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49 results on '"Sivers function"'

1. Measurements of the Z0/γ⁎ cross section and transverse single spin asymmetry in 510 GeV p + p collisions

Author: M.I. Abdulhamid, B.E. Aboona, J. Adam, L. Adamczyk, J.R. Adams, I. Aggarwal, M.M. Aggarwal, Z. Ahammed, E.C. Aschenauer, S. Aslam, J. Atchison, V. Bairathi, J.G. Ball Cap, K. Barish, R. Bellwied, P. Bhagat, A. Bhasin, S. Bhatta, S.R. Bhosale, J. Bielcik, J. Bielcikova, J.D. Brandenburg, C. Broodo, X.Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, J. Ceska, I. Chakaberia, P. Chaloupka, B.K. Chan, Z. Chang, A. Chatterjee, D. Chen, J. Chen, J.H. Chen, Z. Chen, J. Cheng, Y. Cheng, S. Choudhury, W. Christie, X. Chu, H.J. Crawford, M. Csanád, G. Dale-Gau, A. Das, I.M. Deppner, A. Dhamija, P. Dixit, X. Dong, J.L. Drachenberg, E. Duckworth, J.C. Dunlop, J. Engelage, G. Eppley, S. Esumi, O. Evdokimov, O. Eyser, R. Fatemi, S. Fazio, C.J. Feng, Y. Feng, E. Finch, Y. Fisyak, F.A. Flor, C. Fu, C.A. Gagliardi, T. Galatyuk, T. Gao, F. Geurts, N. Ghimire, A. Gibson, K. Gopal, X. Gou, D. Grosnick, A. Gupta, W. Guryn, A. Hamed, Y. Han, S. Harabasz, M.D. Harasty, J.W. Harris, H. Harrison-Smith, W. He, X.H. He, Y. He, N. Herrmann, L. Holub, C. Hu, Q. Hu, Y. Hu, H. Huang, H.Z. Huang, S.L. Huang, T. Huang, X. Huang, Y. Huang, T.J. Humanic, M. Isshiki, W.W. Jacobs, A. Jalotra, C. Jena, A. Jentsch, Y. Ji, J. Jia, C. Jin, X. Ju, E.G. Judd, S. Kabana, D. Kalinkin, K. Kang, D. Kapukchyan, K. Kauder, D. Keane, A. Khanal, Y.V. Khyzhniak, D.P. Kikoła, D. Kincses, I. Kisel, A. Kiselev, A.G. Knospe, H.S. Ko, L.K. Kosarzewski, L. Kumar, M.C. Labonte, R. Lacey, J.M. Landgraf, J. Lauret, A. Lebedev, J.H. Lee, Y.H. Leung, N. Lewis, C. Li, D. Li, H.-S. Li, H. Li, W. Li, X. Li, Y. Li, Z. Li, X. Liang, Y. Liang, R. Licenik, T. Lin, Y. Lin, M.A. Lisa, C. Liu, G. Liu, H. Liu, L. Liu, T. Liu, X. Liu, Y. Liu, Z. Liu, T. Ljubicic, O. Lomicky, R.S. Longacre, E.M. Loyd, T. Lu, J. Luo, X.F. Luo, L. Ma, R. Ma, Y.G. Ma, N. Magdy, D. Mallick, R. Manikandhan, S. Margetis, C. Markert, G. McNamara, O. Mezhanska, K. Mi, S. Mioduszewski, B. Mohanty, M.M. Mondal, I. Mooney, J. Mrazkova, M.I. Nagy, A.S. Nain, J.D. Nam, M. Nasim, D. Neff, J.M. Nelson, D.B. Nemes, M. Nie, G. Nigmatkulov, T. Niida, T. Nonaka, G. Odyniec, A. Ogawa, S. Oh, K. Okubo, B.S. Page, R. Pak, S. Pal, A. Pandav, A.K. Pandey, T. Pani, A. Paul, B. Pawlik, D. Pawlowska, C. Perkins, J. Pluta, B.R. Pokhrel, M. Posik, T. Protzman, V. Prozorova, N.K. Pruthi, M. Przybycien, J. Putschke, Z. Qin, H. Qiu, C. Racz, S.K. Radhakrishnan, A. Rana, R.L. Ray, R. Reed, C.W. Robertson, M. Robotkova, M.A. Rosales Aguilar, D. Roy, P. Roy Chowdhury, L. Ruan, A.K. Sahoo, N.R. Sahoo, H. Sako, S. Salur, S. Sato, B.C. Schaefer, W.B. Schmidke, N. Schmitz, F.-J. Seck, J. Seger, R. Seto, P. Seyboth, N. Shah, P.V. Shanmuganathan, T. Shao, M. Sharma, N. Sharma, R. Sharma, S.R. Sharma, A.I. Sheikh, D. Shen, D.Y. Shen, K. Shen, S.S. Shi, Y. Shi, Q.Y. Shou, F. Si, J. Singh, S. Singha, P. Sinha, M.J. Skoby, N. Smirnov, Y. Söhngen, Y. Song, B. Srivastava, T.D.S. Stanislaus, M. Stefaniak, D.J. Stewart, Y. Su, M. Sumbera, C. Sun, X. Sun, Y. Sun, B. Surrow, M. Svoboda, Z.W. Sweger, A.C. Tamis, A.H. Tang, Z. Tang, T. Tarnowsky, J.H. Thomas, A.R. Timmins, D. Tlusty, T. Todoroki, S. Trentalange, P. Tribedy, S.K. Tripathy, T. Truhlar, B.A. Trzeciak, O.D. Tsai, C.Y. Tsang, Z. Tu, J. Tyler, T. Ullrich, D.G. Underwood, I. Upsal, G. Van Buren, J. Vanek, I. Vassiliev, V. Verkest, F. Videbæk, S.A. Voloshin, F. Wang, G. Wang, J.S. Wang, J. Wang, K. Wang, X. Wang, Y. Wang, Z. Wang, J.C. Webb, P.C. Weidenkaff, G.D. Westfall, D. Wielanek, H. Wieman, G. Wilks, S.W. Wissink, R. Witt, J. Wu, X. Wu, B. Xi, Z.G. Xiao, G. Xie, W. Xie, H. Xu, N. Xu, Q.H. Xu, Y. Xu, Z. Xu, G. Yan, Z. Yan, C. Yang, Q. Yang, S. Yang, Y. Yang, Z. Ye, L. Yi, K. Yip, Y. Yu, H. Zbroszczyk, W. Zha, C. Zhang, D. Zhang, J. Zhang, S. Zhang, W. Zhang, X. Zhang, Y. Zhang, Z.J. Zhang, Z. Zhang, F. Zhao, J. Zhao, M. Zhao, J. Zhou, S. Zhou, Y. Zhou, X. Zhu, M. Zurek, and M. Zyzak
Subjects: Z0, Cross section, Transverse momentum dependent parton distribution functions (TMDs), Transverse single spin asymmetry (TSSA, AN), Sivers function, Physics, QC1-999
Abstract: The differential cross section for Z0 production, measured as a function of the boson's transverse momentum (pT), provides important constraints on the evolution of the transverse momentum dependent parton distribution functions (TMDs). The transverse single spin asymmetry (TSSA) of the Z0 is sensitive to one of the polarized TMDs, the Sivers function, which is predicted to have the opposite sign in p+p →W/Z+X from that which enters in semi-inclusive deep inelastic scattering. In this Letter, the STAR Collaboration reports the first measurement of the Z0/γ⁎ differential cross section as a function of its pT in p+p collisions at a center-of-mass energy of 510 GeV, together with the Z0/γ⁎ total cross section. We also report the measurement of Z0/γ⁎ TSSA in transversely polarized p+p collisions at 510 GeV.
Published: 2024
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2. Measurements of the Z0/γ⁎ cross section and transverse single spin asymmetry in 510 GeV p + p collisions.

Subjects: *DIFFERENTIAL cross sections, *DEEP inelastic collisions, *PARTONS, *DISTRIBUTION (Probability theory)
Abstract: The differential cross section for Z 0 production, measured as a function of the boson's transverse momentum (p T), provides important constraints on the evolution of the transverse momentum dependent parton distribution functions (TMDs). The transverse single spin asymmetry (TSSA) of the Z 0 is sensitive to one of the polarized TMDs, the Sivers function, which is predicted to have the opposite sign in p + p → W / Z + X from that which enters in semi-inclusive deep inelastic scattering. In this Letter, the STAR Collaboration reports the first measurement of the Z 0 / γ ⁎ differential cross section as a function of its p T in p + p collisions at a center-of-mass energy of 510 GeV, together with the Z 0 / γ ⁎ total cross section. We also report the measurement of Z 0 / γ ⁎ TSSA in transversely polarized p + p collisions at 510 GeV. [ABSTRACT FROM AUTHOR]
Published: 2024
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3. Reweighting the Sivers function with jet data from STAR

Author: M. Boglione, U. D'Alesio, C. Flore, J.O. Gonzalez-Hernandez, F. Murgia, and A. Prokudin
Subjects: Sivers function, SIDIS, Single spin asymmetry, Reweighting, Physics, QC1-999
Abstract: The reweighting procedure that using Bayesian statistics incorporates the information contained in a new data set, without the need of re-fitting, is applied to the quark Sivers function extracted from Semi-Inclusive Deep Inelastic Scattering (SIDIS) data. We exploit the recently published single spin asymmetry data for the inclusive jet production in polarized pp collisions from the STAR Collaboration at RHIC, which cover a much wider x region compared to SIDIS measurements. The reweighting method is extended to the case of asymmetric errors and the results show a remarkable improvement of the knowledge of the quark Sivers function.
Published: 2021
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4. ECCE sensitivity studies for single hadron transverse single spin asymmetry measurements

Author: R. Seidl, A. Vladimirov, D. Pitonyak, A. Prokudin, J.K. Adkins, Y. Akiba, A. Albataineh, M. Amaryan, I.C. Arsene, C. Ayerbe Gayoso, J. Bae, X. Bai, M.D. Baker, M. Bashkanov, R. Bellwied, F. Benmokhtar, V. Berdnikov, J.C. Bernauer, F. Bock, W. Boeglin, M. Borysova, E. Brash, P. Brindza, W.J. Briscoe, M. Brooks, S. Bueltmann, M.H.S. Bukhari, A. Bylinkin, R. Capobianco, W.-C. Chang, Y. Cheon, K. Chen, K.-F. Chen, K.-Y. Cheng, M. Chiu, T. Chujo, Z. Citron, E. Cline, E. Cohen, T. Cormier, Y. Corrales Morales, C. Cotton, J. Crafts, C. Crawford, S. Creekmore, C. Cuevas, J. Cunningham, G. David, C.T. Dean, M. Demarteau, S. Diehl, N. Doshita, R. Dupré, J.M. Durham, R. Dzhygadlo, R. Ehlers, L. El Fassi, A. Emmert, R. Ent, C. Fanelli, R. Fatemi, S. Fegan, M. Finger, J. Frantz, M. Friedman, I. Friscic, D. Gangadharan, S. Gardner, K. Gates, F. Geurts, R. Gilman, D. Glazier, E. Glimos, Y. Goto, N. Grau, S.V. Greene, A.Q. Guo, L. Guo, S.K. Ha, J. Haggerty, T. Hayward, X. He, O. Hen, D.W. Higinbotham, M. Hoballah, T. Horn, A. Hoghmrtsyan, P.-h.J. Hsu, J. Huang, G. Huber, A. Hutson, K.Y. Hwang, C.E. Hyde, M. Inaba, T. Iwata, H.S. Jo, K. Joo, N. Kalantarians, G. Kalicy, K. Kawade, S.J.D. Kay, A. Kim, B. Kim, C. Kim, M. Kim, Y. Kim, E. Kistenev, V. Klimenko, S.H. Ko, I. Korover, W. Korsch, G. Krintiras, S. Kuhn, C.-M. Kuo, T. Kutz, J. Lajoie, D. Lawrence, S. Lebedev, H. Lee, J.S.H. Lee, S.W. Lee, Y.-J. Lee, W. Li, W.B. Li, X. Li, Y.T. Liang, S. Lim, C.-H. Lin, D.X. Lin, K. Liu, M.X. Liu, K. Livingston, N. Liyanage, W.J. Llope, C. Loizides, E. Long, R.-S. Lu, Z. Lu, W. Lynch, S. Mantry, D. Marchand, M. Marcisovsky, C. Markert, P. Markowitz, H. Marukyan, P. McGaughey, M. Mihovilovic, R.G. Milner, A. Milov, Y. Miyachi, A. Mkrtchyan, P. Monaghan, R. Montgomery, D. Morrison, A. Movsisyan, H. Mkrtchyan, C. Munoz Camacho, M. Murray, K. Nagai, J. Nagle, I. Nakagawa, C. Nattrass, D. Nguyen, S. Niccolai, R. Nouicer, G. Nukazuka, M. Nycz, V.A. Okorokov, S. Orešić, J.D. Osborn, C. O’Shaughnessy, S. Paganis, Z. Papandreou, S.F. Pate, M. Patel, C. Paus, G. Penman, M.G. Perdekamp, D.V. Perepelitsa, H. Periera da Costa, K. Peters, W. Phelps, E. Piasetzky, C. Pinkenburg, I. Prochazka, T. Protzman, M.L. Purschke, J. Putschke, J.R. Pybus, R. Rajput-Ghoshal, J. Rasson, B. Raue, K.F. Read, K. Røed, R. Reed, J. Reinhold, E.L. Renner, J. Richards, C. Riedl, T. Rinn, J. Roche, G.M. Roland, G. Ron, M. Rosati, C. Royon, J. Ryu, S. Salur, N. Santiesteban, R. Santos, M. Sarsour, J. Schambach, A. Schmidt, N. Schmidt, C. Schwarz, J. Schwiening, A. Sickles, P. Simmerling, S. Sirca, D. Sharma, Z. Shi, T.-A. Shibata, C.-W. Shih, S. Shimizu, U. Shrestha, K. Slifer, K. Smith, D. Sokhan, R. Soltz, W. Sondheim, J. Song, I.I. Strakovsky, P. Steinberg, P. Stepanov, J. Stevens, J. Strube, P. Sun, X. Sun, K. Suresh, V. Tadevosyan, W.-C. Tang, S. Tapia Araya, S. Tarafdar, L. Teodorescu, D. Thomas, A. Timmins, L. Tomasek, N. Trotta, R. Trotta, T.S. Tveter, E. Umaka, A. Usman, H.W. van Hecke, C. Van Hulse, J. Velkovska, E. Voutier, P.K. Wang, Q. Wang, Y. Wang, D.P. Watts, N. Wickramaarachchi, L. Weinstein, M. Williams, C.-P. Wong, L. Wood, M.H. Wood, C. Woody, B. Wyslouch, Z. Xiao, Y. Yamazaki, Y. Yang, Z. Ye, H.D. Yoo, M. Yurov, N. Zachariou, W.A. Zajc, W. Zha, J.-L. Zhang, J.-X. Zhang, Y. Zhang, Y.-X. Zhao, X. Zheng, P. Zhuang, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
Subjects: transverse spin dependent distribution and fragmentation functions, Nuclear and High Energy Physics, FOS: Physical sciences, lepton: scattering, transverse momentum dependence, hadron: transverse momentum, fragmentation function, x-dependence, High Energy Physics - Experiment, Sivers function, semi-inclusive DIS, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], parton, Collins, Instrumentation, transversity, spin: transverse, flavor, deep inelastic scattering: semi-inclusive reaction, positron p: deep inelastic scattering, nucleon: spin: transverse, sensitivity, Transverse spin dependent distribution and fragmentation functions, error: statistical, kinematics, ECCE detector feasibility studies, charge: tensor, numerical calculations: Monte Carlo, Semi-inclusive DIS, spin: asymmetry
Abstract: We performed feasibility studies for various single transverse spin measurements that are related to the Sivers effect, transversity and the tensor charge, and the Collins fragmentation function. The processes studied include semi-inclusive deep inelastic scattering (SIDIS) where single hadrons (pions and kaons) were detected in addition to the scattered DIS lepton. The data were obtained in {\sc pythia}6 and {\sc geant}4 simulated e+p collisions at 18 GeV on 275 GeV, 18 on 100, 10 on 100, and 5 on 41 that use the ECCE detector configuration. Typical DIS kinematics were selected, most notably $Q^2 > 1 $ GeV$^2$, and cover the $x$ range from $10^{-4}$ to $1$. The single spin asymmetries were extracted as a function of $x$ and $Q^2$, as well as the semi-inclusive variables $z$, and $P_T$. They are obtained in azimuthal moments in combinations of the azimuthal angles of the hadron transverse momentum and transverse spin of the nucleon relative to the lepton scattering plane. The initially unpolarized MonteCarlo was re-weighted in the true kinematic variables, hadron types and parton flavors based on global fits of fixed target SIDIS experiments and $e^+e^-$ annihilation data. The expected statistical precision of such measurements is extrapolated to 10 fb$^{-1}$ and potential systematic uncertainties are approximated given the deviations between true and reconstructed yields. The impact on the knowledge of the Sivers functions, transversity and tensor charges, and the Collins function has then been evaluated in the same phenomenological extractions as in the Yellow Report. The impact is found to be comparable to that obtained with the parameterized Yellow Report detector and shows that the ECCE detector configuration can fulfill the physics goals on these quantities., 22 pages, 22 figures, to be submitted to joint ECCE proposal NIM-A volume
Published: 2023

