Related papers: Transverse-Spin and Transverse-Momentum Effects in…

Transverse spin effects and light-quark dipole moments at colliders

In this talk, we present novel methods to investigate light-quark dipole interactions at colliders. Our approach includes: (1) measuring azimuthal asymmetries of a collinear dihadron in semi-inclusive deep inelastic lepton scattering off an…

High Energy Physics - Phenomenology · Physics 2026-03-20 Xin-Kai Wen , Bin Yan , Zhite Yu , C. -P. Yuan

Transversity K Factors for Drell-Yan

The question of the K factor in transversely polarised Drell-Yan (DY) processes is examined. The transverse-spin case is peculiar for the absence of a reference point in deeply inelastic scattering (DIS). Therefore, in order to study more…

High Energy Physics - Phenomenology · Physics 2011-09-13 Philip G. Ratcliffe

Transverse Spin Structure of the Nucleon from COMPASS

The measurement of transverse spin effects in semi-inclusive deep-inelastic scattering is an important part of the COMPASS physics program. In the years 2002-2004 data were taken by scattering a 160 GeV muon beam on a transversely polarized…

High Energy Physics - Experiment · Physics 2019-08-13 C. Schill

Transverse spin azimuthal asymmetries in SIDIS at COMPASS: Multidimensional analysis

One of the important objectives of the COMPASS experiment (CERN, SPS north area) is the exploration of transverse spin structure of nucleon via study of spin (in)dependent azimuthal asymmetries with semi-inclusive deep inelastic scattering…

High Energy Physics - Experiment · Physics 2016-03-23 Bakur Parsamyan

Sivers asymmetry extracted in SIDIS at the hard scale of the Drell-Yan process at COMPASS

