Related papers: Single Spin Asymmetries at COMPASS with transverse…

Nucleon Spin Structure with hadronic collisions at COMPASS

In order to illustrate the capabilities of COMPASS using a hadronic beam, I review some of the azimuthal asymmetries in hadronic collisions, that allow for the extraction of transversity, Sivers and Boer-Mulders functions, necessary to…

High Energy Physics - Phenomenology · Physics 2007-08-03 Marco Radici , Francesco Conti , Alessandro Bacchetta , Andrea Bianconi

Polarised Drell-Yan results from COMPASS

The COMPASS experiment at CERN is one of the leading experiments studying the nucleon spin structure. Until 2012 the Parton Distribution Functions and the Transverse Momentum Dependent Parton Distribution Functions (TMDs) were extensively…

High Energy Physics - Experiment · Physics 2018-04-26 Celso Franco

Predictions for single spin asymmetries in lepton + p(transv. polarized) -> pion + X and gamma^* + p(transv. polarized) -> pion + X

Predictions for the single transverse spin asymmetry A_N in semi-inclusive DIS processes are given; non negligible values of A_N may arise from spin effects in the fragmentation of a polarized quark into a final hadron with a transverse…

High Energy Physics - Phenomenology · Physics 2011-09-13 M. Anselmino , M. Boglione , J. Hansson , F. Murgia

Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized $^3$He Target

We report the first measurement of target single spin asymmetries in the semi-inclusive $^3{He}(e,e'\pi^\pm)X$ reaction on a transversely polarized target. The experiment, conducted at Jefferson Lab using a 5.9 GeV electron beam, covers a…

Nuclear Experiment · Physics 2011-08-17 X. Qian , K. Allada , C. Dutta , J. Huang , J. Katich , Y. Wang , Y. Zhang , K. Aniol , J. R. M. Annand , T. Averett , F. Benmokhtar , W. Bertozzi , P. C. Bradshaw , P. Bosted , A. Camsonne , M. Canan , G. D. Cates , C. Chen , J. -P. Chen , W. Chen , K. Chirapatpimol , E. Chudakov , E. Cisbani , J. C. Cornejo , F. Cusanno , M. M. Dalton , W. Deconinck , C. W. de Jager , R. De Leo , X. Deng , A. Deur , H. Ding , P. A. M. Dolph , D. Dutta , L. El Fassi , S. Frullani , H. Gao , F. Garibaldi , D. Gaskell , S. Gilad , R. Gilman , O. Glamazdin , S. Golge , L. Guo , D. Hamilton , O. Hansen , D. W. Higinbotham , T. Holmstrom , M. Huang , H. F. Ibrahim , M. Iodice , X. Jiang , G. Jin , M. K. Jones , A. Kelleher , W. Kim , A. Kolarkar , W. Korsch , J. J. LeRose , X. Li , Y. Li , R. Lindgren , N. Liyanage , E. Long , H. -J. Lu , D. J. Margaziotis , P. Markowitz , S. Marrone , D. McNulty , Z. -E. Meziani , R. Michaels , B. Moffit , C. Munoz Camacho , S. Nanda , A. Narayan , V. Nelyubin , B. Norum , Y. Oh , M. Osipenko , D. Parno , J. C. Peng , S. K. Phillips , M. Posik , A. J. R. Puckett , Y. Qiang , A. Rakhman , R. D. Ransome , S. Riordan , A. Saha , B. Sawatzky , E. Schulte , A. Shahinyan , M. H. Shabestari , S. Širca , S. Stepanyan , R. Subedi , V. Sulkosky , L. -G. Tang , A. Tobias , G. M. Urciuoli , I. Vilardi , K. Wang , B. Wojtsekhowski , X. Yan , H. Yao , Y. Ye , Z. Ye , L. Yuan , X. Zhan , Y. -W. Zhang , B. Zhao , X. Zheng , L. Zhu , X. Zhu , X. Zong

Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target

We report the first measurement of the transverse momentum dependence of double spin asymmetries in semi-inclusive production of pions in deep inelastic scattering off the longitudinally polarized proton. Data have been obtained using a…

High Energy Physics - Experiment · Physics 2010-12-28 The CLAS Collaboration , H. Avakian , P. Bosted , V. D. Burkert , L. Elouadrhiri , K. P. Adhikari , M. Aghasyan , M. Amaryan , M. Anghinolfi , H. Baghdasaryan , J. Ball , M. Battaglieri , I. Bedlinskiy , A. S. Biselli , D. Branford , W. J. Briscoe , W. Brooks , D. S. Carman , L. Casey , P. L. Cole , P. Collins , D. Crabb , V. Crede , A. D'Angelo , A. Daniel , N. Dashyan , R. DeVita , E. DeSanctis , A. Deur , B. Dey , S. Dhamija , R. Dickson , C. Djalali , G. Dodge , D. Doughty , R. Dupre , A. ElAlaoui , P. Eugenio , S. Fegan , R. Fersch , T. A. Forest , A. Fradi , M. Y. Gabrielyan , G. Gavalian , N. Gevorgyan , G. P. Gilfoyle , K. L. Giovanetti , F. X. Girod , W. Gohn , R. W. Gothe , K. A. Griffioen , M. Guidal , N. Guler , L. Guo , K. Hafidi , H. Hakobyan , C. Hanretty , N. Hassall , D. Heddle , K. Hicks , M. Holtrop , Y. Ilieva , D. G. Ireland , E. L. Isupov , S. S. Jawalkar , H. S. Jo , K. Joo , D. Keller , M. Khandaker , P. Khetarpal , W. Kim , A. Klein , F. J. Klein , P. Konczykowski , V. Kubarovsky , S. E. Kuhn , S. V. Kuleshov , V. Kuznetsov , K. Livingston , H. Y. Lu , N. Markov , M. Mayer , J. McAndrew , M. E. McCracken , B. McKinnon , C. A. Meyer , T. Mineeva , M. Mirazita , V. Mokeev , B. Moreno , K. Moriya , B. Morrison , H. Moutarde , E. Munevar , P. Nadel-Turonski , R. Nasseripour , S. Niccolai , G. Niculescu , I. Niculescu , M. R. Niroula , M. Osipenko , A. I. Ostrovidov , R. Paremuzyan , K. Park , S. Park , E. Pasyuk , S. Anefalos Pereira , Y. Perrin , S. Pisano , O. Pogorelko , J. W. Price , S. Procureur , Y. Prok , D. Protopopescu , B. A. Raue , G. Ricco , M. Ripani , G. Rosner , P. Rossi , F. Sabatié , M. S. Saini , J. Salamanca , C. Salgado , R. A. Schumacher , E. Seder , H. Seraydaryan , Y. G. Sharabian , D. I. Sober , D. Sokhan , S. S. Stepanyan , S. Stepanyan , P. Stoler , S. Strauch , R. Suleiman , M. Taiuti , D. J. Tedeschi , S. Tkachenko , M. Ungaro , B . Vernarsky , M. F. Vineyard , E. Voutier , D. P. Watts , L. B. Weinstein , D. P. Weygand , M. H. Wood , J. Zhang , B. Zhao , Z. W. Zhao

Measurements of unpolarised azimuthal asymmetries at COMPASS

Azimuthal asymmetries in unpolarized SIDIS can be used to probe the transverse momentum of the quarks inside the nucleon. Furthermore they give access to the so-far unmeasured Boer-Mulders function. We report on the extraction of these…

High Energy Physics - Experiment · Physics 2019-08-13 Giulio Sbrizzai

Transverse-single-spin asymmetries of charged pions at midrapidity in transversely polarized $p{+}p$ collisions at $\sqrt{s}=200$ GeV

