Related papers: Proton Spin Structure in the Resonance Region

On The $Q^2$ Dependence of The Spin Structure Function In The Resonance Region

In this paper, we show what we can learn from the CEBAF experiments on spin-structure functions, and the transition from the Drell-Hearn-Gerasimov sum rule in the real photon limit to the spin dependent sum rules in the deep inelastic…

High Energy Physics - Phenomenology · Physics 2009-10-28 Zhenping Li , Zhujun Li

Proton and neutron polarized structure functions from low to high Q**2

Phenomenological parameterizations of proton and neutron polarized structure functions, g1p and g1n, are developed for x > 0.02 using deep inelastic data up to ~ 50 (GeV/c)**2 as well as available experimental results on photo- and…

Nuclear Theory · Physics 2017-08-23 S. Simula , M. Osipenko , G. Ricco , M. Taiuti

The Spin Structure of the Nucleon

We review the present understanding of the spin structure of protons and neutrons, the fundamental building blocks of nuclei collectively known as nucleons. The field of nucleon spin provides a critical window for testing Quantum…

High Energy Physics - Phenomenology · Physics 2026-01-13 A. Deur , S. J. Brodsky , G. F. de Teramond

Hermes and the spin of the proton

HERMES is a second generation experiment to study the spin structure of the nucleon, in which measurements of the spin dependent properties of semi-inclusive deep-inelastic lepton scattering are emphasized. Data have been accumulated for…

High Energy Physics - Experiment · Physics 2014-11-17 H. E. Jackson

Spin Physics at J-PARC

Spin-physics projects at J-PARC are explained by including future possibilities. J-PARC is the most-intense hadron-beam facility in the high-energy region above multi-GeV, and spin physics will be investigated by using secondary beams of…

High Energy Physics - Phenomenology · Physics 2016-03-23 S. Kumano

Measurement of the Analyzing Power $A_N$ in $pp$ Elastic Scattering in the CNI Region with a Polarized Atomic Hydrogen Gas Jet Target

A precise measurement of the analyzing power $A_N$ in proton-proton elastic scattering in the region of 4-momentum transfer squared $0.001 < |t| < 0.032 ({\rm GeV}/c)^2$ has been performed using a polarized atomic hydrogen gas jet target…

High Energy Physics - Experiment · Physics 2007-05-23 H. Okada , I. G. Alekseev , A. Bravar , G. Bunce , S. Dhawan , R. Gill , W. Haeberli , O. Jinnouchi , A. Khodinov , Y. Makdisi , A. Nass , N. Saito , E. J. Stephenson , D. N. Svirida , T. Wise , A. Zelenski

In Search of the Quark Spins in the Nucleon: A Next--to--Next--to-- Leading Order QCD Analysis

The data from the last seven experiments performed on polarized deep--inelastic scattering on proton and neutron (or deuteron) targets have been analyzed in search of a precise determination of the spin fraction carried by the quarks in the…

High Energy Physics - Phenomenology · Physics 2008-02-03 Paolo M. Gensini

Parity-Violating Inelastic Electron-Proton Scattering at Low $Q^2$ Above the Resonance Region

We report the measurement of the parity-violating asymmetry for the inelastic scattering of electrons from the proton, at $Q^2 = 0.082$ GeV$^2$ and $ W = 2.23$ GeV, above the resonance region. The result $A_{\rm Inel} = - 13.5 \pm 2.0 ({\rm…