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…

High Energy Physics - Experiment · Physics 2017-07-18 C. Adolph , M. Aghasyan , R. Akhunzyanov , M. G. Alexeev , G. D. Alexeev , A. Amoroso , V. Andrieux , N. V. Anfimov , V. Anosov , K. Augsten , W. Augustyniak , A. Austregesilo , C. D. R. Azevedo , B. Badelek , F. Balestra , M. Ball , J. Barth , R. Beck , Y. Bedfer , J. Bernhard , K. Bicker , E. R. Bielert , R. Birsa , M. Bodlak , P. Bordalo , F. Bradamante , C. Braun , A. Bressan , M. Buechele , W. -C. Chang , C. Chatterjee , M. Chiosso , I. Choi , S. -U. Chung , A. Cicuttin , M. L. Crespo , Q. Curiel , S. Dalla Torre , S. S. Dasgupta , S. Dasgupta , O. Yu. Denisov , L. Dhara , S. V. Donskov , N. Doshita , Ch. Dreisbach , V. Duic , W. Duennweber , M. Dziewiecki , A. Efremov , C. Elia , P. D. Eversheim , W. Eyrich , M. Faessler , A. Ferrero , M. Finger , M. Finger , H. Fischer , C. Franco , N. du Fresne von Hohenesche , J. M. Friedrich , V. Frolov , E. Fuchey , F. Gautheron , O. P. Gavrichtchouk , S. Gerassimov , J. Giarra , F. Giordano , I. Gnesi , M. Gorzellik , S. Grabmueller , A. Grasso , M. Grosse Perdekamp , B. Grube , T. Grussenmeyer , A. Guskov , F. Haas , D. Hahne , G. Hamar , D. von Harrach , F. H. Heinsius , R. Heitz , F. Herrmann , N. Horikawa , N. d'Hose , C. -Y. Hsieh , S. Huber , S. Ishimoto , A. Ivanov , Yu. Ivanshin , T. Iwata , V. Jary , R. Joosten , P. Joerg , E. Kabuss , B. Ketzer , G. V. Khaustov , Yu. A. Khokhlov , Yu. Kisselev , F. Klein , K. Klimaszewski , J. H. Koivuniemi , V. N. Kolosov , K. Kondo , K. Koenigsmann , I. Konorov , V. F. Konstantinov , A. M. Kotzinian , O. M. Kouznetsov , M. Kraemer , P. Kremser , F. Krinner , Z. V. Kroumchtein , Y. Kulinich , F. Kunne , K. Kurek , R. P. Kurjata , A. A. Lednev , A. Lehmann , M. Levillain , S. Levorato , Y. -S. Lian , J. Lichtenstadt , R. Longo , A. Maggiora , A. Magnon , N. Makins , N. Makke , G. K. Mallot , B. Marianski , A. Martin , J. Marzec , J. Matousek , H. Matsuda , T. Matsuda , G. V. Meshcheryakov , M. Meyer , W. Meyer , Yu. V. Mikhailov , M. Mikhasenko , E. Mitrofanov , N. Mitrofanov , Y. Miyachi , A. Nagaytsev , F. Nerling , D. Neyret , J. Novy , W. -D. Nowak , G. Nukazuka , A. S. Nunes , A. G. Olshevsky , I. Orlov , M. Ostrick , D. Panzieri , B. Parsamyan , S. Paul , J. -C. Peng , F. Pereira , M. Pesek , D. V. Peshekhonov , N. Pierre , S. Platchkov , J. Pochodzalla , V. A. Polyakov , J. Pretz , M. Quaresma , C. Quintans , S. Ramos , C. Regali , G. Reicherz , C. Riedl , M. Roskot , N. S. Rossiyskaya , D. I. Ryabchikov , A. Rybnikov , A. Rychter , R. Salac , V. D. Samoylenko , A. Sandacz , C. Santos , S. Sarkar , I. A. Savin , T. Sawada , G. Sbrizzai , P. Schiavon , K. Schmidt , H. Schmieden , K. Schoenning , E. Seder , A. Selyunin , L. Silva , L. Sinha , S. Sirtl , M. Slunecka , J. Smolik , F. Sozzi , A. Srnka , D. Steffen , M. Stolarski , O. Subrt , M. Sulc , H. Suzuki , A. Szabelski , T. Szameitat , P. Sznajder , S. Takekawa , M. Tasevsky , S. Tessaro , F. Tessarotto , F. Thibaud , A. Thiel , F. Tosello , V. Tskhay , S. Uhl , J. Veloso , M. Virius , J. Vondra , S. Wallner , T. Weisrock , M. Wilfert , J. ter Wolbeek , K. Zaremba , P. Zavada , M. Zavertyaev , E. Zemlyanichkina , N. Zhuravlev , M. Ziembicki , A. Zink

Single Spin Asymmetries in Semi-Inclusive Electroproduction: Access to Transversity

We discuss the quark transversity distribution function and a possible way to access it through the measurement of single spin azimuthal asymmetry in semi-inclusive single pion electroproduction on a transversely polarized target.

High Energy Physics - Phenomenology · Physics 2016-09-06 K. A. Oganessyan , N. Bianchi , E. De Sanctis , W. -D. Nowak

Studying the Underlying Event in Drell-Yan and High Transverse Momentum Jet Production at the Tevatron

We study the underlying event in proton-antiproton collisions by examining the behavior of charged particles (transverse momentum pT > 0.5 GeV/c, pseudorapidity |\eta| < 1) produced in association with large transverse momentum jets (~2.2…

