A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target

Ageev, E.S.; Alexakhin, V.; Alexandrov, Yu.; Alexeev, G. D.; Alexeev, M.; Amoroso, A.; Badełek, B.; Balestra, F.; Ball, J.; Barth, J.; Baum, G.; Becker, M.; Bedfer, Y.; Berglund, P.; Bernet, C.; Bertini, R.; Bettinelli, M.; Birsa, R.; Bisplinghoff, J.; Bordalo, P.; Bradamante, F.; Bressan, A.; Brona, G.; Burtin, E.; Bussa, M.P.; Bytchkov, V.; Chapiró, A.; Cicuttin, A.; Colantoni, M.; Colavita, A.; Costa, S.; Crespo, M.L.; d’Hose, N.; Torre, S. Dalla; Das, Sudipta; Dasgupta, S.; Masi, R. De; Dedek, N.; Demchenko, D.; Денисов, О.; Dhara, L.; Diaz, V.; Dinkelbach, A.M.; Donskov, S.V.; Dorofeev, V.; Doshita, N.; Duic, V.; Dünnweber, W.; Ефремов, А. В.; Eversheim, P.D.; Eyrich, W.; Faessler, M.; Falaleev, V.; Fauland, P.; Ferrero, A.; Ferrero, L.; Finger, M.; Fischer, H.; Franz, J.; Jm, Friedrich; Frolov, V. V.; Fuchs, U.; Garfagnini, R.; Gautheron, F.; Gavrichtchouk, O.P.; Gerassimov, S.; Geyer, R.; Giorgi, M. A.; Gobbo, B.; Goertz, S.; Gorin, A.; Grajek, O.A.; Grasso, A.; Grube, B.; Guskov, A.; Haas, Florian; Hannappel, J.; Harrach, D. von; Hasegawa, T.; Hedicke, S.; Heinsius, F. H.; Hermann, R.; Heß, C.; Hinterberger, F.; Hodenberg, M. von; Horikawa, N.; Horikawa, S.; Horn, I.; Ilgner, C.; Ioukaev, A.I.; Ishimoto, S.; Ivanchin, I.; Ivanov, О. N.; Iwata, T.; Jahn, R.; Janata, A.; Joosten, R.; Jouravlev, N.I.; Kabuß, E.; Kalinnikov, V. A.; Kang, D.; Ketzer, B.; Khaustov, G.V.; Khokhlov, Yu.A.; Kisselev, Yu.; Клейн, Ф.; Klimaszewski, K.; Koblitz, S.; Koivuniemi, J.H.; Kolosov, V.N.; Komissarov, E.V.; Kondo, K.; Königsmann, K.; Konorov, I.; Константинов, В.Ф.; Korentchenko, A.S.; Korzenev, A.; Kotzinian, A.M.; Koutchinski, N.A.; Kouznetsov, O.; Kowalik, K.; Kramer, Daniel; Kravchuk, N. P.; Krivokhizhin, G.V.; Kroumchtein, Z.V.; Kubart, J.; Kühn, Ralf; Kukhtin, V.; Kunne, F.; Kurek, K.; Ladygin, M.E.; Lamanna, M.; Goff, J. M. Le; Leberig, M.; Lednev, A.A.; Lehmann, A.; Lichtenstadt, J.; Liška, T.; Ludwig, I.; Maggiora, A.; Maggiora, M.; Magnon, A.; Mallot, G.K.; Marchand, Claude; Marroncle, J.; Martin, A.; Marzec, J.; Mašek, L.; Massmann, F.; Matsuda, T.; Matthiä, Daniel; Maximov, A.; Meyer, W.; Mielech, A.; Mikhailov, Yu.V.; Moinester, M. A.; Nagel, T.; Nähle, O.; Nassalski, J.; Neliba, S.; Neyret, D.; Nikolaenko, V.; Nozdrin, A.; Obraztsov, V.; Оlshevsky, А.G.; Ostrick, M.; Padee, A.; Pagano, Paolo; Panebianco, S.; Panzieri, D.; Paul, S.; Peshekhonov, D.V.; Peshekhonov, V. D.; Piragino, G.; Platchkov, S.; Platzer, K.; Pochodzalla, J.; Polák, Jaroslav; Polyakov, V.A.; Pontecorvo, G. B.; Popov, A.; Pretz, J.; Procureur, S.; Quintans, C.; Ramos, S.; Reicherz, G.; Richter, A.; Rondio, E.; Rozhdestvensky, A.M.; Ryabchikov, D.I.; Samoylenko, V.D.; Sandacz, A.; Santos, H.; Sapozhnikov, M. G.; Savin, I.; Schiavon, P.; Schill, C.; Schmitt, L.; Schönmeier, P.; Schröeder, Wolfgang; Seeharsch, D.; Seimetz, M.; Setter, D.; Shevchenko, O.Yu.; Siebert, H. W.; Silva, L.; Sinha, L.; Sissakian, A.; Slunečka, M.; Smirnov, G.I.; Sozzi, F.; Srnka, A.; Stinzing, F.; Stolarski, M.; Sugonyaev, V.P.; Šulc, M.; Sulej, R.; Tchalishev, V.V.; Tessaro, S.; Tessarotto, F.; Teufel, Andreas; Tkatchev, L. G.; Toeda, T.; Trippel, Sebastian; Venugopal, G.; Virius, M.; Vlassov, N.V.; Wagner, Mathias; Webb, Richard; Weise, E.; Weitzel, Q.; Windmolders, R.; Wiślicki, W.; Zanetti, A.; Заремба, К.; Zavertyaev, M.; Zhao, J.; Ziegler, Robert; Zvyagin, A.

