Journal
PHYSICAL REVIEW LETTERS
Volume 115, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.242501
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Funding
- Office of Nuclear Physics within the U.S. DOE Office of Science
- U.S. NSF
- Ministry of Education and Science of the Russian Federation
- NNSFC
- CAS
- MoST
- MoE of China
- Korean Research Foundation
- GA and MSMT of the Czech Republic
- FIAS of Germany
- DAE
- DST
- UGC of India
- National Science Centre of Poland
- National Research Foundation
- Ministry of Science, Education and Sports of the Republic of Croatia
- RosAtom of Russia
- Division Of Physics
- Direct For Mathematical & Physical Scien [1505716] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1206009, 1205991] Funding Source: National Science Foundation
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We report the observation of transverse polarization-dependent azimuthal correlations in charged pion pair production with the STAR experiment in p(up arrow) + 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 eta > 0.5, and for pair masses around the mass of the rho meson. This is the first direct transversity measurement in p + p collisions.
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