High Energy Physics - Experiment · Physics 2012-04-20 The CDF Collaboration , T. Aaltonen , J. Adelman , B. Alvarez Gonzalez , S. Amerio , D. Amidei , A. Anastassov , A. Annovi , J. Antos , G. Apollinari , A. Apresyan , T. Arisawa , A. Artikov , J. Asaadi , W. Ashmanskas , A. Attal , A. Aurisano , F. Azfar , W. Badgett , A. Barbaro-Galtieri , V. E. Barnes , B. A. Barnett , P. Barria , P. Bartos , G. Bauer , P. -H. Beauchemin , F. Bedeschi , D. Beecher , S. Behari , G. Bellettini , J. Bellinger , D. Benjamin , A. Beretvas , D. Berge , A. Bhatti , M. Binkley , D. Bisello , I. Bizjak , R. E. Blair , C. Blocker , B. Blumenfeld , A. Bocci , A. Bodek , V. Boisvert , D. Bortoletto , J. Boudreau , A. Boveia , B. Brau , A. Bridgeman , L. Brigliadori , C. Bromberg , E. Brubaker , J. Budagov , H. S. Budd , S. Budd , K. Burkett , G. Busetto , P. Bussey , A. Buzatu , K. L. Byrum , S. Cabrera , C. Calancha , S. Camarda , M. Campanelli , M. Campbell , F. Canelli , A. Canepa , B. Carls , D. Carlsmith , R. Carosi , S. Carrillon , S. Carron , B. Casal , M. Casarsa , A. Castrocc , P. Catastini , D. Cauz , V. Cavaliere , M. Cavalli-Sforza , A. Cerri , L. Cerrito , S. H. Chang , Y. C. Chen , M. Chertok , G. Chiarelli , G. Chlachidze , F. Chlebana , K. Cho , D. Chokheli , J. P. Chou , K. Chungo , W. H. Chung , Y. S. Chung , T. Chwalek , C. I. Ciobanu , M. A. Ciocci , A. Clark , D. Clark , G. Compostella , M. E. Convery , J. Conway , M. Corbo , M. Cordelli , C. A. Cox , D. J. Cox , F. Crescioli , C. Cuenca Almenar , J. Cuevas , R. Culbertson , J. C. Cully , D. Dagenhart , M. Datta , T. Davies , P. de Barbaro , S. De Cecco , A. Deisher , G. De Lorenzo , M. Dell'Orso , C. Deluca , L. Demortier , J. Deng , M. Deninno , M. d'Errico , A. Di Canto , G. P. di Giovanni , B. Di Ruzza , J. R. Dittmann , M. D'Onofrio , S. Donati , P. Dong , T. Dorigo , S. Dube , K. Ebina , A. Elagin , R. Erbacher , D. Errede , S. Errede , N. Ershaidat , R. Eusebi , H. C. Fang , S. Farrington , W. T. Fedorko , R. G. Feild , M. Feindt , J. P. Fernandez , C. Ferrazza , R. Field , G. Flanagans , R. Forrest , M. J. Frank , M. Franklin , J. C. Freeman , I. Furic , M. Gallinaro , J. Galyardt , F. Garberson , J. E. Garcia , A. F. Garfinkel , P. Garosi , H. Gerberich , D. Gerdes , A. Gessler , S. Giagu , V. Giakoumopoulou , P. Giannetti , K. Gibson , J. L. Gimmell , C. M. Ginsburg , N. Giokaris , M. Giordani , P. Giromini , M. Giunta , G. Giurgiu , V. Glagolev , D. Glenzinski , M. Gold , N. Goldschmidt , A. Golossanov , G. Gomez , G. Gomez-Ceballos , M. Goncharov , O. González , I. Gorelov , A. T. Goshaw , K. Goulianos , A. Gresele , S. Grinstein , C. Grosso-Pilcher , R. C. Group , U. Grundler , J. Guimaraes da Costa , Z. Gunay-Unalan , C. Haber , S. R. Hahn , E. Halkiadakis , B. -Y. Han , J. Y. Han , F. Happacher , K. Hara , D. Hare , M. Hare , R. F. Harr , M. Hartz , K. Hatakeyama , C. Hays , M. Heck , J. Heinrich , M. Herndon , J. Heuser , S. Hewamanage , M. Hickman , D. Hidas , C. S. Hill , D. Hirschbuehl , A. Hocker , S. Hou , M. Houlden , S. -C. Hsu , R. E. Hughes , M. Hurwitz , U. Husemann , M. Hussein , J. Huston , J. Incandela , G. Introzzi , M. Iori , A. Ivanov , E. James , D. Jang , B. Jayatilaka , E. J. Jeon , M. K. Jha , S. Jindariani , W. Johnson , M. Jones , K. K. Joo , S. Y. Jun , J. E. Jung , T. R. Junk , T. Kamon , D. Kar , P. E. Karchin , Y. Kato , R. Kephart , W. Ketchum , J. Keung , V. Khotilovich , B. Kilminster , D. H. Kim , H. S. Kim , H. W. Kim , J. E. Kim , M. J. Kim , S. B. Kim , S. H. Kim , Y. K. Kim , N. Kimura , L. Kirsch , S. Klimenko , K. Kondo , D. J. Kong , J. Konigsberg , A. Korytov , A. V. Kotwal , M. Kreps , J. Kroll , D. Krop , N. Krumnack , M. Kruse , V. Krutelyov , T. Kuhr , N. P. Kulkarni , M. Kurata , S. Kwang , A. T. Laasanen , S. Lami , S. Lammel , M. Lancaster , R. L. Lander , K. Lannon , A. Lath , G. Latino , I. Lazzizzera , T. LeCompte , E. Lee , H. S. Lee , J. S. Lee , S. W. Lee , S. Leone , J. D. Lewis , C. -J. Lin , J. Linacre , M. Lindgren , E. Lipeles , A. Lister , D. O. Litvintsev , C. Liu , T. Liu , N. S. Lockyer , A. Loginov , L. Lovas , D. Lucchesi , J. Lueck , P. Lujan , P. Lukens , G. Lungu , J. Lys , R. Lysak , D. MacQueen , R. Madrak , K. Maeshima , K. Makhoul , P. Maksimovic , S. Malde , S. Malik , G. Manca , A. Manousakis-Katsikakis , F. Margaroli , C. Marino , C. P. Marino , A. Martin , V. Martink , M. Martinez , R. Martinez-Ballarin , P. Mastrandrea , M. Mathis , M. E. Mattson , P. Mazzanti , K. S. McFarland , P. McIntyre , R. McNulty , A. Mehta , P. Mehtala , A. Menzione , C. Mesropian , T. Miao , D. Mietlicki , N. Miladinovic , R. Miller , C. Mills , M. Milnik , A. Mitra , G. Mitselmakher , H. Miyake , S. Moed , N. Moggi , M. N. Mondragon , C. S. Moon , R. Moore , M. J. Morello , J. Morlock , P. Movilla Fernandez , J. Mulmenstadt , A. Mukherjee , Th. Muller , P. Murat , M. Mussini , J. Nachtman , Y. Nagai , J. Naganoma , K. Nakamura , Nakano , A. Napier , J. Nett , C. Neu , M. S. Neubauer , S. Neubauer , J. Nielseng , L. Nodulman , M. Norman , O. Norniella , E. Nurse , L. Oakes , S. H. Oh , Y. D. Oh , I. Oksuzian , T. Okusawa , R. Orava , K. Osterberg , S. Pagan Griso , C. Pagliarone , E. Palencia , V. Papadimitriou , A. Papaikonomou , A. A. Paramanov , B. Parks , S. Pashapour , J. Patrick , G. Pauletta , M. Paulini , C. Paus , T. Peiffer , D. E. Pellett , A. Penzo , T. J. Phillips , G. Piacentino , E. Pianori , L. Pinera , K. Pitts , C. Plager , L. Pondrom , K. Potamianos , O. Poukhov , F. Prokoshin , A. Pronko , F. Ptohos , E. Pueschel , G. Punzi , J. Pursley , J. Rademacker , A. Rahaman , V. Ramakrishnan , N. Ranjan , I. Redondo , P. Renton , M. Renz , M. Rescigno , S. Richter , F. Rimondi , L. Ristori , A. Robson , T. Rodrigo , T. Rodriguez , E. Rogers , S. Rolli , R. Roser , M. Rossi , R. Rossin , P. Roy , A. Ruiz , J. Russ , V. Rusu , B. Rutherford , H. Saarikko , A. Safonov , W. K. Sakumoto , L. Santi , L. Sartori , K. Sato , A. Savoy-Navarro , P. Schlabach , A. Schmidt , E. E. Schmidt , M. A. Schmidt , M. P. Schmidt , M. Schmitt , T. Schwarz , L. Scodellaro , A. Scribano , F. Scuri , A. Sedov , S. Seidel , Y. Seiya , A. Semenov , L. Sexton-Kennedy , F. Sforza , A. Sfyrla , S. Z. Shalhout , T. Shears , P. F. Shepard , M. Shimojima , S. Shiraishi , M. Shochet , Y. Shon , I. Shreyber , A. Simonenko , P. Sinervo , A. Sisakyan , A. J. Slaughter , J. Slaunwhite , K. Sliwa , J. R. Smith , F. D. Snider , R. Snihur , A. Soha , S. Somalwar , V. Sorin , P. Squillacioti , M. Stanitzki , R. St. Denis , B. Stelzer , O. Stelzer-Chilton , D. Stentz , J. Strologas , G. L. Strycker , J. S. Suh , A. Sukhanov , I. Suslov , A. Taffard , R. Takashima , Y. Takeuchi , R. Tanaka , J. Tang , M. Tecchio , P. K. Teng , J. Thom , J. Thome , G. A. Thompson , E. Thomson , P. Tipton , P. Ttito-Guzmán , S. Tkaczyk , D. Toback , S. Tokar , K. Tollefson , T. Tomura , D. Tonelli , S. Torre , D. Torretta , P. Totaro , S. Tourneur , M. Trovato , S. -Y. Tsai , Y. Tu , N. Turiniff , F. Ukegawa , S. Uozumi , N. van Remortel , A. Varganov , E. Vataga , F. Vázquez , G. Velev , C. Vellidis , M. Vidal , I. Vila , R. Vilar , M. Vogel , I. Volobouev , G. Volpi , P. Wagner , R. G. Wagner , R. L. Wagner , W. Wagner , J. Wagner-Kuhr , T. Wakisaka , R. Wallny , S. M. Wang , A. Warburton , D. Waters , M. Weinberger , J. Weinelt , W. C. Wester , B. Whitehouse , D. Whiteson , A. B. Wicklund , E. Wicklund , S. Wilbur , G. Williams , H. H. Williams , M. G. Wilson , P. Wilson , B. L. Winer , P. Wittich , S. Wolbers , C. Wolfe , H. Wolfe , T. Wright , X. Wu , F. Würthwein , A. Yagil , K. Yamamoto , J. Yamaoka , U. K. Yang , Y. C. Yang , W. M. Yao , G. P. Yeh , K. Yio , J. Yoh , K. Yorita , T. Yoshidal , G. B. Yu , I. Yu , S. S. Yu , J. C. Yun , A. Zanetti , Y. Zeng , X. Zhang , Y. Zheng , S. Zucchelli

