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Adamczyk, L.; Adkins, J. K.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alekseev, I.; Alford, J.; Aparin, A.; Arkhipkin, D.; Aschenauer, E. C.; Averichev, G. S.; Banerjee, A.; Bellwied, R.; Bhasin, A.; Bhati, A. K.; Bhattarai, P.; Bielčík, J.; Bielčíková, J.; Bland, L. C.; Bordyuzhin, I. G.; Bouchet, J.; Brandin, A. V.; Bunzarov, I.; Burton, T. P.; Butterworth, J.; Caines, H.; Sánchez, M. Calderón De La Barca; Campbell, J. M.; Cebra, D.; Cervantes, M. C.; Chakaberia, I.; Chaloupka, P.; Chang, Z.; Chattopadhyay, S.; Chen, J. H.; Chen, X.; Cheng, J.; Cherney, M.; Christie, W.; Contin, G.; Crawford, H. J.; Das, S.; Silva, L. C. De; Debbe, R.; Dedovich, T. G.; Deng, J.; Derevschikov, A. A.; Ruzza, B. Di; Didenko, L.; Dilks, C.; Dong, X.; Drachenberg, J. L.; Draper, J. E.; Du, C. M.; Dunkelberger, L. E.; Dunlop, J. C.; Efimov, L. G.; Engelage, J.; Eppley, G.; Esha, R.; Evdokimov, O.; Eyser, O.; Fatemi, R.; Fazio, S.; Federic, P.; Fedorišin, J.; Feng, Z.; Filip, P.; Fisyak, Y.; Flores, C.; Fulek, Ł.; Gagliardi, C. A.; Garand, D.; Geurts, F. J. M.; Gibson, A.; Girard, Martin; Greiner, L.; Grosnick, D.; Gunarathne, D. S.; Guo, Y.; Gupta, S.; Gupta, A.; Guryn, W.; Hamad, A. I.; Hamed, A.; Haque, R.; Harris, J. W.; He, L.; Heppelmann, S.; Hirsch, A.; Hoffmann, G. W.; Hofman, D. J.; Horvat, S.; Huang, B.; Huang, X.; Huang, H. Z.; Huck, P.; Humanic, T. J.; Igo, G.; Jacobs, W. W.; Jang, H. J.; Jiang, K.; Judd, E. G.; Kabana, S.; Kalinkin, D.; Kang, K.; Kauder, K.; Ke, H. W.; Keane, D.; Kechechyan, A.; Khan, Z. H.; Kikoła, D. P.; Kisel, I.; Kisiel, A.; Kochenda, L.; Koetke, D. D.; Kollegger, T.; Kosarzewski, L. K.; Kraishan, A. F.; Кравцов, П.; Krueger, K.; Kulakov, I.; Kumar, L.; Kycia, R. A.; Lamont, M. A.C.; Landgraf, J. M.; Landry, K. D.; Lauret, J.; Lebedev, A.; Lednický, R.; Lee, J. H.; Li, X.; Li, C.; Li, W.; Li, Z. M.; Li, Y.; Lisa, M. A.; Liu, F.; Ljubičić, T.; Llope, W. J.; Lomnitz, M.; Longacre, R. S.; Luo, X.; G., Y.; L., G.; Ma, L.; Ma, R.; Magdy, N.; Majka, R.; Manion, A.; Margetis, S.; Markert, C.; Masui, H.; Matis, H. S.; McDonald, D.; Meehan, K.; Minaev, N. G.; Mioduszewski, S.; Mohanty