In 2015, the PHENIX collaboration has measured single-spin asymmetries for charged pions in transversely polarized proton-proton collisions at the center of mass energy of $\sqrt{s}=200$ GeV. The pions were detected at central rapidities of…

High Energy Physics - Experiment · Physics 2022-02-11 U. A. Acharya , C. Aidala , Y. Akiba , M. Alfred , V. Andrieux , N. Apadula , H. Asano , B. Azmoun , V. Babintsev , N. S. Bandara , K. N. Barish , S. Bathe , A. Bazilevsky , M. Beaumier , R. Belmont , A. Berdnikov , Y. Berdnikov , L. Bichon , B. Blankenship , D. S. Blau , J. S. Bok , V. Borisov , M. L. Brooks , J. Bryslawskyj , V. Bumazhnov , S. Campbell , V. Canoa Roman , R. Cervantes , M. Chiu , C. Y. Chi , I. J. Choi , J. B. Choi , Z. Citron , M. Connors , R. Corliss , N. Cronin , T. Csörgő , M. Csanád , T. W. Danley , M. S. Daugherity , G. David , K. DeBlasio , K. Dehmelt , A. Denisov , A. Deshpande , E. J. Desmond , A. Dion , D. Dixit , J. H. Do , A. Drees , K. A. Drees , J. M. Durham , A. Durum , H. En'yo , A. Enokizono , R. Esha , S. Esumi , B. Fadem , W. Fan , N. Feege , D. E. Fields , M. Finger, , M. Finger , D. Fitzgerald , S. L. Fokin , J. E. Frantz , A. Franz , A. D. Frawley , Y. Fukuda , P. Gallus , C. Gal , P. Garg , H. Ge , M. Giles , F. Giordano , Y. Goto , N. Grau , S. V. Greene , M. Grosse Perdekamp , T. Gunji , H. Guragain , T. Hachiya , J. S. Haggerty , K. I. Hahn , H. Hamagaki , H. F. Hamilton , J. Hanks , S. Y. Han , M. Harvey , S. Hasegawa , T. O. S. Haseler , T. K. Hemmick , X. He , J. C. Hill , K. Hill , A. Hodges , R. S. Hollis , K. Homma , B. Hong , T. Hoshino , N. Hotvedt , J. Huang , K. Imai , M. Inaba , A. Iordanova , D. Isenhower , D. Ivanishchev , B. V. Jacak , M. Jezghani , X. Jiang , Z. Ji , B. M. Johnson , D. Jouan , D. S. Jumper , J. H. Kang , D. Kapukchyan , S. Karthas , D. Kawall , A. V. Kazantsev , V. Khachatryan , A. Khanzadeev , A. Khatiwada , C. Kim , E. -J. Kim , M. Kim , D. Kincses , A. Kingan , E. Kistenev , J. Klatsky , P. Kline , T. Koblesky , D. Kotov , L. Kovacs , S. Kudo , K. Kurita , Y. Kwon , J. G. Lajoie , D. Larionova , A. Lebedev , S. Lee , S. H. Lee , M. J. Leitch , Y. H. Leung , N. A. Lewis , S. H. Lim , M. X. Liu , X. Li , V. -R. Loggins , D. A. Loomis , K. Lovasz , D. Lynch , S. Lökös , T. Majoros , Y. I. Makdisi , M. Makek , V. I. Manko , E. Mannel , M. McCumber , P. L. McGaughey , D. McGlinchey , C. McKinney , M. Mendoza , A. C. Mignerey , A. Milov , D. K. Mishra , J. T. Mitchell , M. Mitrankova , Iu. Mitrankov , Iu. Mitrankov , G. Mitsuka , S. Miyasaka , S. Mizuno , M. M. Mondal , P. Montuenga , T. Moon , D. P. Morrison , B. Mulilo , T. Murakami , J. Murata , K. Nagai , K. Nagashima , T. Nagashima , J. L. Nagle , M. I. Nagy , I. Nakagawa , K. Nakano , C. Nattrass , S. Nelson , T. Niida , R. Nouicer , T. Novák , N. Novitzky , G. Nukazuka , A. S. Nyanin , E. O'Brien , C. A. Ogilvie , J. D. Orjuela Koop , J. D. Osborn , A. Oskarsson , G. J. Ottino , K. Ozawa , V. Pantuev , V. Papavassiliou , J. S. Park , S. Park , M. Patel , S. F. Pate , W. Peng , D. V. Perepelitsa , G. D. N. Perera , D. Yu. Peressounko , C. E. PerezLara , J. Perry , R. Petti , M. Phipps , C. Pinkenburg , R. P. Pisani , M. Potekhin , A. Pun , M. L. Purschke , P. V. Radzevich , N. Ramasubramanian , K. F. Read , D. Reynolds , V. Riabov , Y. Riabov , D. Richford , T. Rinn , S. D. Rolnick , M. Rosati , Z. Rowan , J. Runchey , A. S. Safonov , T. Sakaguchi , H. Sako , V. Samsonov , M. Sarsour , S. Sato , B. Schaefer , B. K. Schmoll , K. Sedgwick , R. Seidl , A. Sen , R. Seto , A. Sexton , D. Sharma , I. Shein , T. -A. Shibata , K. Shigaki , M. Shimomura , T. Shioya , P. Shukla , A. Sickles , C. L. Silva , D. Silvermyr , B. K. Singh , C. P. Singh , V. Singh , M. Slunečka , K. L. Smith , M. Snowball , R. A. Soltz , W. E. Sondheim , S. P. Sorensen , I. V. Sourikova , P. W. Stankus , S. P. Stoll , T. Sugitate , A. Sukhanov , T. Sumita , J. Sun , Z. Sun , J. Sziklai , K. Tanida , M. J. Tannenbaum , S. Tarafdar , A. Taranenko , G. Tarnai , R. Tieulent , A. Timilsina , T. Todoroki , M. Tomášek , C. L. Towell , R. S. Towell , I. Tserruya , Y. Ueda , B. Ujvari , H. W. van Hecke , J. Velkovska , M. Virius , V. Vrba , N. Vukman , X. R. Wang , Y. S. Watanabe , C. P. Wong , C. L. Woody , L. Xue , C. Xu , Q. Xu , S. Yalcin , Y. L. Yamaguchi , H. Yamamoto , A. Yanovich , I. Yoon , J. H. Yoo , I. E. Yushmanov , H. Yu , W. A. Zajc , A. Zelenski , S. Zharko , L. Zou

