Transverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaons

Airapetian, A.; Акопов, Н.; Akopov, Z.; Aschenauer, E. C.; Augustyniak, W.; Avakian, R.; Avetissian, A.; Avetisyan, E.; Belostotski, S.; Bianchi, N.; Blok, H.P.; Borissov, A.; Bowles, J.; Bryzgalov, V.; Burns, J.; Capiluppi, M.; Capitani, G. P.; Cisbani, E.; Ciullo, G.; Contalbrigo, M.; Dalpiaz, P.; Deconinck, W.; Лео, Р. Де; Nardo, L. De; Sanctis, E. De; Diefenthaler, M.; Nezza, P. Di; Düren, M.; Ehrenfried, M.; Elbakian, G.; Ellinghaus, F.; Fabbri, R.; Fantoni, A.; Felawka, L.; Frullani, S.; Gabbert, D.; Gapienko, G.; Гапиенко, В. А.; Gavrilov, G.; Gharibyan, V.; Giordano, F.; Gliske, S.; Golembiovskaya, M.; Hadjidakis, C.; Hartig, M.; Hasch, D.; Hillenbrand, A.; Hoek, M.; Holler, Y.; Hristova, I.; Ivanilov, A.; Jackson, H. E.; Joosten, S.; Kaiser, R.; Karyan, G.; Keri, T.; Kinney, E.; Kisselev, A.; Коротков, В. А.; Kozlov, V.; Kravchenko, P.; Krivokhijine, V. G.; Lagamba, L.; Lapikás, L.; Lehmann, I.; Lenisa, P.; Ruiz, A.; Lorenzon, W.; Ma, Bo-Qiang; Mahon, D.; Makins, N.; Manaenkov, S. I.; Mao, Y.; Mariański, B.; Ossa, A. Martínez de la; Marukyan, H.; Miller, C. A.; Miyachi, Y.; Movsisyan, A.; Murray, M.; Mussgiller, A.; Nappi, E.; Naryshkin, Y.; Negodaev, M.; Nowak, W.-D.; Pappalardo, L. L.; Pérez-Benito, R.; Petrosyan, A.; Raithel, Martin; Reimer, P. E.; Reolon, A. R.; Riedl, C.; Rith, Klaus; Rosner, G.; Rostomyan, A.; Rubin, J.; Ryckbosch, D.; Salomatin, Y.; Sanftl, F.; Schäfer, Andreas; Schnell, G.; Seitz, B.; Shibata, T. A.; Shutov, V.; Stancari, M.; Statera, M.; Steffens, E.; Steijger, J. J. M.; Stewart, J.; Stinzing, F.; Taroian, S.; Terkulov, A.; Truty, R.; Trzciński, A.; Tytgat, M.; Haarlem, Y. Van; Hulse, C. Van; Veretennikov, D.; Vikhrov, V.; Vilardi, I.; Wang, S.; Yaschenko, S.; Ye, Z.; Yen, S.; Yu, W.; Zagrebelnyy, V.; Zeiler, D.; Zihlmann, B.; Żuprański, P.

doi:10.1016/j.physletb.2013.11.021

Cited by 51 publications

(58 citation statements)

References 68 publications

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“…We will proceed with a re-evaluation of four transverse spin observables in the inclusive hadron production process in lepton-nucleon scattering N → h X, using now the general form of the lightcone vectors n µ and m µ in (59). We emphasize that leaving the coefficients χ, η, χ , η unconstrained corresponds to a calculation for an arbitrary reference frame.…”

