Related papers: How Could the Proton Transversity be Measured

Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at $\sqrt{s}=510$ GeV

We report measurements of the longitudinal double-spin asymmetry, $A_{LL}$, for inclusive jet and dijet production in polarized proton-proton collisions at midrapidity and center-of-mass energy $\sqrt{s}$ = 510 GeV, using the high…

High Energy Physics - Experiment · Physics 2022-05-25 STAR Collaboration , M. S. Abdallah , B. E. Aboona , J. Adam , L. Adamczyk , J. R. Adams , J. K. Adkins , G. Agakishiev , I. Aggarwal , M. M. Aggarwal , Z. Ahammed , A. Aitbaev , I. Alekseev , D. M. Anderson , A. Aparin , E. C. Aschenauer , M. U. Ashraf , F. G. Atetalla , G. S. Averichev , V. Bairathi , W. Baker , J. G. Ball Cap , K. Barish , A. Behera , R. Bellwied , P. Bhagat , A. Bhasin , J. Bielcik , J. Bielcikova , I. G. Bordyuzhin , J. D. Brandenburg , A. V. Brandin , X. Z. Cai , H. Caines , M. Calderón de la Barca Sánchez , D. Cebra , I. Chakaberia , P. Chaloupka , B. K. Chan , F-H. Chang , Z. Chang , A. Chatterjee , S. Chattopadhyay , D. Chen , J. Chen , J. H. Chen , X. Chen , Z. Chen , J. Cheng , S. Choudhury , W. Christie , X. Chu , H. J. Crawford , M. Csanád , M. Daugherity , T. G. Dedovich , I. M. Deppner , A. A. Derevschikov , A. Dhamija , L. Di Carlo , L. Didenko , P. Dixit , X. Dong , J. L. Drachenberg , E. Duckworth , J. C. Dunlop , J. Engelage , G. Eppley , S. Esumi , O. Evdokimov , A. Ewigleben , O. Eyser , R. Fatemi , F. M. Fawzi , S. Fazio , C. J. Feng , Y. Feng , E. Finch , Y. Fisyak , A. Francisco , C. Fu , C. A. Gagliardi , T. Galatyuk , F. Geurts , N. Ghimire , A. Gibson , K. Gopal , X. Gou , D. Grosnick , A. Gupta , W. Guryn , A. Hamed , Y. Han , S. Harabasz , M. D. Harasty , J. W. Harris , H. Harrison , S. He , W. He , X. H. He , Y. He , S. Heppelmann , S. Heppelmann , N. Herrmann , E. Hoffman , L. Holub , C. Hu , Q. Hu , Y. Hu , H. Huang , H. Z. Huang , S. L. Huang , T. Huang , X. Huang , Y. Huang , T. J. Humanic , D. Isenhower , M. Isshiki , W. W. Jacobs , C. Jena , A. Jentsch , Y. Ji , J. Jia , K. Jiang , X. Ju , E. G. Judd , S. Kabana , M. L. Kabir , S. Kagamaster , D. Kalinkin , K. Kang , D. Kapukchyan , K. Kauder , H. W. Ke , D. Keane , A. Kechechyan , M. Kelsey , Y. V. Khyzhniak , D. P. Kikoła , B. Kimelman , D. Kincses , I. Kisel , A. Kiselev , A. G. Knospe , H. S. Ko , L. Kochenda , A. Korobitsin , L. K. Kosarzewski , L. Kramarik , P. Kravtsov , L. Kumar , S. Kumar , R. Kunnawalkam Elayavalli , J. H. Kwasizur , R. Lacey , S. Lan , J. M. Landgraf , J. Lauret , A. Lebedev , R. Lednicky , J. H. Lee , Y. H. Leung , N. Lewis , C. Li , C. Li , W. Li , X. Li , Y. Li , X. Liang , Y. Liang , R. Licenik , T. Lin , Y. Lin , M. A. Lisa , F. Liu , H. Liu , H. Liu , P. Liu , T. Liu , X. Liu , Y. Liu , Z. Liu , T. Ljubicic , W. J. Llope , R. S. Longacre , E. Loyd , T. Lu , N. S. Lukow , X. F. Luo , L. Ma , R. Ma , Y. G. Ma , N. Magdy , D. Mallick , S. L. Manukhov , S. Margetis , C. Markert , H. S. Matis , J. A. Mazer , N. G. Minaev , S. Mioduszewski , B. Mohanty , M. M. Mondal , I. Mooney , D. A. Morozov , A. Mukherjee , M. Nagy , J. D. Nam , Md. Nasim , K. Nayak , D. Neff , J. M. Nelson , D. B. Nemes , M. Nie , G. Nigmatkulov , T. Niida , R. Nishitani , L. V. Nogach , T. Nonaka , A. S. Nunes , G. Odyniec , A. Ogawa , S. Oh , V. A. Okorokov , K. Okubo , B. S. Page , R. Pak , J. Pan , A. Pandav , A. K. Pandey , Y. Panebratsev , P. Parfenov , A. Paul , B. Pawlik , D. Pawlowska , C. Perkins , J. Pluta , B. R. Pokhrel , J. Porter , M. Posik , V. Prozorova , N. K. Pruthi , M. Przybycien , J. Putschke , H. Qiu , A. Quintero , C. Racz , S. K. Radhakrishnan , N. Raha , R. L. Ray , R. Reed , H. G. Ritter , M. Robotkova , O. V. Rogachevskiy , J. L. Romero , D. Roy , L. Ruan , A. K. Sahoo , N. R. Sahoo , H. Sako , S. Salur , E. Samigullin , J. Sandweiss , S. Sato , W. B. Schmidke , N. Schmitz , B. R. Schweid , F. Seck , J. Seger , R. Seto , P. Seyboth , N. Shah , E. Shahaliev , P. V. Shanmuganathan , M. Shao , T. Shao , R. Sharma , A. I. Sheikh , D. Y. Shen , S. S. Shi , Y. Shi , Q. Y. Shou , E. P. Sichtermann , R. Sikora , J. Singh , S. Singha , P. Sinha , M. J. Skoby , N. Smirnov , Y. Söhngen , W. Solyst , Y. Song , H. M. Spinka , B. Srivastava , T. D. S. Stanislaus , M. Stefaniak , D. J. Stewart , M. Strikhanov , B. Stringfellow , A. A. P. Suaide , M. Sumbera , B. Summa , X. M. Sun , X. Sun , Y. Sun , Y. Sun , B. Surrow , D. N. Svirida , Z. W. Sweger , P. Szymanski , A. H. Tang , Z. Tang , A. Taranenko , T. Tarnowsky , J. H. Thomas , A. R. Timmins , D. Tlusty , T. Todoroki , M. Tokarev , C. A. Tomkiel , S. Trentalange , R. E. Tribble , P. Tribedy , S. K. Tripathy , T. Truhlar , B. A. Trzeciak , O. D. Tsai , Z. Tu , T. Ullrich , D. G. Underwood , I. Upsal , G. Van Buren , J. Vanek , A. N. Vasiliev , I. Vassiliev , V. Verkest , F. Videbæk , S. Vokal , S. A. Voloshin , F. Wang , G. Wang , J. S. Wang , P. Wang , X. Wang , Y. Wang , Y. Wang , Z. Wang , J. C. Webb , P. C. Weidenkaff , G. D. Westfall , H. Wieman , S. W. Wissink , R. Witt , J. Wu , J. Wu , Y. Wu , B. Xi , Z. G. Xiao , G. Xie , W. Xie , H. Xu , N. Xu , Q. H. Xu , Y. Xu , Z. Xu , Z. Xu , G. Yan , C. Yang , Q. Yang , S. Yang , Y. Yang , Z. Ye , Z. Ye , L. Yi , K. Yip , Y. Yu , H. Zbroszczyk , W. Zha , C. Zhang , D. Zhang , J. Zhang , S. Zhang , S. Zhang , Y. Zhang , Y. Zhang , Y. Zhang , Z. J. Zhang , Z. Zhang , Z. Zhang , F. Zhao , J. Zhao , M. Zhao , C. Zhou , Y. Zhou , X. Zhu , M. Zurek , M. Zyzak

