Journal
PHYSICAL REVIEW D
Volume 98, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.98.072004
Keywords
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Funding
- Office of Nuclear Physics in the Office of Science of the Department of Energy
- National Science Foundation
- Abilene Christian University Research Council
- Research Foundation of SUNY
- College of Arts and Sciences, Vanderbilt University (United States)
- Ministry of Education, Culture, Sports, Science, and Technology
- Japan Society for the Promotion of Science (Japan)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (Brazil)
- Natural Science Foundation of China (People's Republic of China)
- Croatian Science Foundation
- Ministry of Science and Education (Croatia)
- Ministry of Education, Youth and Sports (Czech Republic)
- Centre National de la Recherche Scientifique
- Commissariat a l'Energie Atomique
- Institut National de Physique Nucleaire et de Physique des Particules (France)
- Bundesministerium fur Bildung und Forschung
- Deutscher Akademischer Austausch Dienst
- Alexander von Humboldt Stiftung (Germany)
- J. Bolyai Research Scholarship
- EFOP
- New National Excellence Program (UNKP)
- NKFIH
- OTKA (Hungary)
- Department of Atomic Energy
- 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
- Wallenberg Foundation (Sweden)
- U.S. Civilian Research and Development Foundation for the Independent States of the Former Soviet Union
- Hungarian American Enterprise Scholarship Fund
- US-Hungarian Fulbright Foundation
- US-Israel Binational Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1308299] Funding Source: National Science Foundation
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Dihadron and isolated direct photon-hadron angular correlations are measured in p + p collisions at root s = 200 GeV. The correlations are sensitive to nonperturbative initial-state and final-state transverse momenta k(T) and j(T) in the azimuthal nearly back-to-back region. Delta phi similar to pi. To have sensitivity to small transverse momentum scales, nonperturbative momentum widths of pout, the out-of-plane transversemomentum component perpendicular to the trigger particle, are measured. In this region, the evolution of pout can be studied when several different hard scales are measured. These widths are used to investigate possible effects from transverse-momentum-dependent factorization breaking. When accounting for the longitudinal-momentum fraction of the away-side hadron with respect to the near-side trigger particle, the widths are found to increase with the hard scale; this is qualitatively similar to the observed behavior in Drell-Yan and semi-inclusive deep-inelastic scattering interactions, where factorization is predicted to hold. The momentum widths are also studied as a function of center-of-mass energy by comparing to previous measurements at root s = 510 GeV. The nonperturbative jet widths also appear to increase with root s at a similar x(T), which is qualitatively consistent to similar measurements in Drell-Yan interactions. Future detailed global comparisons between measurements of processes where transverse-momentum-dependent factorization is predicted to hold and be broken will provide further insight into the role of color in hadronic interactions.
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