doi:10.1016/j.nuclphysb.2006.10.027

Cited by 231 publications

(131 citation statements)

References 79 publications

Supporting

Mentioning

127

Contrasting

Order By: Relevance

“…, it is sufficient to apply the lowest-order results (14) and (15) of the correlator. However, to obtain nonzero results for the T-odd distributions…”

Section: Calculation Of Twist-3 Tmd Distributions In Spectator-dimentioning

confidence: 99%

“…A remarkable feature of the above mentioned asymmetries is that they appears at leading twist, thereby those effects should not be unsuppressed at high energies. Indeed significant asymmetries were measured by the HERMES Collaboration [10][11][12], the COMPASS Collaboration [13][14][15][16][17][18] and Jefferson Lab (JLab) Hall A Collaboration [19,20]. The corresponding data have been utilized to extract [21][22][23][24] the Sivers function and transversity distribution, within the TMD factorization [25].…”

Section: Introductionmentioning

confidence: 99%

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Transverse single-spin asymmetries of pion production in semi-inclusive DIS at subleading twist

Mao

Lü

2014

Phys. Rev. D

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We study the single-spin asymmetries with the sin φS and sin(2φ h − φS) angular dependences for charged and neutral pions produced in semi-inclusive deep inelastic scattering on the transversely polarized proton target. The theoretical interpretations of the two asymmetries are presented in terms of the convolution of the twist-3 quark transverse momentum dependent distributions and twist-2 fragmentation functions. Specifically, we investigate the role of the distributions fT , hT and h ⊥ T in the sin φS asymmetry, as well as the role of the distributions f ⊥ T , hT and h ⊥ T in the sin(2φ h −φS) asymmetry. We calculate these distributions in a spectator-diquark model and predict the corresponding asymmetries for the first time, considering the kinematics at HERMES, JLab and COMPASS. The numerical estimates show that the asymmetries are sizable, and the dominant contribution to the sin φS asymmetry comes from the T-odd distribution fT , while f ⊥ T gives the main contribution to the sin(2φ h − φS) asymmetry. The future measurements on these asymmetries can shed light on the information of twist-3 transverse momentum dependent distributions.