First measurement of interference fragmentation on a transversely polarized hydrogen target

The HERMES experiment has measured for the first time single target-spin asymmetries in semi-inclusive two-pion production using a transversely polarized hydrogen target. These asymmetries are related to the product of two unknowns, the…

High Energy Physics - Experiment · Physics 2019-08-14 P. B. van der Nat

Azimuthal Spin Asymmetries of Pion Electroproduction

Azimuthal spin asymmetries, both for charged and neutral pion production in semi-inclusive deep inelastic scattering of unpolarized charged lepton beams on longitudinally and transversely polarized nucleon targets, are analyzed and…

High Energy Physics - Phenomenology · Physics 2009-11-07 Bo-Qiang Ma , Ivan Schmidt , Jian-Jun Yang

Cross Sections and Transverse Single-Spin Asymmetries in Forward Jet Production from Proton Collisions at $\sqrt{s}=500$ GeV

Measurements of the production of forward jets from transversely polarized proton collisions at $\sqrt{s}=500$ GeV conducted at the Relativistic Heavy Ion Collider (RHIC) are reported. Our measured jet cross section is consistent with hard…

High Energy Physics - Experiment · Physics 2015-10-14 L. C. Bland , E. J. Brash , H. J. Crawford , A. A. Derevschikov , K. A. Drees , J. Engelage , C. Folz , M. K. Jones , E. G. Judd , X. Li , N. K. Liyanage , Y. Makdisi , N. G. Minaev , R. N. Munroe , L. Nogach , A. Ogawa , C. F. Perdrisat , C. Perkins , M. Planinic , V. Punjabi , G. Schnell , G. Simatovic , T. G. Throwe , C. Van Hulse , A. N. Vasiliev

Proposal for the first measurement of antiproton polarization in proton-nucleus interactions

Spin dependent phenomena in inclusive hadron production have been extensively investigated, yet their microscopic origin and universality across different hadrons are still not fully understood. In particular, it is presently unknown…

High Energy Physics - Experiment · Physics 2026-05-20 D. Alfs , D. Grzonka , G. Khatri , P. Kulessa , J. Ritman , T. Sefzick , J. Smyrski , V. Verhoeven , H. Xu , M. Zielinski

Measurement and QCD analysis of double-differential inclusive jet cross sections in proton-proton collisions at $\sqrt{s}$ = 13 TeV

A measurement of the inclusive jet production in proton-proton collisions at the LHC at $\sqrt{s}$ = 13 TeV is presented. The double-differential cross sections are measured as a function of the jet transverse momentum $p_\mathrm{T}$ and…

High Energy Physics - Experiment · Physics 2023-10-09 CMS Collaboration

Measurement of the double longitudinal spin asymmetry in inclusive jet production in polarized p+p collisions at sqrt(s) = 200 GeV

We present preliminary results for the first measurements of the double longitudinal spin asymmetry A_LL in inclusive jet production at mid-rapidity in polarized proton-proton collisions at sqrt(s) = 200 GeV. The data amount to ~ 0.5 pb-1…

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

Azimuthal asymmetry in electro-production of neutral pions in SIDIS

Recently HERMES has observed an azimuthal asymmetry in electro-production of neutral pions in semi-inclusive deep-inelastic scattering of unpolarized positrons off longitudinally polarized protons. This asymmetry (like those observed in the…

High Energy Physics - Phenomenology · Physics 2008-11-26 A. V. Efremov , K. Goeke , P. Schweitzer

Transverse momentum dependent distributions with jets

We investigate the use of jets to measure transverse momentum dependent distributions (TMDs). The example we use to present our framework is the dijet momentum decorrelation at lepton colliders. Translating this momentum decorrelation into…

High Energy Physics - Phenomenology · Physics 2018-10-24 Daniel Gutierrez-Reyes , Ignazio Scimemi , Wouter J. Waalewijn , Lorenzo Zoppi

Intrinsic transverse momentum and transverse spin asymmetries

We investigate leading twist transverse momentum dependent origins of transverse spin asymmetries in hadron-hadron collisions. The chiral-odd T-odd distribution function with intrinsic transverse momentum dependence, which would signal an…

High Energy Physics - Phenomenology · Physics 2009-10-31 Daniel Boer

T-odd fragmentation functions

We discuss the properties of fragmentation functions arising from the interference of two leading hadrons produced inside the same jet in the current fragmentation region of a hard process. For the case of semi-inclusive Deep Inelastic…

High Energy Physics - Phenomenology · Physics 2009-11-07 M. Radici

Transverse Deformation of Parton Distributions and Transversity Decomposition of Angular Momentum

Impact parameter dependent parton distributions are transversely distorted when one considers transversely polarized nucleons and/or quarks. This provides a physical mechanism for the T-odd Sivers effect in semi-inclusive deep-inelastic…

High Energy Physics - Phenomenology · Physics 2009-11-11 Matthias Burkardt

Addressing transversity with interference fragmentation functions

The class of interference fragmentation functions, arising from interference among different hadron production channels, is reconsidered. Their symmetry properties with respect to chiral transformations allow building spin asymmetries where…

High Energy Physics - Phenomenology · Physics 2017-08-23 M. Radici

Studies of Azimuthal Modulations in Two Hadron Fragmentation of a Transversely Polarised Quark

We study the azimuthal modulations of dihadron fragmentation functions (DiFFs) of a transversely polarised quark using an NJL-jet based model that incorporates the Collins effect for single hadron emission. The DiFFs are extracted as Monte…

