Observation of Transverse Spin-Dependent Azimuthal Correlations of Charged Pion Pairs in p↑+p at s√=200 GeV

Adamczyk, L. and Planinić, Mirko and Poljak, Nikola and Zyzak, M. (STAR Collaboration) (2015) Observation of Transverse Spin-Dependent Azimuthal Correlations of Charged Pion Pairs in p↑+p at s√=200 GeV. Physical Review Letters, 115 (24). pp. 242501-7. ISSN 0031-9007

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Abstract

We report the observation of transverse polarization-dependent azimuthal correlations in charged pion pair production with the STAR experiment in p↑+p collisions at RHIC. These correlations directly probe quark transversity distributions. We measure signals in excess of 5 standard deviations at high transverse momenta, at high pseudorapidities η>0.5, and for pair masses around the mass of the ρ meson. This is the first direct transversity measurement in p+p collisions.

Item Type: Article
Keywords: STAR, correlations
Date: 8 December 2015
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2015 American Physical Society. Received 2 April 2015; published 8 December 2015.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 12 Mar 2017 13:08
Last Modified: 12 Mar 2017 13:08
URI: http://digre.pmf.unizg.hr/id/eprint/5441

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