Nuclear Experiment · Physics 2020-05-13 QWeak Collaboration , D. Androic , D. S. Armstrong , A. Asaturyan , K. Bartlett , R. S. Beminiwattha , J. Benesch , F. Benmokhtar , J. Birchall , R. D. Carlini , J. C. Cornejo , M. M. Dalton , C. A. Davis , W. Deconinck , J. F. Dowd , J. A. Dunne , D. Dutta , W. S. Duvall , W. R. Falk , J. M. Finn , C. Gal , D. Gaskell , M. T. W. Gericke , J. Grames , F. Guo , J. R. Hoskins , D. Jones , M. K. Jones , R. Jones , M. Kargiantoulakis , P. M. King , E. Korkmaz , S. Kowalski , J. Leacock , A. R. Lee , J. H. Lee , L. Lee , S. MacEwan , D. Mack , J. A. Magee , J. Mammei , J. W. Martin , M. J. McHugh , D. Meekins , K. E. Mesick , R. Michaels , A. Micherdzinska , A. Mkrtchyan , H. Mkrtchyan , N. Morgan , A. Narayan , V. Nelyubin , W. T. H van Oers , V. F. Owen , S. A. Page , J. Pan , K. D. Paschke , S. K. Phillips , M. L. Pitt , R. W. Radloff , W. D. Ramsay , J. Roche , B. Sawatzky , T. Seva , M. H. Shabestari , R. Silwal , N. Simicevic , G. R. Smith , P. Solvignon , D. T. Spayde , A. Subedi , V. Tadevosyan , B. Waidyawansa , P. Wang , S. P. Wells , S. A. Wood , P. Zang

Spin structure of nucleon and spin transfer in high energy fragmentation process

Spin transfer in high energy fragmentation process is determined by the hadronization mechanism and spin structure of hadrons.It can be studied by measuring the polarizations of hyperons and/or vector mesons in e+e- annihilation, in the…

High Energy Physics - Phenomenology · Physics 2009-11-10 Zuo-Tang Liang

Low Q^2 Structure Function Measurements

New Results on the measurement of the proton structure function F_2(x,Q^2) are reported for momentum transfers squared Q^2 >= 1.5 GeV^2 and Bjorken x >= 3.5 10^{-5} using data collected by the HERA experiments H1 and ZEUS in 1994. F_2…

High Energy Physics - Experiment · Physics 2007-05-23 Gregorio Bernardi

Measurement of Spin Correlation Parameters A$_{NN}$, A$_{SS}$, and A_${SL}$ at 2.1 GeV in Proton-Proton Elastic Scattering

At the Cooler Synchrotron COSY/J\"ulich spin correlation parameters in elastic proton-proton (pp) scattering have been measured with a 2.11 GeV polarized proton beam and a polarized hydrogen atomic beam target. We report results for…

Nuclear Experiment · Physics 2009-11-07 F. Bauer , J. Bisplinghoff , K. Büßer , M. Busch , T. Colberg , L. Demirörs , C. Dahl , P. D. Eversheim , O. Eyser , O. Felden , R. Gebel , J. Greiff , R. Groß-Hardt , F. Hinterberger , R. Jahn , E. Jonas , H. Krause , C. Lehmann , J. Lindlein , R. Maier , A. Meinerzhagen , C. Pauly , D. Prasuhn , H. Rohdjeß , D. Rosendaal , P. von Rossen , N. Schirm , W. Scobel , K. Ulbrich , E. Weise , T. Wolf , R. Ziegler

Resonance contributions to nucleon spin structure in Holographic QCD

We study polarized inelastic electron-nucleon scattering at low momentum transfer in the Witten-Sakai-Sugimoto model of holographic QCD, focusing on resonance production contributions to the nucleon spin structure functions. Our analysis…

High Energy Physics - Phenomenology · Physics 2023-10-05 Francesco Bigazzi , Federico Castellani

Measurement of the Proton Structure Function F2 and of the Total Photon-Proton Cross Section sigma(tot) at Very Low Q2 and Very Low x

The proton structure function F2 has been measured in the range 0.045 GeV2 < Q2 < 0.65 GeV2 and 6*10**-7 < x < 1*10**-3 using 3.9 pb-1 of ep->eX reactions recorded with the ZEUS detector in 1997. The analysis is based on data from the Beam…

High Energy Physics - Experiment · Physics 2019-08-14 Christoph Amelung

Transverse Beam Spin Asymmetries at Backward Angles in Elastic Electron-Proton and Quasi-elastic Electron-Deuteron Scattering

We have measured the beam-normal single-spin asymmetries in elastic scattering of transversely polarized electrons from the proton, and performed the first measurement in quasi-elastic scattering on the deuteron, at backward angles (lab…

