the Department of Science and Technology (India); the Administrative Department of Science, Technology and Innovation (Colombia); the National Council of Science and Technology (Mexico); the National Research Foundation of Korea (Korea); the Foundation for Fundamental Research on Matter (Netherlands); the Science and Technology Facilities Council and The Royal Society (United Kingdom); the Ministry of Education, Youth and Sports (Czech Republic); Bundesministerium fur Bildung und Forschung (the Federal Ministry of Education and Research) and Deutsche Forschungsgemeinschaft (the German Research Foundation) (Germany); Science Foundation Ireland (Ireland); the Swedish Research Council (Sweden); China Academy of Sciences and the National Natural Science Foundation of China (China); and the Ministry of Education and Science of Ukraine (Ukraine).

Available from: 2016-03-24 Created: 2016-03-09 Last updated: 2016-03-24Bibliographically approved

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Subatomic Physics

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