, B.; Mondal, M. M.; Морозов, Д. А.; Mustafa, M. K.; Nandi, B. K.; Nasim, Md.; Nayak, T. K.; Nigmatkulov, G.; Nogach, L. V.; Noh, S. Y.; Novák, J.; Nurushev, S. B.; Odyniec, G.; Ogawa, A.; Oh, K.; Okorokov, V.; Olvitt, D.; Page, B. S.; Pak, R.; Pan, Y. X.; Pandit, Y.; Panebratsev, Y.; Pawlik, B.; Pei, H.; Perkins, C.; Peterson, A.; Pile, P.; Planinić, M.; Pluta, J.; Poljak, N.; Poniatowska, K.; Porter, J.; Posik, M.; Poskanzer, A. M.; Pruthi, N. K.; Putschke, J.; Qiu, H.; Quintero, A.; Ramachandran, S.; Raniwala, R.; Raniwala, S.; Ray, R. L.; Ritter, H. G.; Roberts, J.; Rogachevskiy, O. V.; Romero, J. L.; Roy, A.; Ruan, L.; Rusňák, J.; Rusnakova, O.; Sahoo, N.; Sahu, P. K.; Sakrejda, I.; Salur, S.; Sandweiss, J.; Sarkar, A.; Schambach, J.; Scharenberg, R. P.; Schmah, A.; Schmidke, W. B.; Schmitz, N.; Seger, J.; Seyboth, P.; Shah, N.; Shahaliev, E.; Shanmuganathan, P. V.; Shao, M.; Sharma, M.; Sharma, B.; Shen, W. Q.; Shi, S. S.; Shou, Q.; Sichtermann, E. P.; Sikora, R.; Simko, M.; Skoby, M. J.; Smirnov, D.; Smirnov, N.; Song, L.; Sorensen, P.; Spinka, H.; Srivastava, B.; Stanislaus, T. D. S.; Stepanov, M.; Stock, R.; Strikhanov, M.; Stringfellow, B.; Šumbera, M.; Summa, B.; Sun, X.; Sun, Z. J.; Sun, X. M.; Sun, Y.; Surrow, B.; Svirida, N.; Szelezniak, Michal; Tang, A. H.; Tang, Z.; Tarnowsky, T.; Tawfik, A.; Thomas, J. H.; Timmins, A. R.; Tlusty, D.; Tokarev, M.; Trentalange, S.; Tribble, R. E.; Tribedy, P.; Tripathy, S. K.; Trzeciak, B. A.; Tsai, O. D.; Ullrich, T.; Underwood, D. G.; Upsal, I.; Buren, G. Van; Nieuwenhuizen, G. van; Vandenbroucke, M.; Varma, R.; Vasiliev, A.; Vértesi, R.; Videbæk, F.; Viyogi, Y. P.; Vokál, S.; Voloshin, S. A.; Vossen, A.; Wang, G.; Wang, Y.; Wang, F.; Wang, H.; Wang, J. S.; Webb, J. C.; Webb, G.; Wen, L.; Westfall, G. D.; Wieman, H.; Wissink, S. W.; Witt, R.; Wu, Y. F.; Zhang, Xiao; Xie, W.; Xin, K.; Xu, Q. H.; Xu, Z.; Xu, H. S.; Xu, N.; Xu, Y.; Yang, Qiang; Yang, Yifan; Yang, S.; Yang, C.; Ye, Z.; Yepes, P.; Yi, L.; Yip, K.; Yoo, I. K.; Yu, N.; Zbroszczyk, H.; Zha, W.; Zhang, X. P.; Zhang, J.; Zhang, Y.; Zhang, J. B.; Zhang, S.; Zhang, Z.; Zhao, J.; Chen, Zhong; Zhou, Long; Zhu, X.; Zoulkarneeva, Y.; Zyzak, M.