5. Latest Hermes results on azimuthal single- and double-spin asymmetries in semi-inclusive deep-inelastic scattering by transversely polarized protons

Author: Pappalardo, Luciano Libero, Schnell, Gunar, and HERMES Collaboration
Subjects: electron p: deep inelastic scattering, transverse [polarization], leptoproduction [anti-p], anti-p: leptoproduction, HERMES, leptoproduction [K], Sivers function, phase space, p: polarized target, semi-inclusive reaction [deep inelastic scattering], leptoproduction [p], polarization: transverse, ddc:530, leptoproduction [pi], Collins, hydrogen: target, pi: leptoproduction, deep inelastic scattering: semi-inclusive reaction, p: leptoproduction, modulation, DESY HERA Stor, deep inelastic scattering [electron p], target [hydrogen], polarized target [p], K: leptoproduction, higher-dimensional, asymmetry [spin], spin: asymmetry, experimental results
Abstract: 41st International Conference on High Energy physics, ICHEP2022, Bologna, Italy, 6 Jul 2022 - 13 Jul 2022; Proceedings of Science / International School for Advanced Studies (ICHEP2022), 783 (2022). doi:10.22323/1.414.0783, Azimuthal single- and double-spin asymmetries measured at HERMES in semi-inclusive leptoproduction of pions, charged kaons, protons, and antiprotons from a transversely polarized hydrogen target are presented. The results of a re-analysis of the previously published Collins and Sivers asymmetries, extended to include protons and antiprotons as well as an extraction in a multi-dimensional binning and enlarged phase space, is reported along with the corresponding results for the remaining single- and double-spin asymmetries associated to the semi-inclusive deep-inelastic scattering process with a transversely polarized target. Among those results, significant non-vanishing ${\rm cos}(\phi − \phi_s)$ modulations provide evidence for a sizable worm-gear distribution $𝑔_{1𝑇}$ . Most of the other modulations are found to be consistent with zero with the notable exception of large ${\rm sin}(𝜙_s)$ modulations for charged pions and positively charged kaons., Published by SISSA, Trieste
Published: 2023

6. Reweighting the quark Sivers function with STAR jet data

Author: Carlo Flore, Mariaelena Boglione, Umberto D'Alesio, Josè Osvaldo Gonzalez-Hernandez, Francesco Murgia, Alexey Prokudin, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Subjects: p p: scattering, Nuclear Theory, deep inelastic scattering: semi-inclusive reaction, STAR, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], FOS: Physical sciences, polarized beam, transverse momentum dependence, Bayesian, asymmetry: error, High Energy Physics - Experiment, Nuclear Theory (nucl-th), Sivers function, quark, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), jet: production, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], spin: asymmetry, talk, Brookhaven RHIC Coll
Abstract: The Bayesian reweighting procedure is applied for the first time to a TMD distribution, the quark Sivers function extracted from SIDIS data. By exploiting the recent published single spin asymmetry data for the inclusive jet production in $p^\uparrow p$ collisions from the STAR collaboration at RHIC, we show how such a procedure allows to incorporate the information contained in the new data set, without the need of re-fitting, and to explore a much wider $x$ region compared to SIDIS measurements. The reweighting method is also extended to the case of asymmetric errors, and the results show a significant improvement on the knowledge of the quark Sivers function., 8 pages, 3 figures. Contribution to the XXVIII International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2021). Submission to SciPost Proceedings
Published: 2022

7. Prospects for quarkonium studies at the high-luminosity LHC

Author: Melih Arslan Ozcelik, Carlo Flore, Oleg Teryaev, Shohini Bhattacharya, L. Massacrier, Tomas Kasemets, Chris A. Flett, David D'Enterria, Cyrille Marquet, Riccardo Nagar, V. Kartvelishvili, Maxim Nefedov, Miguel G. Echevarria, R. McNulty, Charlotte Van Hulse, Luca Micheletti, Nodoka Yamanaka, Francesco Giovanni Celiberto, Pol Bernard Gossiaux, Hua-Sheng Shao, Thomas Mehen, M. Winn, Bertrand Ducloué, Amy Selvi Tee, Maria Vittoria Garzelli, Cvetan Valeriev Cheshkov, Yiannis Makris, Pieter Taels, Xiaojun Yao, Denys Yen Arrebato Villar, Matteo Rinaldi, Liupan An, Jibo He, Jonathan R. Gaunt, Cédric Mezrag, Darren Price, Florent Scarpa, Emilien Chapon, Kazuhiro Watanabe, Umberto D'Alesio, Jian-Wei Qiu, Yanxi Zhang, Ivan Vitev, Cesar Luiz Da Silva, Sangem Rajesh, Jean-Philippe Lansberg, Jaroslav Adam, Cristian Pisano, Biswarup Paul, E. G. Ferreiro, Maddie Smith, Laboratoire de physique subatomique et des technologies associées (SUBATECH), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), ANR-20-CE31-0015,PrecisOnium,Promouvoir la précision des études de la production de quarkonia(2020), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: J/psi(3100), heavy ion: scattering, generalized parton distribution, Nuclear Theory, Proton, nucleus nucleus, parton: distribution function, Parton, eta/c(3590), nucl-ex, transverse momentum dependence, Large Hadron Collider (LHC), 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, law.invention, Sivers function, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), law, High Luminosity, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], parton, Nuclear Experiment (nucl-ex), Quarkonium production, Nuclear Experiment, quark gluon: plasma, Physics, Large Hadron Collider, Luminosity (scattering theory), hep-ph, high, nucleus nucleus: scattering, Quarkonium, heavy ion, High Energy Physics - Phenomenology, CERN LHC Coll, Nuclear Physics - Theory, luminosity: high, eta/c(2980), Particle Physics - Experiment, quarkonium, Nuclear and High Energy Physics, Particle physics, p p: scattering, small-x, CERN Lab, nucl-th, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], collective, FOS: Physical sciences, transverse momentum, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory (nucl-th), 0103 physical sciences, Nuclear Physics - Experiment, luminosity, 010306 general physics, Collider, p nucleus: scattering, quark gluon, plasma, Particle Physics - Phenomenology, 010308 nuclear & particles physics, hep-ex, High Energy Physics::Phenomenology, scattering, nucleus, gluon, Gluon, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Quark–gluon plasma, High Energy Physics::Experiment, p nucleus, production
Abstract: Prospects for quarkonium-production studies accessible during the upcoming high-luminosity phases of the CERN Large Hadron Collider operation after 2021 are reviewed. Current experimental and theoretical open issues in the field are assessed together with the potential for future studies in quarkonium-related physics. This will be possible through the exploitation of the huge data samples to be collected in proton-proton, proton-nucleus and nucleus-nucleus collisions, both in the collider and fixed-target modes. Such investigations include, among others, those of: (i) J/psi and Upsilon produced in association with other hard particles; (ii) chi(c,b) and eta(c,b) down to small transverse momenta; (iii) the constraints brought in by quarkonia on gluon PDFs, nuclear PDFs, TMDs, GPDs and GTMDs, as well as on the low-x parton dynamics; (iv) the gluon Sivers effect in polarised-nucleon collisions; (v) the properties of the quark-gluon plasma produced in ultra-relativistic heavy-ion collisions and of collective partonic effects in general; and (vi) double and triple parton scatterings., Comment: Latex, 115 pages, 55 figures, 4 tables. v2: Review published in Progress in Particle and Nuclear Physics
Published: 2022

8. Potential linear and angular momentum in the scalar diquark model

Author: Matthias Burkardt, Cédric Lorcé, William Focillon, David Arturo Amor-Quiroz, Centre de Physique Théorique [Palaiseau] (CPHT), and Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)
Subjects: Quark, Angular momentum, Particle physics, Physics and Astronomy (miscellaneous), media_common.quotation_subject, Scalar (mathematics), Nuclear Theory, FOS: Physical sciences, potential: linear, QC770-798, initial-state interaction, Astrophysics, 01 natural sciences, Asymmetry, Nucleon structure, Sivers function, High Energy Physics - Phenomenology (hep-ph), Nuclear and particle physics. Atomic energy. Radioactivity, 0103 physical sciences, 010306 general physics, Engineering (miscellaneous), media_common, Physics, 010308 nuclear & particles physics, Scalar diquark model, High Energy Physics::Phenomenology, Parity (physics), State (functional analysis), final-state interaction, Diquark, QB460-466, High Energy Physics - Phenomenology, parity, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Homogeneous space, time reversal: symmetry, quark: transverse momentum, diquark: scalar, asymmetry
Abstract: We present an analytic two-loop calculation within the scalar diquark model of the potential linear and angular momenta, defined as the difference between the Jaffe-Manohar and Ji notions of linear and angular momenta. As expected by parity and time-reversal symmetries, a direct calculation confirms that the potential transverse momentum coincides with the Jaffe-Manohar (or canonical) definition of average quark transverse momentum, also known as the quark Sivers shift. We examine whether initial/final-state interactions at the origin of the Sivers asymmetry can also generate a potential angular momentum in the scalar diquark model., Comment: 20 pages, 6 figures
Published: 2021

9. Small-x Physics Meets Spin-Orbit Coupling: Transverse Spin Effects in High Energy QCD

Author: Santiago, M. Gabriel
Subjects: Quantum Physics, Nuclear Physics, Physics, transverse spin, small-x, Sivers function, Boer-Mulders function, QCD, single spin asymmetry, transverse spin asymmetry, single transverse spin asymmetry, STSA, odderon, sub-eikonal, lensing mechanism, TMDs
Abstract: In this thesis we study the dynamics of quark and gluon distributions inside a proton, allowing forthe proton and its constituent quarks to be polarized transversely with respect to the momentumof the proton (or the beam axis in a scattering experiment). We call such a polarization transversespin, and the interactions between the orbital motion of quarks within a proton and this transversespin of both the proton and the quarks themselves lead to a variety of fascinating effects in nuclearphysics, including the existence of time-reversal odd observables and the violation of traditionalwisdom that transverse spin-dependent effects should diminish rapidly at high energy. We considerthe dynamics of transverse spin in the context of high energy collisions, which probe the quarksand gluons carrying the smallest fraction x (called Bjorken x) of the proton’s momentum. As thecollision energy is increased and consequently lower values of x are probed, the population of quarksand gluons grows and turns the proton into an extremely dense cloud of gluons. Tightly packingthe proton or a nucleus as in this dense regime yields effects like nuclear shadowing and saturationas non-linear gluon recombination effects slow the growth of the gluon distributions toward verysmall values of x. In this work we study some features of transverse spin dynamics at small valuesof x, beginning with an investigation of the transverse spin asymmetry in collisions of transverselypolarized protons off unpolarized proton or nucleus targets AN. Here we use a model calculation tosee how a final state interaction between the constituents of the polarized proton (after scatteringoff the unpolarized target) can give a qualitative explanation of several puzzling features of thisasymmetry. Next, we study the small-x asymptotics of the time reversal (T)-odd, leading-twistquark TMDs, the quark Sivers function f1T⊥ and the Boer-Mulders function h1⊥ . In order to derivethese asymptotics, we first construct the full S-matrix for a quark scattering off the backgroundquark and gluon fields of a target proton to sub-sub-eikonal order (suppressed by two inverse powers of center of mass energy for the scattering). We call this object the Polarized Wilson line, and it accounts for interactions between a quark with arbitrary polarization scattering off a target protonof arbitrary polarization, allowing us to construct small-x asymptotics for all the leading-twistquark TMDs. Employing this Polarized Wilson line, we derive closed small-x evolution equationsfor both the quark Sivers function and the Boer-Mulders function in the large-Nc limit, where wetake the number of quark colors to be large. For the Sivers function we obtain two contributions,an eikonal (not suppressed by energy) contribution coming from the spin-dependent odderon anda novel sub-eikonal contribution. Combining the known small-x evolution for the odderon with thenumerical solutions for the sub-eikonal contribution, we find the small-x asymptotics for the quarkSivers function as the spin-dependent odderon contribution and the new sub-eikonal correction. For the Boer-Mulders we obtain the new sub-sub-eikonal contribution.
Published: 2022

10. Transverse single-spin asymmetries of midrapidity $\pi^0$ and $\eta$ mesons in polarized $p+p$ collisions at $\sqrt{s}=200$ GeV