Nuclear Experiment · Physics 2011-07-28 The G0 Collaboration , D. Androić , D. S. Armstrong , J. Arvieux , S. L. Bailey , D. H. Beck , E. J. Beise , J. Benesch , F. Benmokhtar , L. Bimbot , J. Birchall , P. Bosted , H. Breuer , C. L. Capuano , Y. -C. Chao , A. Coppens , C. A. Davis , C. Ellis , G. Flores , G. Franklin , C. Furget , D. Gaskell , M. T. W. Gericke , J. Grames , G. Guillard , J. Hansknecht , T. Horn , M. K. Jones , P. M. King , W. Korsch , S. Kox , L. Lee , J. Liu , A. Lung , J. Mammei , J. W. Martin , R. D. McKeown , A. Micherdzinska , M. Mihovilovic , H. Mkrtchyan , M. Muether , S. A. Page , V. Papavassiliou , S. F. Pate , 10 S. K. Phillips , P. Pillot , M. L. Pitt , M. Poelker , B. Quinn , W. D. Ramsay , J. -S. Real , J. Roche , P. Roos , J. Schaub , T. Seva , N. Simicevic , G. R. Smith , D. T. Spayde , M. Stutzman , R. Suleiman , V. Tadevosyan , W. T. H. van Oers , M. Versteegen , E. Voutier , W. Vulcan , S. P. Wells , S. E. Williamson , S. A. Wood , B. Pasquini , M. Vanderhaeghen

Resonant contributions to inclusive nucleon structure functions from exclusive meson electroproduction data

Nucleon resonance contributions to the inclusive proton $F_2$ and $F_L$ structure functions are computed from resonance electroexcitation amplitudes in the mass range up to 1.75 GeV extracted from CLAS exclusive meson electroproduction…

High Energy Physics - Phenomenology · Physics 2021-08-11 A. N. Hiller Blin , W. Melnitchouk , V. I. Mokeev , V. D. Burkert , V. V. Chesnokov , A. Pilloni , A. P. Szczepaniak

Study of Single-Spin Asymmetry in Diffractive High- $p_t$-Jet Production

It is shown that the transverse single spin asymmetry in polarized diffractive $Q \bar Q$ production depends strongly on the spin structure of the pomeron coupling. It is concluded that the spin properties of quark-pomeron and…

High Energy Physics - Phenomenology · Physics 2007-05-23 S. V. Goloskokov

Nucleon structure and spin effects in elastic hadron scattering

Soft diffraction phenomena in elastic nucleon scattering are considered from the viewpoint of the spin dependence of the interaction potential. Spin-dependent pomeron effects are analyzed for elastic $pp$ scattering, spin-dependent…

High Energy Physics - Phenomenology · Physics 2021-05-05 O. V. Selyugin

Measurement of charged pion double spin asymmetries at midrapidity in longitudinally polarized $p$$+$$p$ collisions at $\sqrt{s}=510$ GeV

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the longitudinal double spin asymmetries, $A_{LL}$, for charged pions at midrapidity ($|\eta|<0.35$) in longitudinally polarized $p$$+$$p$ collisions at…

High Energy Physics - Experiment · Physics 2020-08-07 U. A. 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 , D. Black , J. S. Bok , 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 , T. W. Danley , 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. Fitzgerald , S. L. Fokin , J. E. Frantz , A. Franz , A. D. Frawley , C. Gal , P. Gallus , E. A. Gamez , 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 , T. O. S. Haseler , X. He , T. K. Hemmick , J. C. Hill , K. 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 , S. Ishimaru , 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 , A. Lebedev , K. B. Lee , S. H. Lee , M. J. Leitch , M. Leitgab , Y. H. Leung , 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 , G. Mitsuka , 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 , K. Nagashima , J. L. Nagle , M. I. Nagy , I. Nakagawa , H. Nakagomi , K. Nakano , C. Nattrass , S. Nelson , P. K. Netrakanti , M. Nihashi , T. Niida , R. Nishitani , R. Nouicer , T. Novák , 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 , C. Y. Scarlett , 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 , S. Suzuki , J. Sziklai , A. Takahara , A. Taketani , K. Tanida , M. J. Tannenbaum , S. Tarafdar , A. Taranenko , R. Tieulent , 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 , Z. 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 , J. H. Yoo , I. Yoon , I. Younus , H. Yu , I. E. Yushmanov , W. A. Zajc , A. Zelenski , Y. Zhai , S. Zharko , L. Zou