Transverse Spin Physics at COMPASS

The study of transverse spin effects is part of the scientific program of COMPASS, a fixed target experiment at the CERN SPS. COMPASS investigates the transversity PDFs in semi-inclusive DIS, using a longitudinally polarized muon beam of…

High Energy Physics - Experiment · Physics 2019-08-13 Federica Sozzi

Insights on non-perturbative aspects of TMDs from models

Transverse momentum dependent parton distribution functions are a key ingredient in the description of spin and azimuthal asymmetries in deep-inelastic scattering processes. Recent results from non-perturbative calculations in effective…

High Energy Physics - Phenomenology · Physics 2010-02-04 H. Avakian , A. V. Efremov , P. Schweitzer , O. V. Teryaev , F. Yuan , P. Zavada

Single transverse spin asymmetries for semi-inclusive pion production in DIS

We present a phenomenological approach to the description of single transverse spin asymmetries (STSA) in inclusive hadron production. It generalizes the pQCD formalism for high energies and large p_T inclusive hadron production processes,…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Anselmino , M. Boglione , F. Murgia

Extraction of finite-energy contributions to the Sivers asymmetry from the analysis of exclusive proton-proton scattering

I study the effect of scalar and spin-orbit rescattering terms, in the production of a nonzero Sivers-like asymmetry in proton-proton collisions (nclusive production and Drell-Yan) at moderate center of mass energies $\sqrt{s}$ $<$ 15 GeV…

High Energy Physics - Phenomenology · Physics 2008-11-26 Andrea Bianconi

Heavy quark production at collider energies: some selected topics

We discuss production of charm quarks and mesons as well as nonphotonic electrons in $pp$ scattering at RHIC. The distributions in rapidity and transverse momentum of charm and bottom quarks/antiquarks are calculated in the…

High Energy Physics - Phenomenology · Physics 2011-12-12 Antoni Szczurek

Two-hadron semi-inclusive production including subleading twist

We extend the analysis of two-hadron fragmentation functions to the subleading twist, discussing also the issue of color gauge invariance. Our results can be used anywhere two unpolarized hadrons are semi-inclusively produced in the same…

High Energy Physics - Phenomenology · Physics 2009-11-10 Alessandro Bacchetta , Marco Radici

Azimuthal asymmetries in unpolarized SIDIS and Drell-Yan processes: a case study towards TMD factorization at subleading twist

We consider the azimuthal distribution of the final observed hadron in semi-inclusive deep-inelastic scattering and the lepton pair in the Drell-Yan process. In particular, we focus on the $\cos \phi$ modulation of the unpolarized cross…

High Energy Physics - Phenomenology · Physics 2019-08-14 Alessandro Bacchetta , Giuseppe Bozzi , Miguel G. Echevarria , Cristian Pisano , Alexey Prokudin , Marco Radici

Statistical hadronisation model and transverse momentum spectra of hadrons in high energy collisions

A detailed analysis of transverse momentum spectra of several identified hadrons in high energy collisions within the canonical framework of the statistical model of hadronisation is performed. The study of particle momentum spectra…

High Energy Physics - Phenomenology · Physics 2011-09-13 F. Becattini , G. Passaleva

SIDIS transverse spin azimuthal asymmetries at COMPASS: Multidimensional analysis

Exploration of transverse spin structure of the nucleon via study of the spin (in)dependent azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS) and Drell-Yan (DY) reactions is one of the main aspects of the broad…

High Energy Physics - Experiment · Physics 2015-12-23 Bakur Parsamyan

Transverse hydrodynamics with sudden hadronization -- production of strangeness

We consider a physical scenario for ultra-relativistic heavy-ion collisions where, at the early stage, only transverse degrees of freedom of partons are thermalized, while the longitudinal motion is described by free streaming. When the…

Nuclear Theory · Physics 2014-11-20 W. Florkowski , R. Ryblewski

Perturbative contribution to the sin(phi) asymmetry in inclusive pi^{+} electroproduction

We consider the sin(phi) single target-spin asymmetry in deep-inelastic pi^{+} inclusive electroproduction off a longitudinally polarized target. We show that at larger transverse momentum of the outgoing hadron the evaluated asymmetry…

High Energy Physics - Phenomenology · Physics 2016-09-06 K. A. Oganessyan , N. Bianchi , E. De Sanctis , W. -D. Nowak

Probing transverse quark polarization in deep-inelastic leptoproduction

The azimuthal dependence of hadrons produced in lepton scattering off a polarized hadron probes the quark transverse-spin distributions. In the calculation of the asymmetries, transverse momenta of quarks in the distribution and…

High Energy Physics - Phenomenology · Physics 2011-07-19 R. D. Tangerman , P. J. Mulders

Towards an explanation of transverse single-spin asymmetries in proton-proton collisions: the role of fragmentation in collinear factorization

We study the transverse single-spin asymmetry for single-hadron production in proton-proton collisions within the framework of collinear twist-3 factorization in Quantum Chromodynamics. By taking into account the contribution due to parton…

High Energy Physics - Phenomenology · Physics 2015-06-19 K. Kanazawa , Y. Koike , A. Metz , D. Pitonyak