Author: Acharya, U. A., Aidala, C., Akiba, Y., Alfred, M., Andrieux, V., Apadula, N., Asano, H., Azmoun, B., Babintsev, V., Bandara, N. S., Barish, K. N., Bathe, S., Bazilevsky, A., Beaumier, M., Belmont, R., Berdnikov, A., Berdnikov, Y., Bichon, L., Blankenship, B., Blau, D. S., Bok, J. S., Borisov, V., Brooks, M. L., Bryslawskyj, J., Bumazhnov, V., Campbell, S., Roman, V. Canoa, Cervantes, R., Chi, C. Y., Chiu, M., Choi, I. J., Choi, J. B., Citron, Z., Connors, M., Corliss, R., Cronin, N., Csanád, M., Csörgő, T., Danley, T. W., Daugherity, M. S., David, G., DeBlasio, K., Dehmelt, K., Denisov, A., Deshpande, A., Desmond, E. J., Dion, A., Dixit, D., Do, J. H., Drees, A., Drees, K. A., Durham, J. M., Durum, A., Enokizono, A., En'yo, H., Esha, R., Esumi, S., Fadem, B., Fan, W., Feege, N., Fields, D. E., Finger, M., Finger, Jr., M., Firak, D., Fitzgerald, D., Fokin, S. L., Frantz, J. E., Franz, A., Frawley, A. D., Fukuda, Y., Gal, C., Gallus, P., Garg, P., Ge, H., Giles, M., Giordano, F., Goto, Y., Grau, N., Greene, S. V., Perdekamp, M. Grosse, Gunji, T., Guragain, H., Hachiya, T., Haggerty, J. S., Hahn, K. I., Hamagaki, H., Hamilton, H. F., Han, S. Y., Hanks, J., Hasegawa, S., Haseler, T. O. S., He, X., Hemmick, T. K., Hill, J. C., Hill, K., Hodges, A., Hollis, R. S., Homma, K., Hong, B., Hoshino, T., Hotvedt, N., Huang, J., Huang, S., Imai, K., Inaba, M., Iordanova, A., Isenhower, D., Ivanishchev, D., Jacak, B. V., Jezghani, M., Ji, Z., Jiang, X., Johnson, B. M., Jouan, D., Jumper, D. S., Kang, J. H., Kapukchyan, D., Karthas, S., Kawall, D., Kazantsev, A. V., Khachatryan, V., Khanzadeev, A., Khatiwada, A., Kim, C., Kim, E. -J., Kim, M., Kincses, D., Kingan, A., Kistenev, E., Klatsky, J., Kline, P., Koblesky, T., Kotov, D., Kudo, S., Kurgyis, B., Kurita, K., Kwon, Y., Lajoie, J. G., Larionova, D., Larionova, M., Lebedev, A., Lee, S., Lee, S. H., Leitch, M. J., Leung, Y. H., Lewis, N. A., Li, X., Lim, S. H., Liu, M. X., Loggins, V. -R., Lökös, S., Lovasz, K., Lynch, D., Majoros, T., Makdisi, Y. I., Makek, M., Manko, V. I., Mannel, E., McCumber, M., McGaughey, P. L., McGlinchey, D., McKinney, C., Mendoza, M., Metzger, W. J., Mignerey, A. C., Milov, A., Mishra, D. K., Mitchell, J. T., Mitrankov, Iu., Mitsuka, G., Miyasaka, S., Mizuno, S., Mondal, M. M., Montuenga, P., Moon, T., Morrison, D. P., Morrow, S. I., Mulilo, B., Murakami, T., Murata, J., Nagai, K., Nagashima, K., Nagashima, T., Nagle, J. L., Nagy, M. I., Nakagawa, I., Nakano, K., Nattrass, C., Nelson, S., Niida, T., Nouicer, R., Novák, T., Novitzky, N., Nyanin, A. S., O'Brien, E., Ogilvie, C. A., Koop, J. D. Orjuela, Osborn, J. D., Oskarsson, A., Ottino, G. J., Ozawa, K., Pantuev, V., Papavassiliou, V., Park, J. S., Park, S., Pate, S. F., Patel, M., Peng, W., Perepelitsa, D. V., Perera, G. D. N., Peressounko, D. Yu., PerezLara, C. E., Perry, J., Petti, R., Phipps, M., Pinkenburg, C., Pisani, R. P., Potekhin, M., Pun, A., Purschke, M. L., Radzevich, P. V., Ramasubramanian, N., Read, K. F., Reynolds, D., Riabov, V., Riabov, Y., Richford, D., Rinn, T., Rolnick, S. D., Rosati, M., Rowan, Z., Runchey, J., Safonov, A. S., Sakaguchi, T., Sako, H., Samsonov, V., Sarsour, M., Sato, S., Schaefer, B., Schmoll, B. K., Sedgwick, K., Seidl, R., Sen, A., Seto, R., Sexton, A., Sharma, D, Sharma, D., Shein, I., Shibata, T. -A., Shigaki, K., Shimomura, M., Shioya, T., Shukla, P., Sickles, A., Silva, C. L., Silvermyr, D., Singh, B. K., Singh, C. P., Singh, V., Slunečka, M., Smith, K. L., Snowball, M., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Stankus, P. W., Stoll, S. P., Sugitate, T., Sukhanov, A., Sumita, T., Sun, J., Sun, X., Sun, Z., Sziklai, J., Tanida, K., Tannenbaum, M. J., Tarafdar, S., Tarnai, G., Tieulent, R., Timilsina, A., Todoroki, T., Tomášek, M., Towell, C. L., Towell, R. S., Tserruya, I., Ueda, Y., Ujvari, B., van Hecke, H. W., Velkovska, J., Virius, M., Vrba, V., Vukman, N., Wang, X. R., Watanabe, Y. S., Wong, C. P., Woody, C. L., Wu, Y., Xu, C., Xu, Q., Xue, L., Yalcin, S., Yamaguchi, Y. L., Yamamoto, H., Yanovich, A., Yoo, J. H., Yoon, I., Yu, H., Yushmanov, I. E., Zajc, W. A., Zelenski, A., Zhai, Y., Zharko, S., Zou, L., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and PHENIX
Subjects: p p: scattering, heavy ion: scattering, p: polarized beam, Nuclear Theory, collinear, pi0, eta, High Energy Physics - Experiment, Sivers function, isospin, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], polarization: transverse, Particle Physics Experiments, parton, correlation function, Nuclear Experiment, Brookhaven RHIC Coll, effect: strangeness, flavor, effect: nonperturbative, High Energy Physics::Phenomenology, gluon, PHENIX, rapidity, kinematics, High Energy Physics::Experiment, spin: asymmetry, p p: colliding beams, experimental results
Abstract: We present a measurement of the transverse single-spin asymmetry for $\pi^0$ and $\eta$ mesons in $p^\uparrow$$+$$p$ collisions in the pseudorapidity range $|\eta, Comment: 314 authors from 66 institutions, 10 pages, 5 figures, 2 tables, 2015 data. v2 is version accepted for publication in Phys. Rev. D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
Published: 2021

11. On the physics potential to study the gluon content of proton and deuteron at NICA SPD

Author: Maxim Nefedov, Vladimir Saleev, Marco Radici, A. Guskov, Jean-Philippe Lansberg, Alessandro Bacchetta, Miguel G. Echevarria, A. Rymbekova, K. F. Liu, Andrej Arbuzov, Oleg Teryaev, A. Karpishkov, Bernd A. Kniehl, Umberto D'Alesio, B. Parsamyan, Francesco Murgia, S. Kumano, M. Deka, N.Ya. Ivanov, A.V. Efremov, Francesco Giovanni Celiberto, Cristian Pisano, M. Butenschoen, A. Shipilova, Ya. Klopot, Qin-Tao Song, I. Denisenko, Aram Kotzinian, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Subjects: Proton, Nuclear Theory, gluon: helicity, 01 natural sciences, High Energy Physics - Experiment, law.invention, Sivers function, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), law, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, transversity, Quantum chromodynamics, Physics, photon: production, Luminosity (scattering theory), Proton and deuteron spin structure, Helicity, 3. Good health, photon: direct production, High Energy Physics - Phenomenology, proposed experiment, Nucleon, spin: asymmetry, charmonium: production, Nuclear and High Energy Physics, Particle physics, p: polarized beam, polarization: longitudinal, FOS: Physical sciences, NICA, 0103 physical sciences, polarization: transverse, 010306 general physics, Spin (physics), Collider, deuteron: polarized beam, Dubna Lab, Polarized hadron collisions, 010308 nuclear & particles physics, nucleus, Spin asymmetries, nucleon: structure function, QCD, Gluon, TMD factorization, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Gluon TMD PDFs, Physics::Accelerator Physics, High Energy Physics::Experiment, charm, experimental results
Abstract: The Spin Physics Detector (SPD) is a future multipurpose experiment foreseen to run at the NICA collider, which is currently under construction at the Joint Institute for Nuclear Research (JINR, Dubna, Russia). The physics program of the experiment is based on collisions of longitudinally and transversely polarized protons and deuterons at $\sqrt{s}$ up to 27 GeV and luminosity up to 10$^{32}$ cm$^{-2}$ s$^{-1}$. The SPD will operate as a universal facility for comprehensive study of unpolarized and polarized gluon content of the nucleon, using different complementary probes such as: charmonia, open charm, and prompt photon production processes. The aim of this work is to make a thorough review of the physics objectives that can potentially be addressed at the SPD, underlining related theoretical aspects and discussing relevant experimental results when available. Among different pertinent phenomena particular attention is drawn to the study of the gluon helicity, gluon Sivers and Boer-Mulders functions in the nucleon, as well as the gluon transversity distribution in the deuteron, via the measurement of specific single and double spin asymmetries., Comment: arXiv admin note: text overlap with arXiv:2102.00442
Published: 2021

12. Azimuthal single- and double-spin asymmetries in semi-inclusive deep-inelastic lepton scattering by transversely polarized protons

Author: P. E. Reimer, Vitaly Shutov, Wolfgang Lorenzon, G. Schnell, P. Lenisa, Ralf Kaiser, B. Seitz, V. Muccifora, P. Di Nezza, G. Nazaryan, T. A. Shibata, R.O. Avakian, P. Kravchenko, Dirk Ryckbosch, A. Rostomyan, Alessandro Bacchetta, B. Zihlmann, L. L. Pappalardo, L. Felawka, N. Akopov, G. Gavrilov, C. Riedl, W. Augustyniak, L. Lagamba, S. Yaschenko, G. Karyan, G. P. Capitani, Frank Ellinghaus, G. Ciullo, E. R. Kinney, Wouter Deconinck, H. E. Jackson, E. De Sanctis, B. Marianski, Y. Naryshkin, M. Contalbrigo, A. Airapetian, V. Gharibyan, Z. Akopov, G. Elbakian, P. Zupranski, Adel Terkulov, A. Ivanilov, R. De Leo, E. C. Aschenauer, A. Nass, S. I. Manaenkov, H. Marukyan, G. Rosner, S. Belostotski, A. Fantoni, A. Movsisyan, V. A. Kozlov, S. Joosten, D. Veretennikov, M. Diefenthaler, M. Statera, D. Zeiler, Y. Van Haarlem, A. Kisselev, Y. Holler, J. G. Rubin, Michael Tytgat, I. Lehmann, A. R. Reolon, V. Bryzgalov, E. Cisbani, C. B. Van Hulse, Y. Miyachi, D. Hasch, I. Vilardi, Michael Düren, W.-D. Nowak, L. Lapikás, Andreas Schäfer, and Klaus Rith
Subjects: dimension: 3, Nuclear Theory, HERMES, Parton, SIDIS, 01 natural sciences, PARTON, High Energy Physics - Experiment, Sivers function, High Energy Physics - Experiment (hep-ex), polarized beam [p], High Energy Physics - Phenomenology (hep-ph), semi-inclusive reaction [deep inelastic scattering], Polarization, leptoproduction [pi], Nuclear Experiment (nucl-ex), Collins, Nuclear Experiment, Spin-½, Quantum chromodynamics, Physics, FINAL-STATE INTERACTIONS, deep inelastic scattering: semi-inclusive reaction, PIONS, lepton: beam, ddc:530, QUARK POLARIZATION, scattering [lepton], anti-p, beam [lepton], High Energy Physics - Phenomenology, modulation, DESY HERA Stor, Fixed target experiments, kinematics, 3 [dimension], QCD, FRAGMENTATION, spin: asymmetry, electron p: deep inelastic scattering, Nuclear and High Energy Physics, DRELL-YAN, transverse [polarization], p: polarized beam, Socio-culturale, FOS: Physical sciences, lepton: scattering, SIVERS ASYMMETRIES, Nuclear physics, phase space, PE2_2, Pion, PE2_1, 0103 physical sciences, polarization: transverse, DISTRIBUTIONS, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, 010306 general physics, PE2_3, pi: leptoproduction, 010308 nuclear & particles physics, Scattering, ELECTROPRODUCTION, 530 Physik, Orientation (vector space), Antiproton, deep inelastic scattering [electron p], lcsh:QC770-798, High Energy Physics::Experiment, asymmetry [spin], experimental results, Lepton
Abstract: Journal of high energy physics 2020(12), 010 (2020). doi:10.1007/JHEP12(2020)010, A comprehensive set of azimuthal single-spin and double-spin asymmetries in semi-inclusive leptoproduction of pions, charged kaons, protons, and antiprotons from transversely polarized protons is presented. These asymmetries include the previously published HERMES results on Collins and Sivers asymmetries, the analysis of which has been extended to include protons and antiprotons and also to an extraction in a three-dimensional kinematic binning and enlarged phase space. They are complemented by corresponding results for the remaining four single-spin and four double-spin asymmetries allowed in the one-photon-exchange approximation of the semi-inclusive deep-inelastic scattering process for target-polarization orientation perpendicular to the direction of the incoming lepton beam. Among those results, significant non-vanishing $\cos(\phi−\phi_S)$ modulations provide evidence for a sizable worm-gear (II) distribution, $g_{1T}(x,p_T^2)$. Most of the other modulations are found to be consistent with zero with the notable exception of large $\sin(\phi_S)$ modulations for charged pions and $K^+$., Published by SISSA, [Trieste]
Published: 2020
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13. TMD’s in Drell-Yan Processes.

Author: Anselmino, M., Boglione, M., D'Alesio, U., Melis, S., Murgia, F., and Prokudin, A.
Subjects: *PARTICLES (Nuclear physics), *NUCLEAR cross sections, *NUCLEAR physics, *HADRONS, *SHEAR waves
Abstract: Drell-Yan processes allow to fully explore the partonic structure of hadrons due to the presence of a purely leptonic final state. Thus, Transverse Momentum Dependent distributions (TMD’s), like the Sivers and the Boer-Mulders functions and the Transversity distribution, can be directly accessed. A formal expression for the cross section of the unpolarized and single polarized Drell-Yan (DY) processes including TMD’s is presented. Using our latest extraction of the Sivers functions from a fit on SIDIS data, we give some estimations of the Sivers effect in DY processes. [ABSTRACT FROM AUTHOR]
Published: 2009
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14. FUTURE DRELL-YAN MEASUREMENT @ COMPASS.