Measurement of the Transverse Single-Spin Asymmetry for Mid-rapidity Production of Neutral Pions in Polarized p+p Collisions at 200 GeV Center-of-Mass Energy

The spin structure of the proton has revealed itself to be extremely complex and is an area of ongoing research. The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL) inaugurated its operation as the first…

High Energy Physics - Experiment · Physics 2007-05-23 Christine Angela Aidala

Light-Meson Spectroscopy with COMPASS

COMPASS is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron investigating the structure and spectrum of hadrons. One primary goal is the search for new hadronic states, in particular spin-exotic mesons and…

High Energy Physics - Experiment · Physics 2019-08-14 Boris Grube

Transverse Spin Results From PHENIX

The PHENIX experiment at the Relativistic Heavy Ion Collider explores the spin structure of the proton in polarized p+p collisions at center-of-mass energies up to 500 GeV. Tremendous experimental and theoretical progress has been made…

High Energy Physics - Experiment · Physics 2019-08-13 Feng Wei

A partonic description of the transverse target single-spin asymmetry in inclusive DIS

The single-spin asymmetry of unpolarized leptons scattering deep-inelastically off transversely polarized nucleons is studied in a partonic picture within a collinear twist-3 framework. Since this observable is generated by multi-photon…

High Energy Physics - Phenomenology · Physics 2013-02-28 Marc Schlegel

Spin physics with STAR

The STAR collaboration aims to study polarized proton-proton collisions at RHIC. The emphasis of the spin run this year is on transverse single spin asymmetries. Beyond 2001, we aim to determine directly and precisely the gluon…

High Energy Physics - Phenomenology · Physics 2019-08-14 Joanna Kiryluk

Phenomenology of single spin asymmetries in p(transv. polarized)-p -> pion + X

A phenomenological description of single transverse spin effects in hadron-hadron inclusive processes is proposed, assuming a generalized factorization scheme and pQCD hard interactions. The transverse momentum, k_T, of the quarks inside…

High Energy Physics - Phenomenology · Physics 2008-11-26 Mauro Anselmino , Maria Boglione , Francesco Murgia

Pion Polarizabilities and Hybrid Meson Structure at CERN COMPASS

CERN COMPASS can investigate pion-photon interactions, to achieve a unique Primakoff Coulomb physics program, centered on pion polarizability and hybrid meson structure studies. COMPASS uses 100-280 GeV beams (muon, pion) and a virtual…

High Energy Physics - Experiment · Physics 2007-05-23 Murray Moinester

Predictions for Sivers single spin asymmetries in one- and two-hadron electroproduction at CLAS12 and EIC

The study of the Sivers effect, describing correlations between the transverse polarization of the nucleon and its constituent (unpolarized) parton's transverse momentum, has been the topic of a great deal of experimental, phenomenological…

High Energy Physics - Phenomenology · Physics 2015-09-30 Hrayr H. Matevosyan , Aram Kotzinian , Elke-Caroline Aschenauer , Harut Avakian , Anthony W. Thomas

Beyond Collins and Sivers: further measurements of the target transverse spin-dependent azimuthal asymmetries in semi-inclusive DIS from COMPASS

In semi-inclusive DIS of polarized leptons on a transversely polarized target eight azimuthal modulations appear in the cross-section. Within QCD parton model four azimuthal asymmetries can be interpreted at leading order, two of them being…

High Energy Physics - Experiment · Physics 2007-05-23 Aram Kotzinian

Measurement of the Transverse Single Spin Asymmetry of $p$ + $p^\uparrow$ $\rightarrow$ $\eta$ + $X$ at $\sqrt{s}$ = 200 GeV

The measurement of transverse single spin asymmetries ($A_N$) provides insight into the structure of the nucleon. Several mechanisms have been proposed that attempt to explain $A_N$ based on QCD, and additional measurements of $A_N$ for…

Nuclear Experiment · Physics 2019-08-13 David Kleinjan

Structure Functions and the Spin of the Nucleon: From HERMES to COMPASS

The HERMES and SMC experiments have determined the contribution of different quark flavors to the nucleon spin in a large range of Bjorken-x via semi-inclusive deep inelastic scattering. The main goal of the COMPASS experiment is to measure…

High Energy Physics - Experiment · Physics 2007-05-23 F. H. Heinsius

Measurement of the Collins and Sivers asymmetries on transversely polarised protons

The Collins and Sivers asymmetries for charged hadrons produced in deeply inelastic scattering on transversely polarised protons have been extracted from the data collected in 2007 with the CERN SPS muon beam tuned at 160 GeV/c. At large…

High Energy Physics - Experiment · Physics 2014-11-21 The COMPASS Collaboration , M. G. Alekseev

Hard Exclusive \rho^0-Meson Production at COMPASS

New results for the transverse target spin azimuthal asymmetry A_{UT}^{sin(\phi-\phi_S)} for hard exclusive \rho^0-meson production on a transversely polarised ^6LiD and NH_3 target will be presented. The measurement was performed with the…

High Energy Physics - Experiment · Physics 2019-08-14 H. Wollny