Near Threshold Neutral Pion Electroproduction at High Momentum Transfers and Generalized Form Factors

We report the measurement of near threshold neutral pion electroproduction cross sections and the extraction of the associated structure functions on the proton in the kinematic range $Q^2$ from 2 to 4.5 GeV$^2$ and $W$ from 1.08 to 1.16…

Nuclear Experiment · Physics 2013-04-22 P. Khetarpal , P. Stoler , I. G. Aznauryan , V. Kubarovsky , K. P. Adhikari , D. Adikaram , M. Aghasyan , M. J. Amaryan , M. D. Anderson , S. Anefalos Pereira , M. Anghinolfi , H. Avakian , H. Baghdasaryan , J. Ball , N. A. Baltzell , M. Battaglieri , V. Batourine , I. Bedlinskiy , A. S. Biselli , J. Bono , S. Boiarinov , W. J. Briscoe , W. K. Brooks , V. D. Burkert , D. S. Carman , A. Celentano , G. Charles , P. L. Cole , M. Contalbrigo , V. Crede , A. D'Angelo , N. Dashyan , R. De Vita , E. De Sanctis , A. Deur , C. Djalali , D. Doughty , M. Dugger , R. Dupre , H. Egiyan , A. El Alaoui , L. El Fassi , P. Eugenio , G. Fedotov , S. Fegan , R. Fersch , J. A. Fleming , A. Fradi , M. Y. Gabrielyan , M. Garçon , N. Gevorgyan , G. P. Gilfoyle , K. L. Giovanetti , F. X. Girod , J. T. Goetz , W. Gohn , E. Golovatch , R. W. Gothe , K. A. Griffioen , B. Guegan , M. Guidal , L. Guo , K. Hafidi , H. Hakobyan , C. Hanretty , N. Harrison , K. Hicks , D. Ho , M. Holtrop , C. E. Hyde , Y. Ilieva , D. G. Ireland , B. S. Ishkhanov , E. L. Isupov , H. S. Jo , K. Joo , D. Keller , M. Khandaker , A. Kim , W. Kim , F. J. Klein , S. Koirala , A. Kubarovsky , S. V. Kuleshov , N. D. Kvaltine , S. Lewis , K. Livingston , H. Y. Lu , I. J. D. MacGregor , Y. Mao , D. Martinez , M. Mayer , B. McKinnon , C. A. Meyer , T. Mineeva , M. Mirazita , V. Mokeev , R. A. Montgomery , H. Moutarde , E. Munevar , C. Munoz Camacho , P. Nadel-Turonski , R. Nasseripour , S. Niccolai , G. Niculescu , I. Niculescu , M. Osipenko , A. I. Ostrovidov , L. L. Pappalardo , R. Paremuzyan , K. Park , S. Park , E. Pasyuk , E. Phelps , J. J. Phillips , S. Pisano , O. Pogorelko , S. Pozdniakov , J. W. Price , S. Procureur , D. Protopopescu , A. J. R. Puckett , B. A. Raue , G. Ricco , D. Rimal , M. Ripani , G. Rosner , P. Rossi , F. Sabatié , M. S. Saini , C. Salgado , N. A. Saylor , D. Schott , R. A. Schumacher , E. Seder , H. Seraydaryan , Y. G. Sharabian , G. D. Smith , D. I. Sober , D. Sokhan , S. S. Stepanyan , S. Stepanyan , I. I. Strakovsky , S. Strauch , M. Taiuti , W. Tang , C. E. Taylor , S. Tkachenko , M. Ungaro , B. Vernarsky , H. Voskanyan , E. Voutier , N. K. Walford , L. B. Weinstein , D. P. Weygand , M. H. Wood , N. Zachariou , J. Zhang , Z. W. Zhao , I. Zonta

Spin Physics at COMPASS

The COMPASS experiment is a fixed target experiment at the CERN SPS using muon and hadron beams for the investigation of the spin structure of the nucleon and hadron spectroscopy. The main objective of the muon physics program is the study…

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