Section: ⊥(1)mentioning

confidence: 99%

Operator constraints for twist-3 functions and Lorentz invariance properties of twist-3 observables

et al. 2016

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We investigate the behavior under Lorentz tranformations of perturbative coefficient functions in a collinear twist-3 formalism relevant for high-energy observables including transverse polarization of hadrons. We argue that those perturbative coefficient functions can, a priori, acquire quite different yet Lorentz-invariant forms in various frames. This somewhat surprising difference can be traced back to a general dependence of the perturbative coefficient functions on lightcone vectors which are introduced by the twist-3 factorization formulae and which are frame-dependent. One can remove this spurious frame dependence by invoking so-called Lorentz invariance relations (LIRs) between twist-3 parton correlation functions. Some of those relations for twist-3 distribution functions were discussed in the literature before. In this paper we derive the corresponding LIRs for twist-3 fragmentation functions. We explicitly demonstrate that these LIRs remove the lightcone vector dependence by considering transverse spin observables in the single-inclusive production of hadrons in leptonnucleon collisions, N → hX. With the LIRs in hand, we also show that twist-3 observables in general can be written solely in terms of three-parton correlation functions.

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Section: ⊥(1)mentioning

confidence: 99%

Operator constraints for twist-3 functions and Lorentz invariance properties of twist-3 observables

et al. 2016

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“…In addition, data on TSSAs for single-inclusive hadron production from lepton-nucleon collisions is currently available from JLab [41] and HERMES. 42 This reaction was also recently analyzed in [43] using the collinear twist-3 approach and in [44] within the TMD framework. The main question then becomes if one can find a formalism that can consistently describe TSSAs in all of these processes.…”

Section: Discussionmentioning

confidence: 85%

Transverse Single-Spin Asymmetries in Proton-Proton Collisions Within Collinear Factorization

Pitonyak

Kanazawa

Koike

et al. 2015

Int. J. Mod. Phys. Conf. Ser.

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We provide a new analysis within collinear factorization of transverse single-spin asymmetries (TSSAs) in high transverse momentum charged and neutral pion production in pp collisions at the Relativistic Heavy Ion Collider (RHIC). This study incorporates the so-called twist-3 fragmentation term and shows that one can describe RHIC data through this mechanism. Moreover, by fixing other non-perturbative inputs through extractions of transverse momentum dependent functions in e + e − → h 1 h 2 X and semi-inclusive deep-inelastic scattering (SIDIS), we provide for the first time a consistency between certain spin/azimuthal asymmetries in all three reactions (i.e., pp, e + e − , and SIDIS).

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“…The spin community must continue to work towards an explanation of TSSAs both on the experimental and theoretical/phenomenological sides. For example, one can look at A π N in lepton-nucleon collisions at HERMES, JLab, COMPASS, and a future Electron-Ion Collider [56,57,58,59] or in high luminosity proton-proton collisions at the proposed AFTER@LHC experiment [60,61].…”

Section: Pos(qcdev2015)011mentioning

confidence: 99%

A_N in Single-Inclusive Particle Production from Proton-Proton Collisions

Pitonyak¹,

Koike²,

Kanazawa³

et al. 2016

Proceedings of QCD Evolution 2015 — PoS(QCDEV2015)

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We analyze the cause of transverse single-spin asymmetries (TSSAs) in pion and direct photon production from proton-proton (pp) collisions. Two main approaches are used to describe these observables: collinear twist-3 (CT3) factorization and the Generalized Parton Model (GPM). We argue that within the CT3 framework, the fragmentation term can describe very well TSSAs in high transverse momentum charged and neutral pion production in pp collisions at the Relativistic Heavy Ion Collider (RHIC). In addition, TSSAs in direct photon production can be a rich source of information; namely, one can cleanly access the Qiu-Sterman function, test the process dependence of the Sivers function, and distinguish between the CT3 and GPM formalisms.

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Transverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaons

Cited by 51 publications

References 68 publications

Operator constraints for twist-3 functions and Lorentz invariance properties of twist-3 observables

Operator constraints for twist-3 functions and Lorentz invariance properties of twist-3 observables

Transverse Single-Spin Asymmetries in Proton-Proton Collisions Within Collinear Factorization

A_N in Single-Inclusive Particle Production from Proton-Proton Collisions

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