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Nonperturbative-transverse-momentum effects and evolution in dihadron and direct photon-hadron angular correlations in p+p collisions at s =510 GeV

Adare, A; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Akimoto, R.; Alexander, J J; Alfred, M.; Andrieux, V.; Aoki, K. and Apadula, N, et al. (2017) In Physical Review D - Particles, Fields, Gravitation and Cosmology 95(7).
Abstract

Dihadron and isolated direct photon-hadron angular correlations are measured in p+p collisions at s=510 GeV. Correlations of charged hadrons of 0.7<pT<10 GeV/c with π0 mesons of 4<pT<15 GeV/c or isolated direct photons of 7<pT<15 GeV/c are used to study nonperturbative effects generated by initial-state partonic transverse momentum and final-state transverse momentum from fragmentation. The nonperturbative behavior is characterized by measuring the out-of-plane transverse momentum component pout perpendicular to the axis of the trigger particle, which is the high-pT direct photon or π0. Nonperturbative evolution effects are extracted from Gaussian fits to the away-side inclusive-charged-hadron yields for different... (More)

Dihadron and isolated direct photon-hadron angular correlations are measured in p+p collisions at s=510 GeV. Correlations of charged hadrons of 0.7<pT<10 GeV/c with π0 mesons of 4<pT<15 GeV/c or isolated direct photons of 7<pT<15 GeV/c are used to study nonperturbative effects generated by initial-state partonic transverse momentum and final-state transverse momentum from fragmentation. The nonperturbative behavior is characterized by measuring the out-of-plane transverse momentum component pout perpendicular to the axis of the trigger particle, which is the high-pT direct photon or π0. Nonperturbative evolution effects are extracted from Gaussian fits to the away-side inclusive-charged-hadron yields for different trigger-particle transverse momenta (pTtrig). The Gaussian widths and root mean square of pout are reported as a function of the interaction hard scale pTtrig to investigate possible transverse-momentum-dependent evolution differences between the π0-h± and direct photon-h± correlations and factorization breaking effects. The widths are found to decrease with pTtrig, which indicates that the Collins-Soper-Sterman soft factor is not driving the evolution with the hard scale in nearly back-to-back dihadron and direct photon-hadron production in p+p collisions. This behavior is in contrast to Drell-Yan and semi-inclusive deep-inelastic scattering measurements.

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Physical Review D - Particles, Fields, Gravitation and Cosmology
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95
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7
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American Physical Society
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  • scopus:85019564142
  • wos:000399390700001
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2470-0010
DOI
10.1103/PhysRevD.95.072002
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English
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18319945-325a-4931-8f45-e6265362f3d9
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2017-06-14 09:46:31
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@article{18319945-325a-4931-8f45-e6265362f3d9,
  abstract     = {<p>Dihadron and isolated direct photon-hadron angular correlations are measured in p+p collisions at s=510 GeV. Correlations of charged hadrons of 0.7&lt;pT&lt;10 GeV/c with π0 mesons of 4&lt;pT&lt;15 GeV/c or isolated direct photons of 7&lt;pT&lt;15 GeV/c are used to study nonperturbative effects generated by initial-state partonic transverse momentum and final-state transverse momentum from fragmentation. The nonperturbative behavior is characterized by measuring the out-of-plane transverse momentum component pout perpendicular to the axis of the trigger particle, which is the high-pT direct photon or π0. Nonperturbative evolution effects are extracted from Gaussian fits to the away-side inclusive-charged-hadron yields for different trigger-particle transverse momenta (pTtrig). The Gaussian widths and root mean square of pout are reported as a function of the interaction hard scale pTtrig to investigate possible transverse-momentum-dependent evolution differences between the π0-h± and direct photon-h± correlations and factorization breaking effects. The widths are found to decrease with pTtrig, which indicates that the Collins-Soper-Sterman soft factor is not driving the evolution with the hard scale in nearly back-to-back dihadron and direct photon-hadron production in p+p collisions. This behavior is in contrast to Drell-Yan and semi-inclusive deep-inelastic scattering measurements.</p>},