Author: Colantoni, M.
Subjects: DISTRIBUTION (Probability theory), PARTONS, DEEP inelastic collisions, LEPTONS (Nuclear physics), QUARKS
Published: 2009

15. MEASUREMENT OF COLLINS AND SIVERS ASYMMETRIES AT HERMES.

Author: Pappalardo, L. L.
Subjects: QUARKS, KAONS, PARTICLES (Nuclear physics), MOMENTUM (Mechanics), INELASTIC scattering
Published: 2009

16. Transversity Physics Results from PHENIX.

Author: Chiu, M., Smith, W. H., and Dasu, S. R.
Subjects: *POLARIZATION (Nuclear physics), *COLLISIONS (Nuclear physics), *PROTONS, *HADRONS, *NUCLEAR physics, *PHYSICS
Abstract: During the 2001–2002 proton run at RHIC, PHENIX collected an integrated luminosity of 0.15 pb-1 of transversely polarized proton collisions at a √s = 200GeV/c. With this dataset the transverse single-spin asymmetry AN for π0 and non-identified charged hadrons at XF = 0 has been measured up to p⊥ = 5 GeV/c. Transverse Single Spin Asymmetries (SSA) are thought to come from at least three mechanisms, and in the future PHENIX will be able to decouple contributions to SSA from the Sivers function by measuring asymmetries in the back-to-back correlation in azimuthal angle of two high-p⊥ hadrons. [ABSTRACT FROM AUTHOR]
Published: 2005
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17. Process dependent Sivers function and implication for single spin asymmetry in inclusive hadron production

Author: Kang, Z
Published: 2010

18. Positivity bounds for Sivers functions

Author: Soffer, J
Published: 2010

19. Azimuthal single- and double-spin asymmetries in semi-inclusive deep-inelastic lepton scattering by transversely polarized protons

Author: Airapetian, A., Akopov, N., Akopov, Z., Aschenauer, E. C., Augustyniak, W., Avakian, R., Bacchetta, A., Belostotski, S., Bryzgalov, V., Capitani, G. P., Cisbani, E., Ciullo, G., Contalbrigo, M., Deconinck, W., De Leo, R., De Sanctis, E., Diefenthaler, M., Di Nezza, P., Düren, M., Elbakian, G., Ellinghaus, F., Fantoni, A., Felawka, L., Gavrilov, G., Gharibyan, V., Holler, Y., Ivanilov, A., Jackson, H. E., Joosten, S., Kaiser, R., Karyan, G., Kinney, E., Kisselev, A., Kozlov, V., Kravchenko, P., Lagamba, L., Lapikás, L., Lenisa, P., Lorenzon, W., Manaenkov, S. I., Marianski, B., Marukyan, H., Miyachi, Y., Movsisyan, A., Muccifora, V., Naryshkin, Y., Nass, A., Nazaryan, G., Nowak, W.-D., Pappalardo, L. L., Reimer, P. E., Reolon, A. R., Riedl, C., Rith, K., Rosner, G., Rostomyan, A., Rubin, J., Ryckbosch, D., Schäfer, A., Schnell, G., Seitz, B., Shibata, T.-A., Shutov, V., Statera, M., Terkulov, A., Tytgat, M., Van Haarlem, Y., Van Hulse, C., Veretennikov, D., Vilardi, I., Yaschenko, S., Zeiler, D., Zihlmann, B., and Zupranski, P.
Subjects: electron p: deep inelastic scattering, pi: leptoproduction, deep inelastic scattering: semi-inclusive reaction, dimension: 3, p: polarized beam, Nuclear Theory, lepton: beam, HERMES, lepton: scattering, anti-p, Sivers function, modulation, phase space, DESY HERA Stor, kinematics, polarization: transverse, High Energy Physics::Experiment, Collins, Nuclear Experiment, spin: asymmetry, experimental results
Abstract: A comprehensive set of azimuthal single-spin and double-spin asymmetries in semi-inclusive leptoproduction of pions, charged kaons, protons, and antiprotons from transversely polarized protons is presented. These asymmetries include the previously published HERMES results on Collins and Sivers asymmetries, the analysis of which has been extended to include protons and antiprotons and also to an extraction in a three-dimensional kinematic binning and enlarged phase space. They are complemented by corresponding results for the remaining four single-spin and four double-spin asymmetries allowed in the one-photon-exchange approximation of the semi-inclusive deep-inelastic scattering process for target-polarization orientation perpendicular to the direction of the incoming lepton beam. Among those results, significant non-vanishing $\cos{\phi-\phi_S}$ modulations provide evidence for a sizable worm-gear (II) distribution, $g_{1T}$. Most of the other modulations are found to be consistent with zero with the notable exception of large $\sin{\phi_S}$ modulations for charged pions and positive kaons.
Published: 2020
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20. Probing the Gluon Sivers Function with an Unpolarized Target: GTMD Distributions and the Odderons

Author: Lech Szymanowski, Renaud Boussarie, Samuel Wallon, Yoshitaka Hatta, Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sorbonne (UP4)
Subjects: exclusive reaction, Particle physics, Nuclear Theory, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], High Energy Physics::Lattice, FOS: Physical sciences, General Physics and Astronomy, pi: production, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, High Energy Physics - Experiment, Sivers function, electron p: scattering, Nuclear Theory (nucl-th), High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Pion, quantum chromodynamics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], polarization: transverse, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Nuclear theory, Nuclear Physics, Quantum chromodynamics, Physics, Scattering, High Energy Physics::Phenomenology, nucleon, odderon, gluon, Function (mathematics), Gluon, High Energy Physics - Phenomenology, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, Nucleon
Abstract: It is commonly believed that the Sivers function has uniquely to do with processes involving a transversely polarized nucleon. In this paper we show that it is not necessarily the case. We demonstrate that exclusive pion production in $un$polarized electron-proton scattering in the forward region is a direct probe of the gluon Sivers function due to its connection to the QCD Odderon., Comment: 6 pages, 1 figure
Published: 2020
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21. THE PIONIC DRELL-YAN PROCESS: A BRIEF SURVEY.

Author: CHANG, WEN-CHEN and DUTTA, DIPANGKAR
Subjects: *PIONS, *HADRONS, *PARTONS, *DILEPTON production, *ANGULAR distribution (Nuclear physics), *QUANTUM chromodynamics, *EMC effect (Nuclear physics), *QUARK-antiquark interactions
Abstract: The Drell-Yan process is an invaluable tool for probing the structure of hadrons, and the pion-induced Drell-Yan process is unique in its sensitivity to several subtleties of the partonic structure. This is a brief review of the pionic Drell-Yan process with particular emphasis on the dilepton angular distributions and nuclear modification of the parton distributions (the EMC effect). [ABSTRACT FROM AUTHOR]
Published: 2013
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22. Process dependent Sivers function and implication for single spin asymmetry in inclusive hadron production

Author: Gamberg, Leonard and Kang, Zhong-Bo
Subjects: *HADRONS, *PARTONS, *PHOTONS, *COLLIDERS (Nuclear physics), *MATHEMATICAL physics, *TWIST mappings (Mathematics)
Abstract: Abstract: We study the single transverse spin asymmetries in the single inclusive particle production within the framework of the generalized parton model (GPM). By carefully analyzing the initial- and final-state interactions, we include the process-dependence of the Sivers functions into the GPM formalism. The modified GPM formalism has a close connection with the collinear twist-3 approach. Within the new formalism, we make predictions for inclusive and direct photon productions at RHIC energies. We find the predictions are opposite to those in the conventional GPM approach. [ABSTRACT FROM AUTHOR]
Published: 2011
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23. Positivity bounds for Sivers functions

Author: Kang, Zhong-Bo and Soffer, Jacques
Subjects: *SYMMETRY (Physics), *CONSTRAINTS (Physics), *NUCLEAR spin, *BOUND states, *CP violation
Abstract: Abstract: We generalize a positivity constraint derived initially for parity-conserving processes to the parity-violating ones, and use it to derive non-trivial bounds on several Sivers functions, entering in the theoretical description of single spin asymmetry for various processes. [Copyright &y& Elsevier]
Published: 2011
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24. Sivers function in light-cone quark model and azimuthal spin asymmetries in pion electroproduction

Author: Lü, Zhun and Ma, Bo-Qiang
Subjects: *QUARK models, *WAVE functions, *CONSTITUTION of matter, *CONFIGURATION space, *WAVE mechanics
Abstract: We perform a calculation of Sivers function in a light-cone SU(6) quark–diquark model with both scalar diquark and vector diquark spectators. We derive the transverse momentum dependent light-cone wave function of the proton by taking into account the Melosh–Wigner rotation. By adopting one-gluon exchange, we obtain a non-vanishing Sivers function of down quark from interference of proton spin amplitudes. We analyze the &z.sfnc;Ph⊥&z.sfnc;/M weighted Sivers asymmetries in π+, π- and π0 electroproduction off transverse polarized proton target, averaged and not averaged by the kinematics of HERMES experiment. [Copyright &y& Elsevier]
Published: 2004
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25. Study of the potential transverse momentum and potential angular momentum within the scalar diquark model

Author: Amor-Quiroz, David Arturo, Burkardt, Matthias, Focillon, William, Lorcé, Cédric, Centre de Physique Théorique [Palaiseau] (CPHT), and École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
Subjects: High Energy Physics - Theory, energy: high, [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], Nuclear Theory, High Energy Physics::Phenomenology, scattering, lattice field theory, FOS: Physical sciences, transverse momentum, angular momentum, initial-state interaction, spectator, final-state interaction, quark, Sivers function, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], diquark: scalar
Abstract: We make use of a simple scalar diquark model to study the potential transverse momentum and potential angular momentum, defined as the difference between the Jaffe-Manohar and Ji notions of transverse momentum and orbital angular momentum, respectively. A non-vanishing potential angular momentum has been previously found in lattice calculations and is believed to appear due to the effects of initial/final state interactions between the spectator system and the struck quark in high energy scattering processes. Such re-scattering phenomena are similar in nature to those who are responsible for generating the Sivers shift. This motivates us to search for an estimate of the potential angular momentum in terms of the expectation value of the transverse momentum of the struck quark., Comment: Presented at the Workshop of QCD and Forward Physics at the EIC, the LHC, and Cosmic Ray Physics in Guanajuato, Mexico, November 18-21 2019
Published: 2019

26. Physics Beyond Colliders: QCD Working Group Report

Author: Dainese, A., Diehl, M., Di Nezza, P., Friedrich, J., Gaździcki, M., Graziani, G., Hadjidakis, C., Jäckel, J., Lansberg, J. P., Magnon, A., Mallot, G., Vidal, F. Martinez, Massacrier, L. M., Nemenov, L., Neri, N., Pawlowski, J. M., Puławski, S. M., Schacher, J., Schnell, G., Stocchi, A., Usai, G. L., Vallée, C., Venanzoni, G., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), QCD Working Group, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Drell-Yan process, p p: scattering, CERN Lab, heavy ion: scattering, Nuclear Theory, Physics::Instrumentation and Detectors, High Energy Physics::Lattice, energy loss, p nucleus: interaction, pi: structure function, FOS: Physical sciences, K: secondary beam, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], muon p: elastic scattering, gluon: polarization, COMPASS, High Energy Physics - Experiment, Nuclear Theory (nucl-th), Sivers function, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), ALICE, quantum chromodynamics, target: wire, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment, bent crystal, gas: polarized target, hadron spectroscopy, High Energy Physics::Phenomenology, nuclear matter: effect, nucleon: structure function, collective phenomena, High Energy Physics - Phenomenology, CERN LHC Coll, forward production, Physics::Accelerator Physics, High Energy Physics::Experiment, proposed experiment, quark: polarization, lead: nucleus, resonance: production
Abstract: International audience; This report summarises the main findings of the QCD Working Group in the CERN Physics Beyond Colliders Study.
Published: 2019

27. Measurement of P T -weighted Sivers asymmetries in leptoproduction of hadrons

Author: Alexeev, M.G., Alexeev, G.D., Amoroso, A., Andrieux, V., Anfimov, N.V., Anosov, V., Antoshkin, A., Augsten, K., Augustyniak, W., Azevedo, C.D.R., Badełek, B., Balestra, F., Ball, M., Barth, J., Barone, V., Beck, R., Bedfer, Y., Bernhard, J., Bicker, K., Bielert, E.R., Bodlak, M., Bordalo, P., Bradamante, F., Bressan, A., Büchele, M., Burtsev, V.E., Chang, W.-C., Chatterjee, C., Chiosso, M., Chumakov, A.G., Chung, S.-U., Cicuttin, A., Crespo, M.L., Dalla Torre, S., Dasgupta, S.S., Dasgupta, S., Denisov, O.Yu., Dhara, L., Donskov, S.V., Doshita, N., Dreisbach, Ch., Dünnweber, W., Dusaev, R.R., Dziewiecki, M., Efremov, A., Elia, C., Eversheim, P.D., Faessler, M., Ferrero, A., Finger, M., Finger, Michael, Jr., Fischer, H., Franco, C., du Fresne von Hohenesche, N., Friedrich, J.M., Frolov, V., Gautheron, F., Gavrichtchouk, O.P., Gerassimov, S., Giarra, J., Gnesi, I., Gorzellik, M., Grasso, A., Gridin, A., Grosse Perdekamp, M., Grube, B., Guskov, A., Hahne, D., Hamar, G., von Harrach, D., Heitz, R., Herrmann, F., Horikawa, N., d'Hose, N., Hsieh, C.-Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Jörg, P., Juraskova, K., Kabuß, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khaustov, G.V., Khokhlov, Yu.A., Kisselev, Yu., Klein, F., Koivuniemi, J.H., Kolosov, V.N., Kondo, K., Konorov, I., Konstantinov, V.F., Kotzinian, A.M., Kouznetsov, O.M., Kral, Z., Krämer, M., Krinner, F., Kroumchtein, Z.V., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R.P., Kveton, A., Lednev, A.A., Levorato, S., Lian, Y.-S., Lichtenstadt, J., Longo, R., Lyubovitskij, V.E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G.K., Mamon, S.A., Marianski, B., Martin, A., Marzec, J., Matoušek, J., Matsuda, T., Meshcheryakov, G.V., Meyer, M., Meyer, W., Mikhailov, Yu.V., Mikhasenko, M., Mitrofanov, E., Mitrofanov, N., Miyachi, Y., Moretti, A., Nagaytsev, A., Neyret, D., Nový, J., Nowak, W.-D., Nukazuka, G., Nunes, A.S., Olshevsky, A.G., Orlov, I., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Peng, J.-C., Pereira, F., Pešek, M., Pešková, M., Peshekhonov, D.V., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V.A., Pretz, J., Quaresma, M., Quintans, C., Ramos, S., Regali, C., Reicherz, G., Riedl, C., Ryabchikov, D.I., Rybnikov, A., Rychter, A., Salac, R., Samoylenko, V.D., Sandacz, A., Sarkar, S., Savin, I.A., Sawada, T., Sbrizzai, G., Schiavon, P., Schmieden, H., Seder, E., Selyunin, A., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Smolik, J., Sozzi, F., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Szabelski, A., Szameitat, T., Sznajder, P., Tasevsky, M., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Tskhay, V., Uhl, S., Vasilishin, B.I., Vauth, A., Veit, B.M., Veloso, J., Vidon, A., Virius, M., Wagner, M., Wallner, S., Wilfert, M., Zaremba, K., Zavada, P., Zavertyaev, M., Zhao, Y., Zemlyanichkina, E., Ziembicki, M., Alexeev, M. G., Alexeev, G. D., Amoroso, A., Andrieux, V., Anfimov, N. V., Anosov, V., Antoshkin, A., Augsten, K., Augustyniak, W., Azevedo, C. D. R., Badełek, B., Balestra, F., Ball, M., Barth, J., Barone, V., Beck, R., Bedfer, Y., Bernhard, J., Bicker, K., Bielert, E. R., Bodlak, M., Bordalo, P., Bradamante, F., Bressan, A., Büchele, M., Burtsev, V. E., Chang, W. -C., Chatterjee, C., Chiosso, M., Chumakov, A. G., Chung, S. -U., Cicuttin, A., Crespo, M. L., Dalla Torre, S., Dasgupta, S. S., Dasgupta, S., Denisov, O. Yu., Dhara, L., Donskov, S. V., Doshita, N., Dreisbach, Ch., Dünnweber, W., Dusaev, R. R., Dziewiecki, M., Efremov, A., Elia, C., Eversheim, P. D., Faessler, M., Ferrero, A., Finger, M., Fischer, H., Franco, C., du Fresne von Hohenesche, N., Friedrich, J. M., Frolov, V., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Gnesi, I., Gorzellik, M., Grasso, A., Gridin, A., Grosse Perdekamp, M., Grube, B., Guskov, A., Hahne, D., Hamar, G., von Harrach, D., Heitz, R., Herrmann, F., Horikawa, N., D'Hose, N., Hsieh, C. -Y., Huber, S., Ishimoto, S., Ivanov, A., Iwata, T., Jandek, M., Jary, V., Joosten, R., Jörg, P., Juraskova, K., Kabuß, E., Kaspar, F., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Yu. A., Kisselev, Yu., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Kondo, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Kral, Z., Krämer, M., Krinner, F., Kroumchtein, Z. V., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lednev, A. A., Levorato, S., Lian, Y. -S., Lichtenstadt, J., Longo, R., Lyubovitskij, V. E., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Mamon, S. A., Marianski, B., Martin, A., Marzec, J., Matoušek, J., Matsuda, T., Meshcheryakov, G. V., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mikhasenko, M., Mitrofanov, E., Mitrofanov, N., Miyachi, Y., Moretti, A., Nagaytsev, A., Neyret, D., Nový, J., Nowak, W. -D., Nukazuka, G., Nunes, A. S., Olshevsky, A. G., Orlov, I., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Peng, J. -C., Pereira, F., Pešek, M., Pešková, M., Peshekhonov, D. V., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Ramos, S., Regali, C., Reicherz, G., Riedl, C., Ryabchikov, D. I., Rybnikov, A., Rychter, A., Salac, R., Samoylenko, V. D., Sandacz, A., Sarkar, S., Savin, I. A., Sawada, T., Sbrizzai, G., Schiavon, P., Schmieden, H., Seder, E., Selyunin, A., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Smolik, J., Sozzi, F., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Szabelski, A., Szameitat, T., Sznajder, P., Tasevsky, M., Tessaro, S., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Tskhay, V., Uhl, S., Vasilishin, B. I., Vauth, A., Veit, B. M., Veloso, J., Vidon, A., Virius, M., Wagner, M., Wallner, S., Wilfert, M., Zaremba, K., Zavada, P., Zavertyaev, M., Zhao, Y., Zemlyanichkina, E., Ziembicki, M., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and COMPASS
Subjects: Nuclear and High Energy Physics, Nuclear Theory, FOS: Physical sciences, hadron: transverse momentum, COMPASS, fragmentation function, High Energy Physics - Experiment, hadron: leptoproduction, p: target, Sivers function, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], polarization: transverse, Nuclear Experiment, spin: transverse, Particle Physics - Phenomenology, hep-ex, hep-ph, distribution function: transverse momentum dependence, semi-inclusive reaction, High Energy Physics - Phenomenology, spin: asymmetry: measured, nucleon: spin, High Energy Physics::Experiment, quark: polarization, Particle Physics - Experiment
Abstract: The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum $P_T$, allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. Using the high-statistics data collected by the COMPASS Collaboration in 2010 with a transversely polarised proton target, we have evaluated two types of $P_T$-weighted Sivers asymmetries, which are both proportional to the product of the firsttransverse moment of the Sivers function and of the fragmentation function. The results are compared to the standard unweighted Sivers asymmetries and used to extract the first transverse moments of the Sivers distributions for $u$ and $d$ quarks., Comment: 23 pages, 12 figures
Published: 2019