show abstract

“…, it is sufficient to apply the lowest-order results (14) and (15) of the correlator. However, to obtain nonzero results for the T-odd distributions…”

Section: Calculation Of Twist-3 Tmd Distributions In Spectator-dimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transverse single-spin asymmetries of pion production in semi-inclusive DIS at subleading twist

Mao

Lü

2014

Phys. Rev. D

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“…In those data no size-able Collins asymmetry was observed within the accuracy of the measurements [10][11][12], a fact that was understood in terms of a cancellation between the u-and d-quark contributions [11]. The COMPASS data are still today the only SIDIS data ever taken on a transversely polarised deuteron target and provide constraints on the d-quark contribution 1 .…”

mentioning

confidence: 99%

“…The principle of the measurements and the data analysis were already described in refs. [10][11][12]20]. In 2010, the spectrometer configuration was very similar to that used in 2007 [20].…”

mentioning

confidence: 99%

I – Experimental investigation of transverse spin asymmetries in μ-p SIDIS processes: Collins asymmetries

Adolph¹,

Alekseev²,

Alexakhin³

et al. 2012

Physics Letters B

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119

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The COMPASS Collaboration at CERN has measured the transverse spin azimuthal asymmetry of charged hadrons produced in semi-inclusive deep inelastic scattering using a 160 GeV µ + beam and a transversely polarised NH 3 target. The Collins asymmetry of the proton was extracted in the Bjorken x range 0.003 < x < 0.7. These new measurements confirm with higher accuracy previous measurements from the COMPASS and HERMES collaborations, which exhibit a definite effect in the valence quark region. The asymmetries for negative and positive hadrons are similar in magnitude and opposite in sign. They are compatible with model calculations in which the u-quark transversity is opposite in sign and somewhat larger than the d-quark transversity distribution function. The asymmetry is extracted as a function of Bjorken x, the relative hadron energy z and the hadron transverse momentum p h T . The high statistics and quality of the data also allow for more detailed investigations of the dependence on the kinematic variables. These studies confirm the leading-twist nature of the Collins asymmetry.

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“…This hypothesis is consistent with the recent measurements of azimuthal asymmetries sensitive to the Collins function performed at the BELLE [4] and BABAR [5] experiments. A global analysis of the Collins amplitudes for pions measured at HERMES, together with the analogous results from the COMPASS experiment obtained using a transversely polarized deuteron target [6] and the azimuthal asymmetries measured in e + e − collisions from BELLE yielded the first extraction of the transversity function for u ad d quarks. The extracted transversity function appears to have opposite sign for u and d flavours and to be substantially smaller than the corresponding positivity bounds [7].…”

Section: Pos(cd15)039mentioning

confidence: 96%

Hermes results on 3D imaging of the nucleon

Pappalardo

2016

Proceedings of the 8th International Workshop on Chiral Dynamics — PoS(CD15)

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The study of the quantum phase-space distribution of quarks and gluons inside nucleons in terms of TMDs and GPDs has become, in the last decade, a cutting-edge research field in hadron physics. These non-perturbative objects, respectively measurable in semi-inclusive deep-inelastic scattering and hard exclusive processes, allow to obtain 3-dimensional representations of the nucleon in the momentum and spatial coordinates as well as indirect insights into the still unknown parton orbital angular momentum. The HERMES experiment at HERA has been a precursor in this field. A selection of HERMES results sensitive to both TMDs and GPDs is presented.

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A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target

Cited by 231 publications

References 79 publications

Transverse single-spin asymmetries of pion production in semi-inclusive DIS at subleading twist

Transverse single-spin asymmetries of pion production in semi-inclusive DIS at subleading twist

I – Experimental investigation of transverse spin asymmetries in μ-p SIDIS processes: Collins asymmetries

Hermes results on 3D imaging of the nucleon

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