  articleno    = {072002},
  author       = {Adare, A and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Akimoto, R. and Alexander, J J and Alfred, M. and Andrieux, V. and Aoki, K. and Apadula, N and Aramaki, Y and Asano, H. and Atomssa, E. T. and Awes, T. C. and Ayuso, Carmen and Azmoun, B. and Babintsev, V. and Bai, M and Bai, X. and Bandara, N. S. and Bannier, B and Barish, K N and Bathe, S and Baublis, V. and Baumann, C. and Baumgart, S. and Bazilevsky, A and Beaumier, M. and Beckman, S. and Belmont, R and Berdnikov, A and Berdnikov, Y. and Black, D and Blau, D. S. and Boer, M. and Bok, J S and Boyle, K and Brooks, M L and Bryslawskyj, J. and Buesching, H and Bumazhnov, V. and Butler, Christopher C. and Butsyk, S. and Campbell, S. and Canoa Roman, V. and Cervantes, R. and Chen, C. H. and Chi, C Y and Chiu, M and Choi, I J and Choi, J B and Choi, S and Christiansen, P. and Chujo, T. and Cianciolo, V and Citron, Z. and Cole, B A and Connors, M. and Cronin, N. and Crossette, N. and Csanád, M and Csörgo, T. and Danley, T. W. and Datta, A. and Daugherity, M. S. and David, G. and DeBlasio, K. and Dehmelt, K. and Denisov, A. and Deshpande, A and Desmond, E. J. and Ding, L. and Dion, A. and Dixit, D. and Do, J. H. and D'Orazio, L. and Drapier, O. and Drees, A. and Drees, K. A. and Dumancic, M. and Durham, J. M. and Durum, A. and Elder, T. and Engelmore, T and Enokizono, A. and En'yo, H. and Esumi, S. and Eyser, K. O. and Fadem, B and Fan, W. -T. and Feege, N. and Fields, D E and Finger, M and Finger, M and Fleuret, F. and Fokin, S. L. and Frantz, J E and Franz, A. and Frawley, A D and Fukao, Y. and Fukuda, Yuki and Fusayasu, T. and Gainey, K. and Gal, C and Gallus, P and Garg, P. and Garishvili, A. and Garishvili, I. and Ge, H. and Giordano, F and Glenn, A. and Gong, X. and Gonin, M. and Goto, Y. and Granier de Cassagnac, R and Grau, N. and Greene, S V and Grosse Perdekamp, M. and Gu, Y. and Gunji, T and Guragain, H. and Hachiya, T. and Haggerty, J. S. and Hahn, K I and Hamagaki, H and Hamilton, H. F. and Han, S. Y. and Hanks, J. and Hasegawa, S and Haseler, T. O. S. and Hashimoto, K. and Hayano, R. and He, X. and Hemmick, T. K. and Hester, T and Hill, J C and Hill, K and Hollis, R. S. and Homma, K and Hong, B. and Hoshino, T. and Hotvedt, N. and Huang, J. and Huang, S. and Ichihara, T. and Ikeda, Y and Imai, K. and Imazu, Y. and Imrek, J. and Inaba, M. and Iordanova, A. and Isenhower, D. and Isinhue, A. and Ito, Y and Ivanishchev, D. and Jacak, B. V. and Jeon, S. J. and Jezghani, M. and Ji, Zhenyu and Jia, J. and Jiang, X. and Johnson, B. M. and Joo, E. and Joo, K S and Jorjadze, V. and Jouan, D. and Jumper, D S and Kamin, J. and Kanda, S. and Kang, B. H. and Kang, J. H. and Kang, J. S. and Kapukchyan, D. and Kapustinsky, J and Karthas, S. and Kawall, D and Kazantsev, A. V. and Key, J. A. and Khachatryan, V. and Khandai, P. K. and Khanzadeev, A. and Kihara, K. and Kijima, K M and Kim, C. and Kim, D H and Kim, D. J. and Kim, E. -J. and Kim, H. -J. and Kim, M. H. and Kim, M. and Kim, Y. J. and Kim, Y. K. and Kincses, D. and Kistenev, E. and Klatsky, J. and Kleinjan, D. and Kline, P and Koblesky, T. and Kofarago, M and Komkov, B and Koster, J and Kotchetkov, D and Kotov, D and Krizek, F. and Kudo, S. and Kurita, K and Kurosawa, M and Kwon, Y. and Lacey, R and Lai, Y S and Lajoie, J G and Lallow, E. O. and Lebedev, A. and Lee, D. M, and Lee, G. H. and Lee, J. and Lee, K B and Lee, K S and Lee, S. and Lee, S. H. and Leitch, M J and Leitgab, M. and Leung, Y H and Lewis, B. and Lewis, N. A. and Li, X. and Li, X. and Lim, S. H. and Liu, L. D. and Liu, M. X. and Loggins, V. R. and Loggins, V. R. and Lovasz, K. and Lynch, D. and