Related papers: Spin physics in deep inelastic scattering: Summary

Hadronization mechanisms and spin effects in high energy fragmentation processes

Spin effects in high energy fragmentation processes can provide us with important information on hadronization mechanisms and spin structure of hadrons. It can in particular give new tests to the hadronization models. In this talk, we make…

High Energy Physics - Phenomenology · Physics 2007-05-23 Liang Zuo-tang

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

The problem of the spin of the proton and elastic neutrino-proton scattering

Talk presented by S.M. Bilenky at the Adriatico Research Conference on "Trends in Collider Spin Physics", ICTP, Trieste, December 1995.

High Energy Physics - Phenomenology · Physics 2007-05-23 S. M. Bilenky , W. M. Alberico , C. Giunti , C. Maieron

Relation between transition density and proton inelastic scattering by $^{12}$C target at $E_p =$ 65 and 200 MeV

We calculate proton elastic and inelastic scatterings with a microscopic coupled channel (MCC) calculation. The localized diagonal and coupling potentials including the spin-orbit part are obtained by folding a complex $G$-matrix effective…

Nuclear Theory · Physics 2021-04-07 T. Furumoto , M. Takashina

Conceptual design of the Spin Physics Detector

The Spin Physics Detector, a universal facility for studying the nucleon spin structure and other spin-related phenomena with polarized proton and deuteron beams, is proposed to be placed in one of the two interaction points of the NICA…