28. Reweighting the Sivers function with jet data from STAR

Author: Mariaelena Boglione, Umberto D'Alesio, Francesco Murgia, Alexei Prokudin, Carlo Flore, J. O. Gonzalez-Hernandez, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quark, p p: scattering, Nuclear and High Energy Physics, Particle physics, media_common.quotation_subject, FOS: Physical sciences, Single spin asymmetry, Jet (particle physics), transverse momentum dependence, SIDIS, 01 natural sciences, Asymmetry, statistics: Bayesian, High Energy Physics - Experiment, quark, Sivers function, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), statistical analysis, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Brookhaven RHIC Coll, media_common, Spin-½, Physics, STAR, deep inelastic scattering: semi-inclusive reaction, 010308 nuclear & particles physics, Function (mathematics), Deep inelastic scattering, lcsh:QC1-999, Bayesian statistics, Data set, High Energy Physics - Phenomenology, jet: production, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Reweighting, spin: asymmetry, lcsh:Physics
Abstract: The reweighting procedure that using Bayesian statistics incorporates the information contained in a new data set, without the need of re-fitting, is applied to the quark Sivers function extracted from Semi-Inclusive Deep Inelastic Scattering (SIDIS) data. We exploit the recently published single spin asymmetry data for the inclusive jet production in polarized $pp$ collisions from the STAR Collaboration at RHIC, which cover a much wider $x$ region compared to SIDIS measurements. The reweighting method is extended to the case of asymmetric errors and the results show a remarkable improvement of the knowledge of the quark Sivers function., 9 pages, 5 figures
Published: 2021

29. A Fixed-Target Programme at the LHC: Physics Case and Projected Performances for Heavy-Ion, Hadron, Spin and Astroparticle Studies

Author: Laure Marie Massacrier, C. Hadjidakis, A. Zelenski, D. P. Kikola, J. Seixas, E.G. Ferreiro, Jakub Wagner, Zishuo Yang, Nataliya Topilskaya, W. Scandale, A. Klein, S. Porteboeuf Houssais, Cédric Lorcé, Patrick Robbe, Jean-Philippe Lansberg, Antonio Uras, C. L. Da Silva, Andrea Signori, Barbara Antonina Trzeciak, Miguel G. Echevarria, I. Hřivnáčová, G. Cavoto, F. Donato, Hua-Sheng Shao, Florian Lyonnet, Stanley J. Brodsky, Nodoka Yamanaka, A. B. Kurepin, C. Quintans, Ingo Schienbein, A. Rakotozafindrabe, A. Kusina, Y. I. Makdisi, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne (UCA)-Centre National de la Recherche Scientifique (CNRS), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de l'Accélérateur Linéaire (LAL), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: heavy ion: scattering, Nuclear Theory, Physics::Instrumentation and Detectors, p nucleus: interaction, Hadron, heavy-ion physics, General Physics and Astronomy, parton: distribution function, beam transport, nucl-ex, hadron structure, fixed-target program for the Large Hadron Collider, 01 natural sciences, COMPASS, High Energy Physics - Experiment, Sivers function, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), ALICE, Compass, target: wire, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment, bent crystal, gas: polarized target, Spin-½, Physics, Large Hadron Collider, Detector, hep-ph, collective phenomena, hadronization, nuclear physics, TMD physics, spin physics, astrophysics, Proton (rocket family), High Energy Physics - Phenomenology, CERN LHC Coll, Nuclear Physics - Theory, proposed experiment, Particle Physics - Experiment, performance, astroparticles, p p: scattering, nucl-th, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], energy loss, FOS: Physical sciences, Context (language use), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], gluon: polarization, Nuclear Theory (nucl-th), Nuclear physics, 0103 physical sciences, Nuclear Physics - Experiment, heavy ion physics, 010306 general physics, Particle Physics - Phenomenology, hep-ex, 010308 nuclear & particles physics, transverse momentum: dependence, nuclear matter: effect, nucleon: structure function, LHC-B, Beamline, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Physics::Accelerator Physics, nucleon: spin, ion, quarkonium: hadroproduction, quark: polarization
Abstract: We review the context, the motivations and the expected performances of a comprehensive and ambitious fixed-target program using the multi-TeV proton and ion LHC beams. We also provide a detailed account of the different possible technical implementations ranging from an internal wire target to a full dedicated beam line extracted with a bent crystal. The possibilities offered by the use of the ALICE and LHCb detectors in the fixed-target mode are also reviewed., LaTeX, 115 pages. v2: version submitted to Physics Reports. A few figures added and some text improved. v3: accepted for publication in Physics Reports
Published: 2018

30. Reweighting the Sivers function with jet data from STAR.

Author: Boglione, M., D'Alesio, U., Flore, C., Gonzalez-Hernandez, J.O., Murgia, F., and Prokudin, A.
Subjects: *DEEP inelastic collisions, *STELLAR collisions, *QUARKS
Abstract: The reweighting procedure that using Bayesian statistics incorporates the information contained in a new data set, without the need of re-fitting, is applied to the quark Sivers function extracted from Semi-Inclusive Deep Inelastic Scattering (SIDIS) data. We exploit the recently published single spin asymmetry data for the inclusive jet production in polarized pp collisions from the STAR Collaboration at RHIC, which cover a much wider x region compared to SIDIS measurements. The reweighting method is extended to the case of asymmetric errors and the results show a remarkable improvement of the knowledge of the quark Sivers function. [ABSTRACT FROM AUTHOR]
Published: 2021
Full Text: View/download PDF

31. First Measurement of Transverse-Spin-Dependent Azimuthal Asymmetries in the Drell-Yan Process

Author: Aghasyan, M., Akhunzyanov, R., Alexeev, G. D., Alexeev, M. G., Amoroso, A., Andrieux, V., Anfimov, N. V., Anosov, V., Antoshkin, A., Augsten, K., Augustyniak, W., Austregesilo, A., Azevedo, C. D. R., Badelek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bicker, K., Bielert, E. R., Birsa, R., Bodlak, M., Bordalo, P., Bradamante, F., Bressan, A., Buchele, M., Cchang, W. -C, Chatterjee, C., Chiosso, M., Choi, I., Chung, S. -U, Cicuttin, A., Crespo, M. L., Dalla Torre, S., Dasgupta, S. S., Dasgupta, S., Denisov, O. Yu., Dhara, L., Donskov, S. V., Doshita, N., Dreisbach, Ch., Duennweber, W., Dziewiecki, M., Efremov, A., Eversheim, P. D., Faessler, M., Ferrero, A., Finger, M., Finger, M., Jr., Fischer, H., Franco, C., von Hohenesche, N. du Fresne, Friedrich, J. M., Frolov, V., Fuchey, E., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, F., Gnesi, I., Gorzellik, M., Grasso, A., Perdekamp, M. Grosse, Grube, B., Grussenmeyer, T., Guskov, A., Hahne, D., Hamar, G., von Harrach, D., Heinsius, F. H., Heitz, R., Herrmann, F., Horikawa, N., d'Hose, N., Hsieh, C. -Y, Huber, S., Ishimoto, S., Ivanov, A., Ivanshin, Yu., Iwata, T., Jary, V., Joosten, R., Joerg, P., Kabuss, E., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Yu. A., Kisselev, Yu., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Kondo, K., Koenigsmann, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Kral, Z., Kraemer, M., Kremser, P., Krinner, F., Kroumchtein, Z. V., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lednev, A. A., Levillain, M., Levorato, S., Lian, Y. -S, Lichtenstadt, J., Longo, R., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Marianski, B., Martin, A., Marzec, J., Matousek, J., Matsuda, H., Matsuda, T., Meshcheryakov, G. V., Meyer, M., Meyer, W., Mikhailov, Yu. V., Mikhasenko, M., Mitrofanov, E., Mitrofanov, N., Miyachi, Y., Nagaytsev, A., Nerling, F., Neyret, D., Novy, J., Nowak, W. -D, Nukazuka, G., Nunes, A. S., Olshevsky, A. G., Orlov, I., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Peng, J. -C, Pereira, F., Pesek, M., Peshekhonov, D. V., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Ramos, S., Regali, C., Reicherz, G., Riedl, C., Rogacheva, N. S., Roskot, M., Ryabchikov, D. I., Rybnikov, A., Rychter, A., Salac, R., Samoylenko, V. D., Sandacz, A., Santos, C., Sarkar, S., Savin, I. A., Sawada, T., Sbrizzai, G., Schiavon, P., Schmidt, K., Schmieden, H., Schönning, Karin, Seder, E., Selyunin, A., Shevchenko, O. Yu., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Smolik, J., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Szabelski, A., Szameitat, T., Sznajder, P., Takewaka, S., Tasevsky, M., Tessaro, S., Terca, G., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Tskhay, V., Uhl, S., Vauth, A., Veloso, J., Virius, M., Vit, M., Vondra, J., Wallner, S., Weisrock, T., Wilfert, M., ter Wolbeek, J., Zaremba, K., Zavada, P., Zavertyaev, M., Zemlyanichkina, E., Zhuravlev, N., Ziembicki, M., Aghasyan, M., Akhunzyanov, R., Alexeev, G. D., Alexeev, M. G., Amoroso, A., Andrieux, V., Anfimov, N. V., Anosov, V., Antoshkin, A., Augsten, K., Augustyniak, W., Austregesilo, A., Azevedo, C. D. R., BadeÅ‚ek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bicker, K., Bielert, E. R., Birsa, R., Bodlak, M., Bordalo, P., Bradamante, F., Bressan, A., Bã¼chele, M., Chang, W. -. C., Chatterjee, C., Chiosso, M., Choi, I., Chung, S. -. U., Cicuttin, A., Crespo, M. L., Dalla Torre, S., Dasgupta, S. S., Dasgupta, S., Denisov, O. Y. u., Dhara, L., Donskov, S. V., Doshita, N., Dreisbach, C. h., Dã¼nnweber, W., Dziewiecki, M., Efremov, A., Eversheim, P. D., Faessler, M., Ferrero, A., Finger, M., Fischer, H., Franco, C., Du Fresne Von Hohenesche, N., Friedrich, J. M., Frolov, V., Fuchey, E., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, F., Gnesi, I., Gorzellik, M., Grasso, A., Grosse Perdekamp, M., Grube, B., Grussenmeyer, T., Guskov, A., Hahne, D., Hamar, G., Von Harrach, D., Heinsius, F. H., Heitz, R., Herrmann, F., Horikawa, N., D'Hose, N., Hsieh, C. -. Y., Huber, S., Ishimoto, S., Ivanov, A., Ivanshin, Y. u., Iwata, T., Jary, V., Joosten, R., Jã¶rg, P., Kabuãÿ, E., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Y. u. A., Kisselev, Y. u., Klein, F., Koivuniemi, J. H., Kolosov, V. N., Kondo, K., Kã¶nigsmann, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Kral, Z., Krã¤mer, M., Kremser, P., Krinner, F., Kroumchtein, Z. V., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R. P., Kveton, A., Lednev, A. A., Levillain, M., Levorato, S., Lian, Y. -. S., Lichtenstadt, J., Longo, R., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Marianski, B., Martin, A., Marzec, J., Matouå¡ek, J., Matsuda, H., Matsuda, T., Meshcheryakov, G. V., Meyer, M., Meyer, W., Mikhailov, Y. u. V., Mikhasenko, M., Mitrofanov, E., Mitrofanov, N., Miyachi, Y., Nagaytsev, A., Nerling, F., Neyret, D., Novã½, J., Nowak, W. -. D., Nukazuka, G., Nunes, A. S., Olshevsky, A. G., Orlov, I., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Peng, J. -. C., Pereira, F., Peå¡ek, M., Peshekhonov, D. V., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Ramos, S., Regali, C., Reicherz, G., Riedl, C., Rogacheva, N. S., Roskot, M., Ryabchikov, D. I., Rybnikov, A., Rychter, A., Salac, R., Samoylenko, V. D., Sandacz, A., Santos, C., Sarkar, S., Savin, I. A., Sawada, T., Sbrizzai, G., Schiavon, P., Schmidt, K., Schmieden, H., Schã¶nning, K., Seder, E., Selyunin, A., Shevchenko, O. Y. u., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Smolik, J., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Szabelski, A., Szameitat, T., Sznajder, P., Takewaka, S., Tasevsky, M., Tessaro, S., Terã§a, G., Tessarotto, F., Thiel, A., Tomsa, J., Tosello, F., Tskhay, V., Uhl, S., Vauth, A., Veloso, J., Virius, M., Vit, M., Vondra, J., Wallner, S., Weisrock, T., Wilfert, M., Ter Wolbeek, J., Zaremba, K., Zavada, P., Zavertyaev, M., Zemlyanichkina, E., Zhuravlev, N., Ziembicki, M., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), COMPASS, Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, and Commissariat à l'énergie atomique et aux énergies alternatives ( CEA )
Subjects: Drell-Yan process, ComputerSystemsOrganization_COMPUTERSYSTEMIMPLEMENTATION, Nuclear Theory, General Physics and Astronomy, parton: distribution function, transverse momentum dependence, 01 natural sciences, COMPASS, High Energy Physics - Experiment, Sivers function, High Energy Physics - Experiment (hep-ex), semi-inclusive reaction [deep inelastic scattering], High Energy Physics - Phenomenology (hep-ph), ddc:550, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, transversity, Physics, Quantum chromodynamics, (muon+ muon-) [mass spectrum], Large Hadron Collider, deep inelastic scattering: semi-inclusive reaction, polarized target: transverse, 190 GeV/c, transverse [polarized target], nucleon, Drell–Yan process, hep-ph, dimuon: mass spectrum, Azimuth, High Energy Physics - Phenomenology, Transverse plane, asymmetry [angular distribution], pi- nucleus: scattering, mass spectrum [dimuon], distribution function [parton], Nucleon, spin: asymmetry, Particle Physics - Experiment, Particle physics, angular distribution: asymmetry, scattering [pi- nucleus], ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, FOS: Physical sciences, ComputerApplications_COMPUTERSINOTHERSYSTEMS, Accelerator Physics and Instrumentation, GeneralLiterature_MISCELLANEOUS, Nuclear physics, Physics and Astronomy (all), [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, quantum chromodynamics, universality, 010306 general physics, Particle Physics - Phenomenology, 010308 nuclear & particles physics, hep-ex, High Energy Physics::Phenomenology, Acceleratorfysik och instrumentering, CERN SPS, mass spectrum: (muon+ muon-), ComputingMethodologies_PATTERNRECOGNITION, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Physics::Accelerator Physics, [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, asymmetry [spin], experimental results
Abstract: The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use the CERN SPS 190 GeV/$c$, $\pi^{-}$ beam and a transversely polarized ammonia target. Three azimuthal asymmetries giving access to different transverse-momentum-dependent (TMD) parton distribution functions (PDFs) are extracted using dimuon events with invariant mass between 4.3 GeV/$c^2$ and 8.5 GeV/$c^2$. The observed sign of the Sivers asymmetry is found to be consistent with the fundamental prediction of Quantum Chromodynamics (QCD) that the Sivers TMD PDFs extracted from DY have a sign opposite to the one extracted from semi-inclusive deep-inelastic scattering (SIDIS) data. We present two other asymmetries originating from the pion Boer-Mulders TMD PDFs convoluted with either the nucleon transversity or pretzelosity TMD PDFs. These DY results are obtained at a hard scale comparable to that of a recent COMPASS SIDIS measurement and hence allow unique tests of fundamental QCD universality predictions., Comment: 11 pages, 6 figures
Published: 2017