High Energy Physics - Phenomenology · Physics 2014-03-11 Hrayr H. Matevosyan , Aram Kotzinian , Anthony W. Thomas

We summarize the latest achievements about the extraction of the transversity parton distribution and proton tensor charge based on an analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets.…

High Energy Physics - Phenomenology · Physics 2015-06-17 Marco Radici , Alessandro Bacchetta , A. Courtoy

Transversity Physics at Compass

Transverse spin physics is an important part of the scientific programme of the COMPASS experiment at CERN, which started taking data in 2002, scattering 160 GeV/c muon beam on a polarized $^6$LiD target. The analysis of the data taken with…

High Energy Physics - Experiment · Physics 2007-05-23 F. Bradamante

Polarization and cross section of midrapidity J/$\psi$ production in proton-proton collisions at $\sqrt{s}=510$ GeV

The PHENIX experiment has measured the spin alignment for inclusive $J/\psi\rightarrow e^{+}e^{-}$ decays in $p$+$p$ collisions at $\sqrt{s}=510$ GeV at midrapidity. The angular distributions have been measured in three different…

High Energy Physics - Experiment · Physics 2020-11-04 U. Acharya , A. Adare , C. Aidala , N. N. Ajitanand , Y. Akiba , R. Akimoto , M. Alfred , N. Apadula , Y. Aramaki , H. Asano , E. T. Atomssa , T. C. Awes , B. Azmoun , V. Babintsev , M. Bai , N. S. Bandara , B. Bannier , K. N. Barish , S. Bathe , A. Bazilevsky , M. Beaumier , S. Beckman , R. Belmont , A. Berdnikov , Y. Berdnikov , L. Bichon , D. Black , B. Blankenship , J. S. Bok , V. Borisov , K. Boyle , M. L. Brooks , J. Bryslawskyj , H. Buesching , V. Bumazhnov , S. Campbell , V. Canoa Roman , C. -H. Chen , C. Y. Chi , M. Chiu , I. J. Choi , J. B. Choi , T. Chujo , Z. Citron , M. Connors , M. Csanád , T. Csörgő , A. Datta , M. S. Daugherity , G. David , K. DeBlasio , K. Dehmelt , A. Denisov , A. Deshpande , E. J. Desmond , L. Ding , A. Dion , J. H. Do , A. Drees , K. A. Drees , J. M. Durham , A. Durum , A. Enokizono , H. En'yo , R. Esha , S. Esumi , B. Fadem , W. Fan , N. Feege , D. E. Fields , M. Finger , M. Finger, , D. Firak , D. Fitzgerald , S. L. Fokin , J. E. Frantz , A. Franz , A. D. Frawley , C. Gal , P. Gallus , P. Garg , H. Ge , F. Giordano , A. Glenn , Y. Goto , N. Grau , S. V. Greene , M. Grosse Perdekamp , Y. Gu , T. Gunji , H. Guragain , T. Hachiya , J. S. Haggerty , K. I. Hahn , H. Hamagaki , S. Y. Han , J. Hanks , S. Hasegawa , X. He , T. K. Hemmick , J. C. Hill , A. Hodges , R. S. Hollis , K. Homma , B. Hong , T. Hoshino , J. Huang , S. Huang , Y. Ikeda , K. Imai , Y. Imazu , M. Inaba , A. Iordanova , D. Isenhower , D. Ivanishchev , B. V. Jacak , S. J. Jeon , M. Jezghani , Z. Ji , J. Jia , X. Jiang , B. M. Johnson , E. Joo , K. S. Joo , D. Jouan , D. S. Jumper , J. H. Kang , J. S. Kang , D. Kawall , A. V. Kazantsev , J. A. Key , V. Khachatryan , A. Khanzadeev , A. Khatiwada , K. Kihara , C. Kim , D. H. Kim , D. J. Kim , E. -J. Kim , H. -J. Kim , M. Kim , Y. K. Kim , D. Kincses , E. Kistenev , J. Klatsky , D. Kleinjan , P. Kline , T. Koblesky , M. Kofarago , J. Koster , D. Kotov , B. Kurgyis , K. Kurita , M. Kurosawa , Y. Kwon , R. Lacey , J. G. Lajoie , D. Larionova , M. Larionova , A. Lebedev , K. B. Lee , S. H. Lee , M. J. Leitch , M. Leitgab , N. A. Lewis , X. Li , S. H. Lim , M. X. Liu , S. Lökös , D. Lynch , T. Majoros , Y. I. Makdisi , M. Makek , A. Manion , V. I. Manko , E. Mannel , M. McCumber , P. L. McGaughey , D. McGlinchey , C. McKinney , A. Meles , M. Mendoza , B. Meredith , W. J. Metzger , Y. Miake , A. C. Mignerey , A. J. Miller , A. Milov , D. K. Mishra , J. T. Mitchell , Iu. Mitrankov , S. Miyasaka , S. Mizuno , P. Montuenga , T. Moon , D. P. Morrison , S. I. Morrow , T. V. Moukhanova , B. Mulilo , T. Murakami , J. Murata , A. Mwai , S. Nagamiya , J. L. Nagle , M. I. Nagy , I. Nakagawa , H. Nakagomi , K. Nakano , C. Nattrass , S. Nelson , P. K. Netrakanti , M. Nihashi , T. Niida , R. Nouicer , N. Novitzky , A. S. Nyanin , E. O'Brien , C. A. Ogilvie , J. D. Orjuela Koop , J. D. Osborn , A. Oskarsson , K. Ozawa , R. Pak , V. Pantuev , V. Papavassiliou , S. Park , S. F. Pate , L. Patel , M. Patel , J. -C. Peng , W. Peng , D. V. Perepelitsa , G. D. N. Perera , D. Yu. Peressounko , C. E. PerezLara , J. Perry , R. Petti , C. Pinkenburg , R. Pinson , R. P. Pisani , A. Pun , M. L. Purschke , P. V. Radzevich , J. Rak , N. Ramasubramanian , I. Ravinovich , K. F. Read , D. Reynolds , V. Riabov , Y. Riabov , D. Richford , T. Rinn , N. Riveli , D. Roach , S. D. Rolnick , M. Rosati , Z. Rowan , J. G. Rubin , J. Runchey , N. Saito , T. Sakaguchi , H. Sako , V. Samsonov , M. Sarsour , S. Sato , S. Sawada , B. Schaefer , B. K. Schmoll , K. Sedgwick , J. Seele , R. Seidl , A. Sen , R. Seto , P. Sett , A. Sexton , D. Sharma , I. Shein , T. -A. Shibata , K. Shigaki , M. Shimomura , P. Shukla , A. Sickles , C. L. Silva , D. Silvermyr , B. K. Singh , C. P. Singh , V. Singh , M. Slunečka , K. L. Smith , R. A. Soltz , W. E. Sondheim , S. P. Sorensen , I. V. Sourikova , P. W. Stankus , M. Stepanov , S. P. Stoll , T. Sugitate , A. Sukhanov , T. Sumita , J. Sun , X. Sun , Z. Sun , J. Sziklai , A. Takahara , A. Taketani , K. Tanida , M. J. Tannenbaum , S. Tarafdar , A. Taranenko , A. Timilsina , T. Todoroki , M. Tomášek , H. Torii , M. Towell , R. Towell , R. S. Towell , I. Tserruya , Y. Ueda , B. Ujvari , H. W. van Hecke , M. Vargyas , J. Velkovska , M. Virius , V. Vrba , E. Vznuzdaev , X. R. Wang , D. Watanabe , Y. Watanabe , Y. S. Watanabe , F. Wei , S. Whitaker , S. Wolin , C. P. Wong , C. L. Woody , Y. Wu , M. Wysocki , B. Xia , Q. Xu , L. Xue , S. Yalcin , Y. L. Yamaguchi , A. Yanovich , I. Yoon , I. Younus , I. E. Yushmanov , W. A. Zajc , A. Zelenski , Y. Zhai , S. Zharko , L. Zou

Spin asymmetries from Non Standard Physics with polarized proton beams at RHIC

A new handed interaction between quarks could be at the origin of some small parity violating effects in the inclusive production of one-jet in polarized $pp$ collisions. This interaction could originate from compositeness or from the…

High Energy Physics - Phenomenology · Physics 2007-05-23 P. Taxil , J. -M. Virey

The Strange Quark Polarisation from Charged Kaon Production on Deuterons

The strange quark helicity distribution Delta s(x)is derived at LO from the semi-inclusive and inclusive spin asymmetries measured by the COMPASS experiment at CERN. The significance of the results is found to depend critically on the ratio…

High Energy Physics - Experiment · Physics 2009-08-24 R. Windmolders

Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target

Single-spin asymmetries for semi-inclusive electroproduction of charged pions in deep-inelastic scattering of positrons are measured for the first time with transverse target polarization. The asymmetry depends on the azimuthal angles of…

High Energy Physics - Experiment · Physics 2012-08-27 The HERMES Collaboration