High Energy Physics - Experiment · Physics 2022-02-04 V. M. Abazov , V. Abramov , L. G. Afanasyev , R. R. Akhunzyanov , A. V. Akindinov , N. Akopov , I. G. Alekseev , A. M. Aleshko , V. Yu. Alexakhin , G. D. Alexeev , M. Alexeev , A. Amoroso , I. V. Anikin , V. F. Andreev , V. A. Anosov , A. B. Arbuzov , N. I. Azorskiy , A. A. Baldin , V. V. Balandina , E. G. Baldina , M. Yu. Barabanov , S. G. Barsov , V. A. Baskov , A. N. Beloborodov , I. N. Belov , A. P. Belova , A. V. Belyaev , A. Ya. Berdnikov , Ya. A. Berdnikov , A. V. Berezhnoy , V. V. Bleko , A. V. Bobkov , D. N. Bogoslovsky , I. N. Boguslavsky , E. V. Boltushkin , E. E. Boos , V. E. Burtsev , Lei Chen , A. S. Chepurnov , M. Chiosso , A. Chumakov , O. D. Dalkarov , A. Datta , E. I. Demikhov , I. I. Denisenko , O. Yu. Denisov , V. N. Duginov , V. B. Dunin , K. Dygnarowicz , A. V. Efremov , R. El-Kholy , D. A. Eliseev , T. L. Enik , O. L. Fedin , G. A. Feofilov , Yu. N. Filatov , M. Finger , M. Finger , V. N. Frolov , G. Galinski , A. S. Galoyan , C. E Garsia Trapaga , O. P. Gavrishchuk , S. G. Gerasimov , L. Glonti , S. V. Goloskokov , G. A. Golovanov , A. A. Golubev , Golubykh S. M. , Goncharov P. V. , Grafov N. O. , Gribkov D. Y. , A. S. Gribovsky , A. O. Gridin , B. V. Grinyov , K. I. Gritsay , S. A. Gromov , V. A. Gromov , Yu. V. Gurchin , Yu. V. Gusakov , A. V. Guskov , F. Guzman , J. Haidenbauer , M. Havranek , A. V. Ivanov , N. Ya. Ivanov , A. Yu. Isupov , V. Jary , Shi-Hai Jia , D. Jokovic , A. Kaplii , A. V. Karpishkov , E. A. Kasianova , G. D. Kekelidze , S. V. Khabarov , P. R. Kharusov , A. N. Khrenov , V. T. Kim , N. V. Kirichkov , D. Yu. Kirin , I. Kishchin , A. Klekotko , Ya. Klopot , A. Kluev , E. S. Kokoulina , V. I. Komarov , A. M. Kondratenko , M. A. Kondratenko , I. Konorov , Yu. A. Kopylov , M. V. Korjik , P. S. Korovkin , A. Yu. Korzenev , E. V. Kostukov , A. Kotzinian , A. D. Kovalenko , V. N. Kovalenko , Kozhin M. A. , V. A. Kramarenko , V. N. Kruglov , A. Kubankin , Yu. Kubankin , S. Kuleshov , V. E. Kovtun , A. V. Kulikov , V. S. Kurbatov , R. Kurjata , S. A. Kutuzov , E. V. Kuznetsova , E. A. Ladygin , V. P. Ladygin , D. M. Larionova , D. Lednicky , R. Lednicky , Pei-Yu Li , Xiao-Mei Li , A. S. Lobko , E. Luschevskaya , A. I. L'vov , V. N. Lyashchenko , V. M. Lysan , V. Lyubovitskij , A. Maggiora , V. P. Maleev , A. Maltsev , T. V. Malykhina , A. M. Makankin , V. V. Makarenko , D. Maletic , D. B. Malkevich , M. Marcisovsky , E. V. Martovitsky , J. Marzec , M. M. Merkin , G. V. Meshcheriakov , Yu. M. Mitrankov , M. M. Mitrankova , E. O. Mitrofanov , B. Morozov , I. V. Moshkovsky , A. Movsisyan , S. N. Nagorniy , P. Yu. Nechaeva , M. A. Nefedov , Yu. A. Nefedov , M. A. Negodaev , G. Neue , D. N. Nikiforov , V. A. Nikitin , A. S. Nikolaev , D. A. Oleynik , G. A. Ososkov , D. Panzieri , B. Parsamyan , S. S. Parzhitsky , G. Pastuszak , V. V. Pavlov , A. A. Pavlova , I. S. Pelevanyuk , E. E. Perepelkin , D. V. Peshekhonov , A. Sh. Petrosyan , A. A. Piskun , V. V. Plotnikov , D. V. Podgainy , P. Polozov , R. V. Polyakova , V. V. Polyansky , V. V. Popov , J. Popule , I. Prochazka , I. K. Prokhorov , S. N. Reva , S. G. Reznikov , E. P. Rezvaya , J. -M. Richard , O. V. Rogachevsky , V. M. Romanov , A. I. Rudenko , M. A. Rumyantsev , V. Rusinov , N. A. Rybakov , A. Rychter , A. Rymbekova , A. B. Safonov , K. M. Salamatin , V. A. Saleev , A. G. Samartsev , A. A. Savenkov , M. Savic , A. A. Semak , V. N. Shaikovsky , A. A. Shavrin , A. I. Sheremeteva , S. S. Shimanskii , A. V. Shipilova , K. Shtejer , R. Shulyakovsky , A. A. Sinitsa , N. B. Skachkov , A. N. Skachkova , M. Slunecka , V. Sluneckova , A. A. Solin , A. V. Solin , Jin-Xin Song , V. V. Sotnikov , Peng-Fei Sun , S. Yu. Starikova , A. V. Stavinskiy , E. A. Streletskaya , M. Strikman , D. Strusik-Kotlozh , S. I. Suchkov , R. I. Sultanov , Hao Sun , D. N. Svirida , O. G. Tarasov , E. I. Tarkovskyi , A. Temerbayev , A. A. Terekhin , Tereschenko V. V. , Terkulov A. R. , Teryaev O. V. , Tishevsky A. V. , Tkachenko A. V. , A. A. V. V. Tokmenin , L. Tomasek , E. Tomasi-Gustafsson , N. P. Topchiev , N. D. Topilin , B. L. Topko , F. Tosello , A. Trifonov , Yu. A. Troyan. , N. O. Trunov , R. Tsenov , E. A. Usenko , V. V. Uzhinsky , Yu. N. Uzikov , F. F. Valiev , E. V. Vasilieva , V. V. Vechernin , A. Yu. Verkheev , L. S. Vertogradov , Yu. L. Vertogradova , V. A. Vesenkov , M. Virius , N. I. Volchansky , I. S. Volkov , P. V. Volkov , A. Vorobiev , V. Vrba , Qian Wang , I. P. Yudin , J. Zamora , N. I. Zamyatin , K. Zaremba , A. V. Zelenov , E. V. Zemlyanichkina , Yun-Yu Zhang , Jun-Wei Zhang , Ming-Rui Zhao , Qiang Zhao , Yu Zhi , A. S. Zhemchugov , A. Zhevlakov , N. M. Zhigareva , P. N. Zhmurin , I. A. Zhukov , N. I Zhuravlev. , M. Ziembicki , A. V. Zinin , E. V. Zubarev , M. I. Zuev