32. Sivers asymmetry extracted in SIDIS at the hard scales of the Drell-Yan process at COMPASS

Author: V. Andrieux, S. Grabmüller, Adam Szabelski, Alexandr Selyunin, W. Eyrich, K. Schmidt, Andrea Ferrero, Nour Makke, W. C. Chang, P. Kremser, M. Aghasyan, D.I. Ryabchikov, Jen-Chieh Peng, Norihiro Doshita, J. Pochodzalla, A. Nagaytsev, F. Balestra, A. Rychter, N. Pierre, W. Augustyniak, N. d'Hose, R. Longo, A. Thiel, V.N. Kolosov, P. Sznajder, K. Schönning, D. Steffen, J. Smolik, Miroslav Sulc, M. Tasevsky, E. Mitrofanov, P. Schiavon, O. Subrt, A. Lehmann, Q. Curiel, Andrew Ivanov, G. Nukazuka, D. von Harrach, C. Adolph, N.S. Rossiyskaya, F. Giordano, H. Matsuda, K. Klimaszewski, E. Seder, Celso Augusto Guimarães Santos, S. Gerassimov, Frank Klein, N. Horikawa, Y. Miyachi, A.A. Lednev, Yakov Petrovich Kulinich, Andres Cicuttin, I. Orlov, V.D. Samoylenko, P. Jörg, G. Reicherz, K. Königsmann, M. Slunecka, A. Magnon, O.P. Gavrichtchouk, Martin Bodlak, L. Sinha, S. Ramos, S. Dalla Torre, F. Tosello, S. Tessaro, V. Tskhay, S. Levorato, M. Wilfert, T. Matsuda, A. Zink, D. Hahne, D.V. Peshekhonov, Markus Ball, A. Sandacz, N. Mitrofanov, M. Finger, M. Ziembicki, K. Bicker, C. Franco, Yu. Ivanshin, A. Grasso, P. Bordalo, Takahiro Iwata, C. Regali, Yu.A. Khokhlov, L. Dhara, S.S. Dasgupta, M. Meyer, S. Platchkov, P. Zavada, G. Hamar, N. I. Zhuravlev, Federica Sozzi, F. H. Heinsius, Johannes Bernhard, Ch. Dreisbach, A. Guskov, M. Stolarski, W. Meyer, Maria Liz Crespo, C. Braun, B. Badelek, M. Grosse Perdekamp, A.V. Efremov, J. Vondra, M.G. Alexeev, M. V. Zavertyaev, Y.-S. Lian, I. Gnesi, F. Thibaud, J. Barth, F. Nerling, Mikhail Mikhasenko, B. Ketzer, Andrea Bressan, V. Jary, S. Uhl, J. Giarra, S. Takekawa, F. Pereira, Gerhard K. Mallot, Michal Dziewiecki, B. Grube, I. Konorov, F. Haas, C. Elia, G.V. Khaustov, R. Birsa, N. C. R. Makins, J. Lichtenstadt, M. Quaresma, J. Pretz, Alan D. Martin, H. Schmieden, Yu. Kisselev, Z.V. Kroumchtein, R. Salac, N. du Fresne von Hohenesche, T. Weisrock, J.M. Friedrich, E. Fuchey, Aram Kotzinian, C. Riedl, F. Kunne, D. Neyret, M. Ostrick, R.P. Kurjata, K. Zaremba, E.R. Bielert, Franco Bradamante, S. Huber, J.F.C.A. Veloso, S. Dasgupta, M. Virius, A. Maggiora, E. Zemlyanichkina, J. ter Wolbeek, A. Austregesilo, Jan Matousek, O.M. Kouznetsov, A. Srnka, V.A. Polyakov, M. Büchele, Arseniy Rybnikov, F. Krinner, J.H. Koivuniemi, V. Duic, W.-D. Nowak, J. Nový, G. Sbrizzai, A. Amoroso, T. Sawada, S.-U. Chung, M. Chiosso, M. Krämer, K. Kurek, M. Gorzellik, Nikolay Anfimov, François Herrmann, M. Faessler, R. Joosten, P.D. Eversheim, H. Suzuki, C.D.R. Azevedo, K. Kondo, Y. Bedfer, C. Chatterjee, Kamil Augsten, E. M. Kabuß, C. Quintans, I.A. Savin, S. Sarkar, S. V. Donskov, M. Pešek, A.S. Nunes, D. Panzieri, Janusz Marzec, T. Grussenmeyer, T. Szameitat, B. Marianski, Bakur Parsamyan, V.F. Konstantinov, S. Wallner, S. Ishimoto, H. Fischer, A.G. Olshevsky, Fabrice Gautheron, R. Akhunzyanov, G. D. Alexeev, W. Dünnweber, R. Heitz, V. Anosov, G.V. Meshcheryakov, Yu. V. Mikhailov, S. Sirtl, O.Yu. Denisov, F. Tessarotto, Laura Gonzalez Silva, M. Levillain, C.-Y. Hsieh, V. Frolov, Soumen Paul, M. Roskot, R. Beck, I. J. Choi, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, COMPASS, Adolph, C., Aghasyan, M., Akhunzyanov, R., Alexeev, M. G., Alexeev, G. D., Amoroso, A., Andrieux, V., Anfimov, N. V., Anosov, V., Augsten, K., Augustyniak, W., Austregesilo, A., Azevedo, C. D. R., Badełek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bicker, K., Bielert, E. R., Birsa, R., Bodlak, M., Bordalo, P., Bradamante, F., Braun, C., Bressan, Andrea, Büchele, M., Chang, W. C., Chatterjee, Chandradoy, Chiosso, M., Choi, I., Chung, S. U., Cicuttin, A., Crespo, M. L., Curiel, Q., Dalla Torre, S., Dasgupta, SHUDDHA SHANKAR, Dasgupta, S., Denisov, O. Y. u., Dhara, L., Donskov, S. V., Doshita, N., Dreisbach, C. h., Duic, Venicio, Dünnweber, W., Dziewiecki, M., Efremov, A., Eversheim, P. D., Eyrich, W., Faessler, M., Ferrero, A., Finger, M., Fischer, H., Franco, C., du Fresne von Hohenesche, N., Friedrich, J. M., Frolov, V., Fuchey, E., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, F., Gnesi, I., Gorzellik, M., Grabmüller, S., Grasso, A., Grosse Perdekamp, M., Grube, B., Grussenmeyer, T., Guskov, A., Haas, F., Hahne, D., Hamar, G., von Harrach, D., Heinsius, F. H., Heitz, R., Herrmann, F., Horikawa, N., D'Hose, N., Hsieh, C. Y., Huber, S., Ishimoto, S., Ivanov, A., Ivanshin, Y. u., Iwata, T., Jary, V., Joosten, R., Jörg, P., Kabuß, E., Ketzer, B., Khaustov, G. V., Khokhlov, Y. u. A., Kisselev, Y. u., Klein, F., Klimaszewski, K., Koivuniemi, J. H., Kolosov, V. N., Kondo, K., Königsmann, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Krämer, M., Kremser, P., Krinner, F., Kroumchtein, Z. V., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R. P., Lednev, A. A., Lehmann, A., Levillain, M., Levorato, Stefano, Lian, Y. S., Lichtenstadt, J., Longo, R., Maggiora, A., Magnon, A., Makins, N., Makke, Nour, Mallot, G. K., Marianski, B., Martin, Anna, Marzec, J., Matousek, Jan, Matsuda, H., Matsuda, T., Meshcheryakov, G. V., Meyer, M., Meyer, W., Mikhailov, Y. u. V., Mikhasenko, M., Mitrofanov, E., Mitrofanov, N., Miyachi, Y., Nagaytsev, A., Nerling, F., Neyret, D., Nový, J., Nowak, W. D., Nukazuka, G., Nunes, A. S., Olshevsky, A. G., Orlov, I., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Peng, J. C., Pereira, F., Pešek, M., Peshekhonov, D. V., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Ramos, S., Regali, C., Reicherz, G., Riedl, C., Roskot, M., Rossiyskaya, N. S., Ryabchikov, D. I., Rybnikov, A., Rychter, A., Salac, R., Samoylenko, V. D., Sandacz, A., Santos, C., Sarkar, S., Savin, I. A., Sawada, T., Sbrizzai, Giulio, Schiavon, Paolo, Schmidt, K., Schmieden, H., Schönning, K., Seder, E., Selyunin, A., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Smolik, J., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Szabelski, Adam, Szameitat, T., Sznajder, P., Takekawa, Stefano, Tasevsky, M., Tessaro, Susanna, Tessarotto, F., Thibaud, F., Thiel, A., Tosello, F., Tskhay, V., Uhl, S., Veloso, J., Virius, M., Vondra, J., Wallner, S., Weisrock, T., Wilfert, M., ter Wolbeek, J., Zaremba, K., Zavada, P., Zavertyaev, M., Zemlyanichkina, E., Zhuravlev, N., Ziembicki, M., Zink, A., Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), and Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay
Subjects: Drellâ Yan, Drell-Yan process, Photon, Hadron, parton: distribution function, Drell-Yan, Parton, transverse momentum dependence, 01 natural sciences, COMPASS, SIDIS, High Energy Physics - Experiment, Sivers function, Subatomär fysik, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Compass, Subatomic Physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], dimension: 2, Nuclear Experiment, Drell–Yan, Spin, Azimuthal asymmetries, Sivers, TMDs, media_common, Physics, Quantum chromodynamics, deep inelastic scattering: semi-inclusive reaction, polarized target: transverse, photon, Drell–Yan process, hep-ph, lcsh:QC1-999, Azimuthal asymmetrie, High Energy Physics - Phenomenology, kinematics, Siver, polarized beam: longitudinal, Nucleon, spin: asymmetry, Particle Physics - Experiment, Particle physics, Nuclear and High Energy Physics, angular distribution: asymmetry, media_common.quotation_subject, FOS: Physical sciences, Asymmetry, Nuclear physics, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], DrellâYan, 0103 physical sciences, muon nucleon: deep inelastic scattering, quantum chromodynamics, muon nucleon: scattering, 010306 general physics, Particle Physics - Phenomenology, nucleon: transverse momentum, 010308 nuclear & particles physics, 160 GeV/c, hep-ex, CERN SPS, muon+ p: deep inelastic scattering, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, lcsh:Physics, experimental results
Abstract: Proton transverse-spin azimuthal asymmetries are extracted from the COMPASS 2010 semi-inclusive hadron measurements in deep inelastic muon-nucleon scattering in those four regions of the photon virtuality $Q^2$, which correspond to the four regions of the di-muon mass $\sqrt{Q^2}$ used in the ongoing analysis of the COMPASS Drell-Yan measurements. This allows for a future direct comparison of the nucleon transverse-momentum-dependent parton distribution functions extracted from these two alternative measurements. Various two-dimensional kinematic dependences are presented for the azimuthal asymmetries induced by the Sivers transverse-momentum-dependent parton distribution function. The integrated Sivers asymmetries are found to be positive with an accuracy that appears to be sufficient to test the sign change of the Sivers function predicted by Quantum Chromodynamics., 13 pages, 6 figures
Published: 2017