doi:10.1103/physrevlett.115.242501

Cited by 36 publications

(26 citation statements)

References 53 publications

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“…Finally, it is worth noting that polarized-proton collisions at STAR have also yielded nonzero asymmetries sensitive to transversity through dihadron interference fragmentation functions [79]. These asymmetries persist in the collinear framework of pQCD, where factorization and universality are expected to hold [80].…”

Section: Comparison To Modelsmentioning

confidence: 96%

Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at s=500 GeV

Adamczyk¹,

Adams²,

Adkins³

et al. 2018

Phys. Rev. D

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We report the first measurements of transverse single-spin asymmetries for inclusive jet and jet þ π AE production at midrapidity from transversely polarized proton-proton collisions at ffiffi ffi s p ¼ 500 GeV. The data were collected in 2011 with the STAR detector sampled from 23 pb −1 integrated luminosity with an average beam polarization of 53%. Asymmetries are reported for jets with transverse momenta 6 < p T < 55 GeV=c and pseudorapidity jηj < 1. Presented are measurements of the inclusive-jet azimuthal transverse single-spin asymmetry, sensitive to twist-3 initial-state quark-gluon correlators; the Collins asymmetry, sensitive to quark transversity coupled to the polarized Collins fragmentation function; and the first measurement of the "Collins-like" asymmetry, sensitive to linearly polarized gluons. Within the present statistical precision, inclusive-jet and Collins-like asymmetries are small, with the latter allowing the first experimental constraints on gluon linear polarization in a polarized proton. At higher values of jet transverse momenta, we observe the first nonzero Collins asymmetries in polarized-proton collisions, with a statistical significance of greater than 5σ. The results span a range of x similar to results from semi-inclusive deep-inelastic scattering but at much higher Q 2 . The Collins results enable tests of universality and factorization breaking in the transverse momentum-dependent formulation of perturbative quantum chromodynamics.

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Section: Comparison To Modelsmentioning

confidence: 96%

Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at s=500 GeV

Adamczyk¹,

Adams²,

Adkins³

et al. 2018

Phys. Rev. D

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“…A first measurement of the chiral-odd di-hadron fragmentation function H 1 at Belle has already been reported [11] and it can be used by phenomenology to access the transverse spin structure of the nucleon using results on di-pion correlations from SIDIS and p+p scattering experiments [12,13,14,15]. The function H 1 can be considered the counterpart of the transverse polarization dependent Collins fragmentation function in single hadron production.…”

Section: Introductionmentioning

confidence: 99%

Recent fragmentation function measurements at Belle

Vossen¹

2016

Proceedings of XXIII International Workshop on Deep-Inelastic Scattering — PoS(DIS2015)

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This contribution reviews recent results on fragmentation function related measurements from Belle data. It concentrates on the most recent result of the measurement of azimuthal modulations in the cross-section of di-pion pairs in di-jet production from electron positron annihilation. In particular, Belle recently performed the first measurement of an azimuthal modulation of the cross-section which may arise from the dependence of the di-pion fragmentation function on the helicity of the parent quark. This fragmentation function G ⊥ 1 has not been measured previously and it is of particular interest, because it vanishes if the intrinsic transverse momentum in the fragmentation process is not taken into account. Within uncertainties no significant signal for G ⊥ 1 is observed.

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“…The IFF asymmetries from STAR's 2006 dataset [14] have been compared with model calculations based upon SIDIS and e + e data [21]. The model calculations show agreement with the STAR data in terms of the dihadron mass dependence.…”

Section: Resultsmentioning

confidence: 94%

“…[15,16], while those for the IFF measurements are given in Refs. [14,17,18]. Jets are reconstructed using the "anti-k T " algorithm [19] with a radius of 0.6 for p s = 200 GeV or 0.5 for p s = 500 GeV and utilize energy deposition in the BEMC and EEMC as well as charged-particle momenta from STAR's time projection chamber (TPC) [12].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Illuminating Nucleon Structure Through Polarized Proton-Proton Collisions at STAR

Drachenberg¹

2017

Proceedings of XXV International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2017)

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During the past decade, the experiments of the RHIC spin program have provided critical insight into the spin structure of the nucleon, in particular shedding light on the roles played by gluon and sea-quark helicity. In the forthcoming RHIC run, attention will be devoted to transverse-spin phenomena. Over the last decade, theoretical and experimental engagement of this oft-challenging subject has unlocked tantalizing opportunities for new insight into nucleon structure, e.g. with higher dimensions in partonic momentum space. The STAR experiment continues this exploration through an array of measurements from high-energy polarized-proton collisions. Among these studies are the production of weak bosons, azimuthal distributions of hadrons within jets, dihadron correlations, and particle production at large pseudorapidity. Recent breakthroughs may illuminate further longstanding questions: Do factorization and universality extend to the transverse-momentum-dependent (TMD) picture in proton-proton collisions? How do TMD functions evolve with changing kinematics? Beyond existing probes, future measurements will enable even wider frontiers in understanding QCD and nucleon structure.

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Observation of Transverse Spin-Dependent Azimuthal Correlations of Charged Pion Pairs inp↑+pats=200

Cited by 36 publications

References 53 publications

Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at s=500 GeV

Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at s=500 GeV

Recent fragmentation function measurements at Belle

Illuminating Nucleon Structure Through Polarized Proton-Proton Collisions at STAR

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