Maguire, C F and Majoros, T. and Makdisi, Y. I. and Makek, M. and Malaev, M. and Manion, A and Manko, V. I. and Mannel, E. and Masuda, H. and McCumber, M and McGaughey, P L and McGlinchey, D. and McKinney, C. and Meles, A. and Mendoza, M. and Meredith, B and Miake, Y and Mibe, T. and Mignerey, A C and Mihalik, D. E. and Miller, A. J. and Milov, A and Mishra, D. K. and Mitchell, J. T. and Mitsuka, G. and Miyasaka, S. and Mizuno, S. and Mohanty, A K and Mohapatra, S and Montuenga, P. and Moon, T. and Morrison, D. P. and Morrow, S. I.M. and Moskowitz, M. and Moukhanova, T. V. and Murakami, T and Murata, J. and Mwai, A. and Nagae, T. and Nagai, K. and Nagamiya, S. and Nagashima, K. and Nagashima, T. and Nagle, J L and Nagy, M I and Nakagawa, I and Nakagomi, H. and Nakamiya, Y and Nakamura, K. R. and Nakamura, T. and Nakano, K and Nattrass, C and Netrakanti, P. K. and Nihashi, M. and Niida, T and Nouicer, R. and Novák, T. and Novitzky, N. and Novotny, R and Nyanin, A. S. and O'Brien, E. and Ogilvie, C A and Oide, H. and Okada, K and Orjuela Koop, J. D. and Osborn, J. D. and Oskarsson, A. and Ottino, G. J. and Ozawa, K. and Pak, R. and Pantuev, V. and Papavassiliou, V. and Park, H I and Park, J. S. and Park, S. and Park, S. K. and Pate, S F and Patel, L. and Patel, M. and Peng, J. C. and Peng, W. X and Perepelitsa, D. V. and Perera, G. D. N. and Peressounko, D. Yu. and Perezlara, C. E. and Perry, J. and Petti, R. and Phipps, M. and Pinkenburg, C. and Pinson, R. and Pisani, R. P. and Pun, A. and Purschke, M. L. and Qu, H and Rak, J. and Ravinovich, I and Read, K F and Reynolds, D. and Riabov, V. and Riabov, Y and Richardson, E and Richford, D. and Rinn, T. and Riveli, N. and Roach, D and Rolnick, S D and Rosati, M and Rowan, Z. and Rubin, J. G. and Runchey, J. and Ryu, M S and Safonov, A. S. and Sahlmueller, B and Saito, N. and Sakaguchi, T. and Sako, H. and Samsonov, V. and Sarsour, M. and Sato, K. and Sato, S and Sawada, S. and Schaefer, B. and Schmoll, B. K. and Schmoll, B. K. and Sedgwick, K and Seele, J and Seidl, R and Sekiguchi, Y and Sen, A. and Seto, R and Sett, P. and Sexton, A. and Sharma, D. and Shaver, A. and Shein, I. and Shibata, T. A. and Shigaki, K. and Shimomura, M and Shioya, T. and Shoji, K and Shukla, P. and Sickles, A. and Silva, C L and Silvermyr, D. and Singh, B. K. and Singh, C P and Singh, V. and Skolnik, M. and Slunečka, M and Smith, K. L. and Snowball, M. and Solano, S. and Soltz, R A and Sondheim, W E and Sorensen, S. P. and Sourikova, I. V. and Stankus, P W and Steinberg, P and Stenlund, E. and Stepanov, M and Ster, A and Stoll, S. P. and Stone, M. R. and Sugitate, T and Sukhanov, A. and Sumita, T. and Sun, J. and Syed Khaja, A S and Sziklai, J and Takahara, A. and Takeda, A. and Taketani, A and Tanaka, Y. and Tanida, K. and Tannenbaum, M. J. and Tarafdar, S and Taranenko, A, and Tarnai, G. and Tennant, E. and Tieulent, R and Timilsina, A. and Todoroki, T and Tomášek, M and Torii, H. and Towell, C. L. and Towell, M. and Towell, R. and Towell, R S and Tserruya, I and Ueda, Y and Ujvari, B. and van Hecke, H W and Vargyas, M and Vazquez-Carson, S. and Vazquez-Zambrano, E and Veicht, A and Velkovska, J. and Vértesi, R and Virius, M and Vrba, V and Vukman, N. and Vznuzdaev, E. and Wang, X. R. and Wang, Z. and Watanabe, D. and Watanabe, K. and Watanabe, Y and Watanabe, Y. S. and Wei, F and Whitaker, S. and Wolin, S. and Wong, C. P. and Woody, C. L. and Wysocki, M and Xia, B. and Xu, C. and Xu, Q and Xue, L. and Yalcin, S. and Yamaguchi, Y. L. and Yamamoto, H and Yanovich, A. and Yin, Peiji and Yokkaichi, S and Yoo, J. H. and Yoon, I. and You, Z and Younus, I and Yu, H. and Yushmanov, I. E. and Zajc, W A and Zelenski, A and Zharko, S. and Zhou, S, and Zou, L. and , },
  issn         = {2470-0010},
  language     = {eng},
  month        = {04},
  number       = {7},
  publisher    = {American Physical Society},
  series       = {Physical Review D - Particles, Fields, Gravitation and Cosmology},
  title        = {Nonperturbative-transverse-momentum effects and evolution in dihadron and direct photon-hadron angular correlations in p+p collisions at s =510 GeV},
  url          = {http://dx.doi.org/10.1103/PhysRevD.95.072002},
  volume       = {95},
  year         = {2017},
}