Azimuthal distributions of charged hadrons, pions, and kaons produced in deep-inelastic scattering off unpolarized protons and deuterons

Airapetian, A.; Акопов, Н.; Akopov, Z.; Aschenauer, E. C.; Augustyniak, W.; Avakian, R.; Avetissian, A.; Avetisyan, E.; Belostotski, S.; Blok, H. P.; Borissov, A.; Bowles, J.; Bryzgalov, V.; Burns, J.; Capiluppi, M.; 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.; Elbakian, G.; Ellinghaus, F.; Fantoni, A.; Felawka, L.; Frullani, S.; Gapienko, G.; Гапиенко, В. А.; Garibaldi, F.; Gavrilov, G.; Gharibyan, V.; Giordano, F.; Gliske, S.; Golembiovskaya, M.; Hadjidakis, C.; Hartig, M.; Hasch, D.; Hillenbrand, A.; Hoek, M.; Holler, Y.; Hristova, I.; Imazu, Y.; Ivanilov, A.; Jackson, H. E.; Jo, H. S.; 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.; Q., B.; Mahon, D.; Makins, N.; Manaenkov, S. I.; Manfré, L.; Mao, Y.; Mariański, B.; Ossa, A. Martínez de la; Marukyan, H.; Miller, C. A.; Miyachi, Y.; Movsisyan, A.; Murray, M.; Nappi, E.; Naryshkin, Y.; Nass, A.; 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.; Schüler, K. P.; Seitz, B.; Shibata, T. A.; Stancari, M.; Statera, M.; Steijger, J. J. M.; Stewart, J.; Stinzing, F.; Terkulov, A.; Truty, R.; Trzciński, A.; Tytgat, M.; Vandenbroucke, A.; 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:10.1103/physrevd.87.012010

Cited by 72 publications

(66 citation statements)

References 87 publications

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“…Here, we will just briefly summarize the main data available and then try to sort out the available TMD parameterizations. For SIDIS, measurements have been made by the HERMES Collaboration [66][67][68][69][70] at DESY, the COM-PASS Collaboration [71][72][73][74][75][76][77][78] at CERN, CLAS [79,80], and the Hall A Collaboration [81][82][83][84] at Jefferson Laboratory (JLab). We list these SIDIS experiments in Table 5 and briefly summarize the results as follows.…”

Section: Available Data and Parameterizationsmentioning

confidence: 99%

Three-dimensional imaging of the nucleon and semi-inclusive high-energy reactions

2015

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We present a short overview of studies of the transverse-momentum-dependent parton distribution functions of the nucleon. The aim of such studies is to provide three-dimensional imaging of the nucleon and a comprehensive description of semi-inclusive high-energy reactions. By summarizing what we have done in constructing the theoretical framework for inclusive deep inelastic lepton-nucleon scattering and one-dimensional imaging of the nucleon, we try to sketch out an outline of what we need to do to construct such a comprehensive theoretical framework for semi-inclusive processes in terms of three-dimensional gauge-invariant parton distributions. Next, we present an overview of what we have already achieved, with an emphasis on the theoretical framework for semi-inclusive reactions in leading-order perturbative quantum chromodynamics but with leading and higher twist contributions. We summarize in particular the results for the differential cross section and azimuthal spin asymmetries in terms of the gauge-invariant transverse-momentum-dependent parton distribution functions. We also briefly summarize the available experimental results on semi-inclusive reactions and the parameterizations of transverse-momentum-dependent parton distributions extracted from them and present an outlook for future studies.

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Section: Available Data and Parameterizationsmentioning

confidence: 99%

Three-dimensional imaging of the nucleon and semi-inclusive high-energy reactions

2015

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“…The Collins effect has been observed in semi-inclusive deep inelastic scattering experiments (SIDIS) where it arises from the product of a Collins FF and a chiral-odd transversity parton distribution function (PDF) [2,3,4,5]. Extraction of the Collins FF and the transversity PDF requires an independent measurement.…”

Section: Introductionmentioning

confidence: 99%

Collins fragmentation function measurements at BABAR

Brown¹

2016

AIP Conference Proceedings

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Abstract. We present the results of the measurement of Collins asymmetries in electron-positron annihilation events with the BABAR detector in the process e + e − → h 1 h 2 X, for charged hadrons where h 1 h 2 = KK, Kπ, or ππ. Using 468 fb −1 of data collected by BABAR at the SLAC PEP-II B factory, we observe distinct azimuthal asymmetries for hadrons in opposite thrust hemispheres of events, with the asymmetries increasing in proportion to the hadron energies. We find Kπ asymmetries similar to those for ππ pairs, with the high-energy KK asymmetries generally larger.

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“…However, each of the above processes can produce Fig. 11 cos 2φ amplitudes for positive (upper panels) and negative (lower panels) pions measured by the HERMES Collaboration [112]. Closed and open squares are for amplitudes extracted from hydrogen and deuterium targets, respectively.…”

Section: Origins Of the Cos 2φ Asymmetry In Sidismentioning

confidence: 99%

“…The first measurement of the cos 2φ asymmetry was performed by the EMC Collaboration at the energy The cos 2φ asymmetry of π + production in electroproduction on the proton was also searched by CLAS [113]. Several years ago, for the first time, the cos 2φ asymmetries in a four-dimensional kinematic space (x, y, z, and P T ) for positively and negatively charged pions and kaons separately, as well as for unidentified hadrons, were measured by the HER-MES Collaboration [112], with 27.6 GeV electrons and positrons scattered off unpolarized hydrogen and deuterium targets. An example of the HERMES measurement is given in Fig.…”

Section: The Cos 2φ Asymmetry In Unpolarized Semi-inclusive Dismentioning

confidence: 99%

“…The HERMES and COMPASS Collaborations have recently performed measurements on SIDIS to provide multidimensional data in bins of x B , z h , Q 2 , and P T for the azimuthal asymmetries [112,114], which allows the extraction of the quark Boer-Mulders functions in a more comprehensive way. Particularly, it is possible to carry out the analysis up to an order of O(1/Q).…”

Section: Parameterization In Ref [131]mentioning

confidence: 99%

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Spin physics through unpolarized processes

Lü

2016

Front. Phys.

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This article presents a review of our present understanding of the spin structure of the unpolarized hadron. Particular attention is paid to the quark sector at leading twist, namely, the quark Boer-Mulders function, which describes the transverse polarization of the quark inside an unpolarized hadron. After introducing the operator definition of the Boer-Mulders function, a detailed treatment of different non-perturbative calculations of the Boer-Mulders functions is provided. The phenomenology in Drell-Yan processes and semi-inclusive leptoproduction, including the extraction of the quark and antiquark Boer-Mulders functions from experimental data, is presented comprehensively. Finally, prospects for future theoretical studies and experimental measurements are presented in brief.

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Azimuthal distributions of charged hadrons, pions, and kaons produced in deep-inelastic scattering off unpolarized protons and deuterons

Cited by 72 publications

References 87 publications

Three-dimensional imaging of the nucleon and semi-inclusive high-energy reactions

Three-dimensional imaging of the nucleon and semi-inclusive high-energy reactions

Collins fragmentation function measurements at BABAR

Spin physics through unpolarized processes

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