@article{aa780c70c13841079659e873a9e4b5d5,
title = "Measurement of Direct-Photon Cross Section and Double-Helicity Asymmetry at s =510 GeV in p → + p → Collisions",
abstract = "We present measurements of the cross section and double-helicity asymmetry ALL of direct-photon production in p→+p→ collisions at s=510 GeV. The measurements have been performed at midrapidity (|η|<0.25) with the PHENIX detector at the Relativistic Heavy Ion Collider. At relativistic energies, direct photons are dominantly produced from the initial quark-gluon hard scattering and do not interact via the strong force at leading order. Therefore, at s=510 GeV, where leading-order-effects dominate, these measurements provide clean and direct access to the gluon helicity in the polarized proton in the gluon-momentum-fraction range 0.02",
author = "Abdulameer, {N. J.} and U. Acharya and A. Adare and C. Aidala and Ajitanand, {N. N.} and Y. Akiba and R. Akimoto and M. Alfred and N. Apadula and Y. Aramaki and H. Asano and Atomssa, {E. T.} and Awes, {T. C.} and B. Azmoun and V. Babintsev and M. Bai and Bandara, {N. S.} and B. Bannier and Barish, {K. N.} and S. Bathe and A. Bazilevsky and M. Beaumier and S. Beckman and R. Belmont and A. Berdnikov and Y. Berdnikov and L. Bichon and D. Black and B. Blankenship and Bok, {J. S.} and V. Borisov and K. Boyle and Brooks, {M. L.} and J. Bryslawskyj and H. Buesching and V. Bumazhnov and S. Campbell and {Canoa Roman}, V. and Chen, {C. H.} and M. Chiu and Chi, {C. Y.} and Choi, {I. J.} and Choi, {J. B.} and T. Chujo and Z. Citron and M. Connors and R. Corliss and {Corrales Morales}, Y. and M. Csan{\'a}d and T. Cs{\"o}rgo and A. Milov and I. Ravinovich and I. Tserruya",
note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society.",
year = "2023",
month = jun,
day = "23",
doi = "10.1103/PhysRevLett.130.251901",
language = "American English",
volume = "130",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Institute of Physics",
number = "25",
}