33. First measurement of the Sivers asymmetry for gluons using SIDIS data

Author: S. V. Donskov, O.Yu. Denisov, M. Pešek, C. Regali, K. Königsmann, Aram Kotzinian, A.S. Nunes, D.V. Peshekhonov, D. Panzieri, Janusz Marzec, T. Grussenmeyer, P.D. Eversheim, R. Beck, A. Kerbizi, M. Wilfert, J. ter Wolbeek, H. Suzuki, C.D.R. Azevedo, A. Maggiora, G.V. Meshcheryakov, Yu. V. Mikhailov, S. Sirtl, C. Adolph, Arseniy Rybnikov, S. Gerassimov, N. Horikawa, F. Giordano, A. Grasso, W.-D. Nowak, F. Tosello, S. Tessaro, F. Tessarotto, Laura Gonzalez Silva, Yu. Kisselev, D. Hahne, J. Nový, R. Salac, M. Ostrick, M. Stolarski, I. Gnesi, Andrew Ivanov, E.R. Bielert, A.G. Olshevsky, F. Krinner, A. Rychter, S.S. Dasgupta, R. Akhunzyanov, Yu.A. Khokhlov, T. Szameitat, R. Longo, G. Nukazuka, P. Kremser, G. D. Alexeev, D.I. Ryabchikov, W. Dünnweber, M. Levillain, C.-Y. Hsieh, S.-U. Chung, E. Seder, M. Krämer, V. Frolov, Soumen Paul, M. V. Zavertyaev, V. Anosov, Franco Bradamante, D. von Harrach, V.N. Kolosov, K. Schönning, F. Thibaud, J. Barth, Celso Augusto Guimarães Santos, M. Ziembicki, T. Sawada, I. J. Choi, E. M. Kabuß, A. Magnon, C. Quintans, M. Tasevsky, Gerhard K. Mallot, E. Mitrofanov, R. Heitz, Miroslav Sulc, I.A. Savin, P. Schiavon, F. H. Heinsius, O.P. Gavrichtchouk, M. Chiosso, Martin Bodlak, L. Sinha, François Herrmann, T. Weisrock, T. Matsuda, A. Zink, Takahiro Iwata, G.V. Khaustov, Fabrice Gautheron, H. Matsuda, V. Tskhay, Alexandr Selyunin, N.S. Rogacheva, K. Kurek, V. Andrieux, Adam Szabelski, M. Meyer, L. Dhara, C. Braun, B. Marianski, M. Grosse Perdekamp, M.G. Alexeev, A.V. Efremov, B. Badelek, S. Uhl, A. Vauth, F. Kunne, Bakur Parsamyan, W. Eyrich, Nour Makke, J. Giarra, W. C. Chang, S. Grabmüller, Michal Dziewiecki, B. Ketzer, M. Roskot, S. Takekawa, Anne-Laure Martin, F. Pereira, A. Antoshkin, S. Platchkov, P. Zavada, H. Schmieden, J.M. Friedrich, W. Meyer, Maria Liz Crespo, J. Pretz, K. Zaremba, M. Slunecka, V.A. Polyakov, S. Huber, V. Jary, V.F. Konstantinov, M. Gorzellik, S. Wallner, S. Ishimoto, Kamil Augsten, E. Zemlyanichkina, H. Fischer, M. Aghasyan, G. Sbrizzai, Johannes Bernhard, Ch. Dreisbach, P. Bordalo, A. Guskov, A. Amoroso, J. Pochodzalla, Yakov Petrovich Kulinich, Andrea Bressan, A. Nagaytsev, N. du Fresne von Hohenesche, F. Balestra, N. I. Zhuravlev, N. Pierre, M. Finger, F. Haas, N. C. R. Makins, K. Bicker, E. Fuchey, R. Birsa, J. Lichtenstadt, C. Riedl, Jan Matousek, M. Quaresma, D. Neyret, Nikolay Anfimov, R. Joosten, S. Dasgupta, J. Vondra, A. Austregesilo, Y.-S. Lian, J.F.C.A. Veloso, K. Kondo, Y. Bedfer, O.M. Kouznetsov, A. Srnka, C. Chatterjee, Z.V. Kroumchtein, V. Duic, W. Augustyniak, S. Ramos, K. Schmidt, P. Sznajder, Andrea Ferrero, Norihiro Doshita, N. d'Hose, D. Steffen, J. Smolik, O. Subrt, A. Lehmann, A. Thiel, Q. Curiel, K. Klimaszewski, Y. Miyachi, A.A. Lednev, Andres Cicuttin, I. Orlov, V.D. Samoylenko, G. Reicherz, S. Dalla Torre, Frank Klein, I. Konorov, A. Sandacz, C. Franco, Jen-Chieh Peng, Markus Ball, Yu. Ivanshin, F. Nerling, G. Hamar, M. Büchele, Mikhail Mikhasenko, M. Faessler, J.H. Koivuniemi, B. Grube, R.P. Kurjata, M. Virius, P. Jörg, S. Levorato, N. Mitrofanov, S. Sarkar, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), COMPASS, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, AstroParticule et Cosmologie ( APC - UMR 7164 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Adolph, C., Aghasyan, M., Akhunzyanov, R., Alexeev, M. G., Alexeev, G. D., Amoroso, A., Andrieux, V., Anfimov, N. V., Anosov, V., Antoshkin, A., Augsten, K., Augustyniak, W., Austregesilo, A., Azevedo, C. D. R., BadeÅ‚ek, B., Balestra, F., Ball, M., Barth, J., Beck, R., Bedfer, Y., Bernhard, J., Bicker, K., Bielert, E. R., Birsa, R., Bodlak, M., Bordalo, P., Bradamante, F., Braun, C., Bressan, A., Bã¼chele, M., Chang, W. -. C., Chatterjee, C., Chiosso, M., Choi, I., Chung, S. -. U., Cicuttin, A., Crespo, M. L., Curiel, Q., Dalla Torre, S., Dasgupta, S. S., Dasgupta, S., Denisov, O. Y. u., Dhara, L., Donskov, S. V., Doshita, N., Dreisbach, C. h., Duic, V., Quintans, C., Dziewiecki, M., Efremov, A., Eversheim, P. D., Eyrich, W., Ramos, S., Ferrero, A., Finger, M., Fischer, H., Franco, C., du Fresne von Hohenesche, N., Friedrich, J. M., Frolov, V., Fuchey, E., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Giarra, J., Giordano, F., Gnesi, I., Gorzellik, M., Grabmã¼ller, S., Grasso, A., Grosse Perdekamp, M., Grube, B., Grussenmeyer, T., Guskov, A., Haas, F., Hahne, D., Hamar, G., von Harrach, D., Heinsius, F. H., Heitz, R., Herrmann, F., Horikawa, N., D'Hose, N., Hsieh, C. -. Y., Huber, S., Ishimoto, S., Ivanov, A., Ivanshin, Y. u., Iwata, T., Jary, V., Joosten, R., Jã¶rg, P., Kabuãÿ, E., Kerbizi, A., Ketzer, B., Khaustov, G. V., Khokhlov, Y. u. A., Kisselev, Y. u., Klein, F., Klimaszewski, K., Koivuniemi, J. H., Kolosov, V. N., Kondo, K., Kã¶nigsmann, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O. M., Krã¤mer, M., Kremser, P., Krinner, F., Kroumchtein, Z. V., Kulinich, Y., Kunne, F., Kurek, K., Kurjata, R. P., Lednev, A. A., Lehmann, A., Levillain, M., Levorato, S., Lian, Y. -. S., Lichtenstadt, J., Longo, R., Maggiora, A., Magnon, A., Makins, N., Makke, N., Mallot, G. K., Marianski, B., Martin, A., Marzec, J., Matouå¡ek, J., Matsuda, H., Matsuda, T., Meshcheryakov, G. V., Meyer, M., Meyer, W., Mikhailov, Y. u. V., Mikhasenko, M., Mitrofanov, E., Mitrofanov, N., Miyachi, Y., Nagaytsev, A., Nerling, F., Neyret, D., Novã½, J., Nowak, W. -. D., Nukazuka, G., Nunes, A. S., Olshevsky, A. G., Orlov, I., Ostrick, M., Panzieri, D., Parsamyan, B., Paul, S., Peng, J. -. C., Pereira, F., Peå¡ek, M., Peshekhonov, D. V., Pierre, N., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Ziembicki, M., Zink, A., Regali, C., Reicherz, G., Riedl, C., Roskot, M., Rogacheva, N. S., Ryabchikov, D. I., Rybnikov, A., Rychter, A., Salac, R., Samoylenko, V. D., Sandacz, A., Santos, C., Sarkar, S., Savin, I. A., Sawada, T., Sbrizzai, G., Schiavon, P., Schmidt, K., Schmieden, H., Schã¶nning, K., Seder, E., Selyunin, A., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Smolik, J., Srnka, A., Steffen, D., Stolarski, M., Subrt, O., Sulc, M., Suzuki, H., Szabelski, A., Szameitat, T., Sznajder, P., Takekawa, S., Tasevsky, M., Tessaro, S., Tessarotto, F., Thibaud, F., Thiel, A., Tosello, F., Tskhay, V., Uhl, S., Vauth, A., Veloso, J., Virius, M., Vondra, J., Wallner, S., Weisrock, T., Wilfert, M., ter Wolbeek, J., Zaremba, K., Zavada, P., Zavertyaev, M., Zemlyanichkina, E., and Zhuravlev, N.
Subjects: hadron: angular distribution, muon+: polarized beam, Nuclear Theory, Parton, muon+ deuteron: deep inelastic scattering, hadron: transverse momentum, transverse momentum dependence, 01 natural sciences, COMPASS, High Energy Physics - Experiment, Subatomär fysik, Sivers function, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), photon gluon: fusion, Subatomic Physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], parton, Nuclear Experiment, media_common, Quantum chromodynamics, Physics, gluon: distribution function, deep inelastic scattering: semi-inclusive reaction, higher-order: 0, polarized target: transverse, hep-ph, Deep inelastic scattering, Gluon, PDF, Sivers, TMD, Nuclear and High Energy Physics, lcsh:QC1-999, High Energy Physics - Phenomenology, Siver, effect: Collins, Nucleon, Compton scattering, numerical calculations: Monte Carlo, spin: asymmetry, Particle Physics - Experiment, Quark, Particle physics, data analysis method, deuteron: polarized target, hadron: asymmetry, angular distribution: asymmetry, neural network, media_common.quotation_subject, polarization: longitudinal, FOS: Physical sciences, Asymmetry, Nuclear physics, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, quantum chromodynamics, 010306 general physics, Particle Physics - Phenomenology, 010308 nuclear & particles physics, hep-ex, 160 GeV/c, High Energy Physics::Phenomenology, nucleon: spin: transverse, CERN SPS, muon+ p: deep inelastic scattering, correlation, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, absorption, lcsh:Physics, Lepton, experimental results
Abstract: The Sivers function describes the correlation between the transverse spin of a nucleon and the transverse motion of its partons. It was extracted from measurements of the azimuthal asymmetry of hadrons produced in semi-inclusive deep inelastic scattering of leptons off transversely polarised nucleon targets, and it turned out to be non-zero for quarks. In this letter the evaluation of the Sivers asymmetry for gluons in the same process is presented. The analysis method is based on a Monte Carlo simulation that includes three hard processes: photon-gluon fusion, QCD Compton scattering and leading-order virtual-photon absorption process. The Sivers asymmetries of the three processes are simultaneously extracted using the LEPTO event generator and a neural network approach. The method is applied to samples of events containing at least two hadrons with large transverse momentum from the COMPASS data taken with a 160 GeV/$c$ muon beam scattered off transversely polarised deuterons and protons. With a significance of more than two standard deviations a negative value is obtained for the gluon Sivers asymmetry. The result of a similar analysis for a Collins-like asymmetry for gluons is consistent with zero., Comment: 18 pages, 8 figures
Published: 2017

34. Direct extraction of the Sivers distributions from spin asymmetries in pion and kaon leptoproduction

Author: Vincenzo Barone, Franco Bradamante, Alan D. Martin, Martin, Anna, Bradamante, Franco, and Barone, Vincenzo
Subjects: Particle physics, Proton, Nuclear Theory, Hadron, FOS: Physical sciences, polarized target, 01 natural sciences, COMPASS, Nuclear physics, Sivers function, High Energy Physics - Phenomenology (hep-ph), Pion, semi-inclusive reaction [deep inelastic scattering], Compass, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Spin-½, Physics, Muon, deep inelastic scattering: semi-inclusive reaction, 010308 nuclear & particles physics, spin asymmetry, Observable, Deep inelastic scattering, polarized targets, High Energy Physics - Phenomenology, High Energy Physics::Experiment
Abstract: We present a point-by-point determination of the Sivers distributions from hadron leptoproduction data. The method, which relies on some simple assumptions, is based on the combined analysis of proton and deuteron observables. We make use of the single-spin asymmetries measured by COMPASS in semi-inclusive deep inelastic scattering of 160 GeV muons on transversely polarized proton and deuteron targets., 5 figures
Published: 2017

35. First measurement of unpolarized semi-inclusive deep-inelastic scattering cross sections from a $^3$He target

Author: Allada, K., Aniol, K., Annand, J.R.M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P.C., Bosted, P., Camsonne, A., Canan, M., Cates, G.D., Chen, C., Chen, J.-P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J.C., Cusanno, F., Dalton, M.M., Deconinck, W., de Jager, C.W., de Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P.A.M., Dutta, C., Dutta, D., El Fassi, L., Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D.W., Holmstrom, T., Huang, J., Huang, M., Ibrahim, H.F., Iodice, M., Jiang, X., Jin, G., Jones, M.K., Katich, J., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., Lerose, J.J., Li, X., Li, Y., Lindgren, R., Liu, T., Liyanage, N., Long, E., Lu, H.-J., Margaziotis, D.J., Markowitz, P., Marrone, S., Mcnulty, D., Meziani, Z.-E., Michaels, R., Moffit, B., Muñoz Camacho, C., Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J.-C., Phillips, S.K., Posik, M., Puckett, A.J.R., Qian, X., Qiang, Y., Rakhman, A., Ransome, R., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M.H., Širca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L.-G., Tobias, W.A., Urciuoli, G.M., Vilardi, I., Wang, K., Wojtsekhowski, B., Wang, Y., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y.-W., Zhao, B., Zhao, Y.X., Zheng, X., Zhu, L., Zhu, X., Zong, X., Laboratoire de Physique de Clermont ( LPC ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Clermont Auvergne ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ), Jefferson Lab Hall A, Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne (UCA)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)
Subjects: +electron+pi%2B%22">electron helium --> electron pi+, HRS, helium: target, cross section: ratio, plane wave, HERMES, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], cross section: angular dependence, COMPASS, Sivers function, quantum chromodynamics, electron: beam, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], +electron+pi%22">electron helium --> electron pi, deep inelastic scattering: semi-inclusive reaction, nucleus, parametrization, showers, model: quark parton, pi+: production, kinematics, differential cross section, quark: valence, higher-dimensional, numerical calculations: Monte Carlo, experimental results, Jefferson Lab
Abstract: International audience; The unpolarized semi-inclusive deep-inelastic scattering (SIDIS) differential cross sections in He3(e,e′π±)X have been measured for the first time in Jefferson Lab experiment E06-010 with a 5.9GeVe− beam on a He3 gas target. The experiment focuses on the valence quark region, covering a kinematic range 0.12
Published: 2017

