Cross section and longitudinal single-spin asymmetry AL for forward W± →μ±ν production in polarized p+p collisions at s =510 GeV

A. Adare, C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, J. Alexander, M. Alfred, K. Aoki, N. Apadula, Y. Aramaki, H. Asano, E. T. Atomssa, T. C. Awes, B. Azmoun, V. Babintsev, A. Bagoly, M. Bai, X. Bai, N. S. Bandara, B. BannierK. N. Barish, S. Bathe, V. Baublis, C. Baumann, S. Baumgart, A. Bazilevsky, M. Beaumier, S. Beckman, R. Belmont, A. Berdnikov, Y. Berdnikov, D. Black, D. S. Blau, M. Boer, J. S. Bok, K. Boyle, M. L. Brooks, J. Bryslawskyj, H. Buesching, V. Bumazhnov, S. Butsyk, S. Campbell, V. Canoa Roman, C. H. Chen, C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, S. Choi, P. Christiansen, T. Chujo, V. Cianciolo, Z. Citron, B. A. Cole, M. Connors, N. Cronin, N. Crossette, M. Csanád, T. Csörgo, T. W. Danley, A. Datta, M. S. Daugherity, G. David, K. Deblasio, K. Dehmelt, A. Denisov, A. Deshpande, E. J. Desmond, L. Ding, A. Dion, J. H. Do, L. D'Orazio, O. Drapier, A. Drees, K. A. Drees, J. M. Durham, A. Durum, T. Engelmore, A. Enokizono, H. En'Yo, S. Esumi, K. O. Eyser, B. 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Woody, M. Wysocki, B. Xia, C. Xu, Q. Xu, L. Xue, S. Yalcin, Y. L. Yamaguchi, R. Yang, A. Yanovich, S. Yokkaichi, J. H. Yoo, I. Yoon, Z. You, I. Younus, H. Yu, I. E. Yushmanov, W. A. Zajc, A. Zelenski, S. Zharko, S. Zhou, L. Zou

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19 Scopus citations

Abstract

We have measured the cross section and single-spin asymmetries from forward W±→μ±ν production in longitudinally polarized p+p collisions at s=510 GeV using the PHENIX detector at the Relativistic Heavy Ion Collider. The cross sections are consistent with previous measurements at this collision energy, while the most forward and backward longitudinal single spin asymmetries provide new insights into the sea quark helicities in the proton. The charge of the W bosons provides a natural flavor separation of the participating partons.

Original languageEnglish
Article number032007
JournalPhysical Review D
Volume98
Issue number3
DOIs
StatePublished - Aug 1 2018

Funding

We thank the staff of the Collider-Accelerator and Physics Departments at Brookhaven National Laboratory and the staff of the other PHENIX participating institutions for their vital contributions. We also thank D. DeFlorian and E. Nocera for their support in setting up the che W simulations with their NNPDFpol inclusion and W. Vogelsang for many insightful discussions since before the actual measurements were recorded and analyzed. We acknowledge support from the Office of Nuclear Physics in the Office of Science of the Department of Energy, the National Science Foundation, Abilene Christian University Research Council, Research Foundation of SUNY, and Dean of the College of Arts and Sciences, Vanderbilt University (U.S.A), Ministry of Education, Culture, Sports, Science, and Technology and the Japan Society for the Promotion of Science (Japan), Conselho Nacional de Desenvolvimento Científico e Tecnológico and Fundação de Amparo à Pesquisa do Estado de São Paulo (Brazil), Natural Science Foundation of China (People’s Republic of China), Croatian Science Foundation and Ministry of Science and Education (Croatia), Ministry of Education, Youth and Sports (Czech Republic), Centre National de la Recherche Scientifique, Commissariat à l’Énergie Atomique, and Institut National de Physique Nucléaire et de Physique des Particules (France), Bundesministerium für Bildung und Forschung, Deutscher Akademischer Austausch Dienst, and Alexander von Humboldt Stiftung (Germany), J. Bolyai Research Scholarship, EFOP, the New National Excellence Program (ÚNKP), NKFIH, and OTKA (Hungary), Department of Atomic Energy and Department of Science and Technology (India), Israel Science Foundation (Israel), Basic Science Research Program through NRF of the Ministry of Education (Korea), Physics Department, Lahore University of Management Sciences (Pakistan), Ministry of Education and Science, Russian Academy of Sciences, Federal Agency of Atomic Energy (Russia), VR and Wallenberg Foundation (Sweden), the U.S. Civilian Research and Development Foundation for the Independent States of the Former Soviet Union, the Hungarian American Enterprise Scholarship Fund, the US-Hungarian Fulbright Foundation, and the US-Israel Binational Science Foundation.

FundersFunder number
Abilene Christian University Research Council
Centre National de la Recherche Scientifique, Commissariat à l’Énergie Atomique
Department of Atomic Energy and Department of Science and Technology (India), Israel Science Foundation
Research Foundation of SUNY
US-Hungarian Fulbright Foundation
Wallenberg Foundation
National Science Foundation1812377, 1712953, 1507841
National Science Foundation
U.S. Department of Energy
CRDF Global
Alexander von Humboldt-Stiftung
Nuclear Physics
Vanderbilt University
Lahore University of Management Sciences
College of Arts and Sciences, Boston University
Department of Physics, Harvard University
Hungarian-American Enterprise Scholarship Fund
Deutscher Akademischer Austauschdienst
Japan Society for the Promotion of Science15H03664, 16K17701
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
United States-Israel Binational Science Foundation
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China
Ministerstvo Školství, Mládeže a Tělovýchovy
Bundesministerium für Bildung und Forschung
Russian Academy of Sciences
Ministry of Education
Haridus- ja Teadusministeerium
Hungarian Scientific Research Fund
Conselho Nacional de Desenvolvimento Científico e Tecnológico
National Research Foundation of Korea
Vetenskapsrådet
Hrvatska Zaklada za Znanost
Ministry of Education and Science
Nemzeti Kutatási Fejlesztési és Innovációs Hivatal
Institut National de Physique Nucléaire et de Physique des Particules
Federal Agency of Atomic Energy of the Russian Federation

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