36. Process dependent Sivers function and implication for single spin asymmetry in inclusive hadron production

Author: Zhong-Bo Kang and Leonard Gamberg
Subjects: Inclusive hadron production, Physics, Nuclear and High Energy Physics, Particle physics, Photon, Process-dependence, media_common.quotation_subject, Hadron, FOS: Physical sciences, Parton, Asymmetry, Sivers function, Nuclear physics, High Energy Physics - Phenomenology, Formalism (philosophy of mathematics), High Energy Physics - Phenomenology (hep-ph), Single transverse spin asymmetry, Physics::Atmospheric and Oceanic Physics, media_common
Abstract: We study the single transverse spin asymmetries in the single inclusive particle production within the framework of the generalized parton model (GPM). By carefully analyzing the initial- and final-state interactions, we include the process-dependence of the Sivers functions into the GPM formalism. The modified GPM formalism has a close connection with the collinear twist-3 approach. Within the new formalism, we make predictions for inclusive $\pi^0$ and direct photon productions at RHIC energies. We find the predictions are opposite to those in the conventional GPM approach., Comment: 12 pages, 5 figures, extended discussion on connection with twist three approach, references added
Published: 2011

37. Light-cone wavefunction representations of the Sivers and the Boer-Mulders distribution functions

Author: Hwang, Dae Sung
Published: 2013
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38. Polarised Drell-Yan measurement in the COMPASS experiment at CERN

Author: Quaresma, Márcia and COMPASS Collaboration
Subjects: Drell-Yan process, CERN Lab, Physics, polarized target, statistical [error], transverse momentum dependence, COMPASS, target [nucleus], Sivers function, beam [muon], deep inelastic scattering, beam [pi], quantum chromodynamics, High Energy Physics::Experiment, parton, structure, Nuclear Experiment, asymmetry
Abstract: Contribution to Proceedings, Proc. of PANIC 2014, 104 - 107; DESY-PROC-2014-02; ISSN 1435-8077
Published: 2014

39. Transverse single-spin asymmetries in $W^{\pm}$ and $Z^{0}$ bosons production in p$+$p collisions at RHIC

Author: Fazio, Salvatore
Subjects: Drell-Yan process, STAR, vector boson, gauge [invariance], Physics, Nuclear Theory, High Energy Physics::Phenomenology, production [boson], Sivers function, quark, transverse, factorization, deep inelastic scattering, quantum chromodynamics, High Energy Physics::Experiment, Nuclear Experiment, asymmetry [spin], Brookhaven RHIC Coll
Abstract: Contribution to Proceedings, Proc. of PANIC 2014, 161 - 164; DESY-PROC-2014-02; ISSN 1435-8077
Published: 2014
Full Text: View/download PDF

40. Nucleon Transverse Structure at COMPASS

Author: Makke, Nour
Subjects: CERN Lab, hep-ex, 2 [twist], Physics, Nuclear Theory, FOS: Physical sciences, hep-ph, transverse momentum, COMPASS, High Energy Physics - Experiment, Sivers function, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), semi-inclusive reaction [deep inelastic scattering], High Energy Physics - Phenomenology (hep-ph), asymmetry [angular distribution], Collins [asymmetry], spin: transverse [nucleon], Nuclear Experiment, Particle Physics - Experiment, target [deuteron], Particle Physics - Phenomenology, experimental results
Abstract: COMPASS is a fixed target experiment at CERN. Part of its physics programme is dedicated to study the transverse spin and the transverse momentum structure of the nucleon using SIDIS. For these measurements, data have been collected using transversely polarised proton and deuteron targets. A selection of recent measurements of azimuthal asymmetries using data collected with transversely polarised protons is presented., Comment: 4 pages, 3 figures, PANIC 2014
Published: 2014
Full Text: View/download PDF

41. Constraining quark angular momentum with the Sivers function

Author: Bacchetta, Alessandro and Radici, Marco
Subjects: angular momentum [quark], Sivers function, Physics, High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Currently, the best way to determine quark total angular momentum requires the knowledge of the generalized parton distribution $E$ in the forward limit. We present the results of a recent work where we assumed a connection between this function and the Sivers transverse-momentum distribution. Using this assumption, we fitted at the same time nucleon anomalous magnetic moments and semi-inclusive single-spin asymmetries. This allowed us to give an estimate of the total angular momentum carried by each quark flavor., Proc. of DIS 2012, 971 - 974; DESY-PROC-2012-02; ISSN 1435-8077
Published: 2013
Full Text: View/download PDF

42. Study of T-odd parton distribution functions in polarised Drell-Yan processes at COMPASS

Author: Takekawa, Stefano, Bradamante, Franco, and Panzieri, Daniele
Subjects: Sivers function, Boer-Mulders function, Polarised Drell-Yan, FIS/04 FISICA NUCLEARE E SUBNUCLEARE, TMD PDF, SCUOLA DI DOTTORATO DI RICERCA IN FISICA, COMPASS, Particle Physics - Experiment
Abstract: 2008/2009 Lo studio di processi di Drell-Yan (DY) polarizzato permette di accedere alle funzioni di distribuzione partoniche dipendenti dal momento intrinseco trasverso (TMD PDF) che sono usate per descrivere la struttura del protone. La proposta di misura di T-odd TMD PDF (funzioni di Sivers e di Boer-Mulders) è in scrittura e verrà presentata all'SPS Committee. Essa illustra l'intezione di usare lo spettrometro dell'esperimento COMPASS al CERN per effettuare questa misura studiando eventi di Drell-Yan polarizzato. Simulazioni di Monte Carlo sono state effettuate e sono riportate le analisi dei dati raccolti durante i test di DY svolti alla fine dei run di COMPASS degli anni 2007, 2008 e 2009. The study of Drell-Yan (DY) processes allows to access to the transverse momentum dependent parton distribution functions (TMD PDF) which are used to describe the structure of the proton. The proposal of measure of T-odd TMD PDF (Sivers and Boer-Mulders functions) has been written and it will be submitted to the SPS Committee. It is about the use of the COMPASS spectrometer at CERN to perform this measure via Drell-Yan processes. Monte Carlo simulations were done and the analysis of the data collected during the DY test at the end of 2007, 2008 and 2009 runs are reported. 1982
Published: 2012

43. Phenomenology of Sivers Effect with TMD Evolution

Author: S. Melis, M. Anselmino, and Mariaelena Boglione
Subjects: Sivers function, Physics, Particle physics, High Energy Physics - Phenomenology, semi-inclusive reaction [deep inelastic scattering], High Energy Physics - Phenomenology (hep-ph), FOS: Physical sciences, distribution function
Abstract: Following the TMD evolution scheme recently proposed for the unpolarized and the Sivers distribution function, we propose a simple strategy to take into account this TMD $Q^2$ dependence in our phenomenological extraction of the Sivers function from SIDIS data. New results are presented and possible future applications are discussed., Proc. of DIS 2012, 975 - 978; DESY-PROC-2012-02; ISSN 1435-8077
Published: 2012

44. Gluon sivers and experimental considerations for TMDs

Author: Burton, Thomas
Subjects: Physics, High Energy Physics::Lattice, Nuclear Theory, High Energy Physics::Phenomenology, FOS: Physical sciences, pair production [D], transverse momentum dependence, High Energy Physics - Experiment, Sivers function, High Energy Physics - Experiment (hep-ex), PYTHIA, deep inelastic scattering [electron p], High Energy Physics::Experiment, 71: 141 GeV-cms [45], Nuclear Experiment, distribution function [gluon], Monte Carlo, colliding beams [electron p]
Abstract: The study and characterisation of transverse-momentum-dependent distribution functions (TMDs) is a major goal of the Electron-Ion Collider (EIC) physics programme. The study of gluon TMDs poses a greater challenge than for quark TMDs in DIS measurements, as gluons do not directly couple to photons. The study of $D$ meson pairs has been proposed to provide access to gluon TMDs, but is demanding due to the rarity of $D$ production. Here, we discuss the feasibility of such a measurement, and touch upon wider issues to be considered when measuring TMDs at the EIC., Proc. of DIS 2012, 377 - 380; DESY-PROC-2012-02; ISSN 1435-8077
Published: 2012

45. One-Hadron transverse target spin asymmetries at COMPASS

Author: Adolph, Christoph and COMPASS Collaboration
Subjects: 160 GeV/c, Physics, transverse [polarized target], polarized beam, CERN SPS, COMPASS, deep inelastic scattering [muon+ nucleon], electroproduction [hadron], Sivers function, asymmetry [angular distribution], Collins [asymmetry], High Energy Physics::Experiment, Nuclear Experiment, asymmetry [spin], experimental results
Abstract: The measurements of single spin asymmetries in semi-inclusive deep inelastic scattering on a transversely polarized target are an important part of the COMPASS physics program. By measuring the spin dependent azimuthal asymmetries in hadron production one can access both transversity - using the Collins fragmentation function - and the Sivers distribution function. The COMPASS collaboration has measured these asymmetries in the scattering of a $160\,\mbox{GeV}/c$ polarized $\mu^+$ beam off a transversely polarized $^6$LiD (deuteron) target in the years 2002--2004 and off a transversely polarized NH$_3$ (proton) target in 2007 and 2010. In this contribution we present the results from the 2010 data for the Collins and Sivers asymmetries., Proc. of DIS 2012, 929 - 932; DESY-PROC-2012-02; ISSN 1435-8077
Published: 2012

46. Single Spin Asymmetry in e+$p^\uparrow \to e+J/\psi$+X

Author: Godbole, R., Misra, A., Mukherjee, A., and Rawoot, V.
Subjects: Sivers function, High Energy Physics - Phenomenology, deep inelastic scattering, High Energy Physics::Phenomenology, Nuclear Theory, evaporation [color], electroproduction, High Energy Physics::Experiment, gluon, Nuclear Experiment, asymmetry [spin]
Abstract: We report on a recent investigation of the single spin asymmetry (SSA) in low virtuality electroproduction of $J/\psi$ in color evaporation model. We show that this can be used as a probe for the still unknown gluon Sivers function., Comment: Prepared for the XX th International Workshop of Deep Inelastic Scattering and Related Areas
Published: 2012

47. Single and double spin asymmetry measurements in semi-inclusive DIS on polarized $\mathrm{^3He}$

Author: Sulkosky, Vincent, Allada, Kalyan, and JLab E06 -010 Collaboration
Subjects: Physics, transverse [polarized target], polarized beam, semi-inclusive reaction, angular dependence, Sivers function, Collins [asymmetry], electroproduction [p], High Energy Physics::Experiment, Nuclear Experiment, inclusive reaction, asymmetry [spin], deep inelastic scattering [electron nucleus], nuclide [helium], experimental results, Jefferson Lab
Abstract: Jefferson Lab experiment E06-010 measured the target-single spin (SSA) and double spin asymmetries (DSA) in semi-inclusive deep inelastic $^{3}\rm He^{\uparrow}(e,e'\pi^{\pm})X$ reactions on a polarized $^3\rm He$ target. The measured asymmetry ($A_{\mathrm{UT}}$) is sensitive to the nucleon ttransversity and Sivers distribution functions, whereas the measured $A_{LT}$ asymmetry is related to the transverse momentum dependent PDF $g_{1T}$. The kinematics were chosen to be in the valence quark region with $x \sim$ 0.16-0.35 and $Q^2 \sim$ \unit{1.4-2.7}{\squaren{(\GeVoverc)}}. The Collins moment, which is sensitive to transversity, the Sivers and $A_{\mathrm{LT}}$ moments, which are sensitive to the orbital motion of the quarks, were extracted using the azimuthal angular dependence of the measured asymmetries. The final semi-inclusive results for the electroproduction of pions are presented and discussed., Proc. of DIS 2012, 963 - 966; DESY-PROC-2012-02; ISSN 1435-8077
Published: 2012

48. Transverse Spin and Classical Gluon Fields: Combining Two Perspectives on Hadronic Structure

Author: Sievert, Matthew D.
Subjects: Physics, Nuclear Physics, Quantum Physics, transverse spin, classical gluon fields, saturation, Sivers function, small-x, single spin asymmetry, transverse spin asymmetry, TMD, STSA, MV model, heavy nucleus, heavy ion, nuclear shadowing, lensing, odderon, QCD, orbital angular momentum
Abstract: In recent decades, the spin and transverse momentum of quarks and gluons were found to play integral roles in the structure of the nucleon. Simultaneously, the onset of gluon saturation in hadrons and nuclei at high energies was predicted to result in a new state of matter dominated by classical gluon fields. Understanding both of these contributions to hadronic structure is essential for current and future collider phenomenology. In this Dissertation, we study the combined effects of transverse spin and gluon saturation using the Glauber-Gribov-Mueller / McLerran-Venugopalan model of a heavy nucleus in the quasi-classical approximation. We investigate the use of a transversely-polarized projectile as a probe of the saturated gluon fields in the nucleus, finding that the transverse spin asymmetry of produced particles couples to the component of the gluon fields which is antisymmetric under both time reversal and charge conjugation. We also analyze the effects of saturation on the transverse spin asymmetry (Sivers function) of quarks within the wave function of the nucleus, finding that gluon saturation preferentially generates the asymmetry through the orbital angular momentum of the nucleons, together with nuclear shadowing.
Published: 2014

49. Measurement of Single Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering Reaction n↑(e, éπ+)X at Jefferson Lab

Author: Allada, Kalyan C.
Subjects: Single-Spin Asymmetries; Helium-3, Neutron, Transversity, Sivers Function, Semi-Inclusive Deep Inelastic Scattering, Other Physical Sciences and Mathematics
Abstract: What constitutes the spin of the nucleon? The answer to this question is still not completely understood. Although we know the longitudinal quark spin content very well, the data on the transverse quark spin content of the nucleon is still very sparse. Semi-inclusive Deep Inelastic Scattering (SIDIS) using transversely polarized targets provide crucial information on this aspect. The data that is currently available was taken with proton and deuteron targets. The E06-010 experiment was performed at Jefferson Lab in Hall-A to measure the single spin asymmetries in the SIDIS reaction n↑(e,éπ±/K±)X using transversely polarized 3He target. The experiment used the continuous electron beam provided by the CEBAF accelerator with a beam energy of 5.9 GeV. Hadrons were detected in a high-resolution spectrometer in coincidence with the scattered electrons detected by the BigBite spectrometer. The kinematic coverage focuses on the valence quark region, x = 0.19 to 0.34, at Q2 = 1.77 to 2.73 (GeV/c)2. This is the first measurement on a neutron target. The data from this experiment, when combined with the world data on the proton and the deuteron, will provide constraints on the transversity and Sivers distribution functions on both the u and d-quarks in the valence region. In this work we report on the single spin asymmetries in the SIDIS n↑(e,éπ+)X reaction.
Published: 2010

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