Spin Structure of the Proton

By assuming that there is no significant intrinsic polarization of the gluon, we have computed the polarized quark contributions to the proton's spin under SU(3) flavor symmetry breaking for the polarized sea and have performed a global…

High Energy Physics - Phenomenology · Physics 2009-10-28 Chung-Yi Wu

Measurement of the Neutron Spin Structure Function $g_1^n$ with a Polarized ^3He Target

Results are reported from the HERMES experiment at HERA on a measurement of the neutron spin structure function $g_1^n(x,Q^2)$ in deep inelastic scattering using 27.5 GeV longitudinally polarized positrons incident on a polarized $^3$He…

High Energy Physics - Experiment · Physics 2008-11-26 The HERMES Collaboration , K. Ackerstaff

Melosh rotation: source of the proton's missing spin

It is shown that the observed small value of the integrated spin structure function for protons could be naturally understood within the naive quark model by considering the effect from Melosh rotation. The key to this problem lies in the…

High Energy Physics - Phenomenology · Physics 2010-04-15 Bo-Qiang Ma

Determination of the Proton Spin Structure Functions for 0.05 < Q^2 < 5 GeV^2 using CLAS

We present the results of our final analysis of the full data set of g_1^p(Q^2), the spin structure function of the proton, collected using CLAS at Jefferson Lab in 2000-2001. Polarized electrons with energies of 1.6, 2.5, 4.2 and 5.7 GeV…

Nuclear Experiment · Physics 2018-01-15 Robert Fersch , Nevzat Guler , Peter Bosted , Alexandre Deur , Keith Griffioen , Christopher Keith , Sebastian Kuhn , Ralph Minehart , Yelena Prok , The CLAS Collaboration

Electromagnetic form factors and polarizations of non-Dirac particles with rest spin 1/2

We consider one aspect of the theoretical foundations of polarization experiments on elastic scattering of electrons on protons yielding form factor ratios incompatible with those that are extracted from nonpolarization experiments. We…

High Energy Physics - Phenomenology · Physics 2010-04-21 L. M. Slad

A Study of Nucleon Spin Struture from Quantum Chromodynamics

I present an introduction to the field of Quantum Chromodynamics (QCD) with emphasis on nucleon spin structure and perturbative methods. After a somewhat comprehensive overview of perturbative QCD, including the systematics of…

High Energy Physics - Phenomenology · Physics 2007-05-23 Jonathan Osborne

Polarizability of the Nucleon and Compton Scattering

Different approaches to describe Compton scattering and the polarizability of the nucleon have been discussed up to now. We show that the most appropriate ones are provided by non-subtracted dispersion theories of the fixed-$t$ and…

High Energy Physics - Phenomenology · Physics 2013-06-26 Martin Schumacher

Neutron Spin Structure from e-3He Scattering with Double Spectator Tagging at the Electron-Ion Collider

The spin structure function of the neutron is traditionally determined by measuring the spin asymmetry of inclusive electron deep inelastic scattering (DIS) off polarized3He nuclei. In such experiments, nuclear effects can lead to large…

Nuclear Experiment · Physics 2021-10-22 Ivica Friscic , Dien Nguyen , Jackson Pybus , Alex Jentsch , Efrain Segarra , Mark Baker , Or Hen , Douglas Higinbotham , Richard Milner , Arun Tadepalli , Zhoudunming Tu , Jennifer Rittenhouse West

Polarised parton distributions

We analyze spin dependent parton distributions consistent with the most recent measurements of the spin dependent deep inelastic scattering structure functions and obtained in the framework of the spin dilution model. Predictions for the…

High Energy Physics - Phenomenology · Physics 2009-10-28 D. de Florian , L. N. Epele , H. Fanchiotti , C. A. Garcia Canal , R. Sassot

QCD and the Structure of the Nucleon in Electron Scattering

The internal structure of the nucleon is discussed within the context of QCD. Recent progress in understanding the distribution of flavor and spin in the nucleon is reviewed, and prospects for extending our knowledge of nucleon structure in…

High Energy Physics - Phenomenology · Physics 2017-08-23 W. Melnitchouk

Spin entanglement in neutron-proton scattering

In this Letter, I work out spin entanglement properties of neutron-proton scattering using the exact S-matrix, generalizing previous works based on S wave. The dependence of spin entanglement on momentum, scattering angle, and initial spin…

Nuclear Theory · Physics 2023-06-09 Dong Bai

Spin and orbital angular momentum of the proton

Since the announcement of the proton spin crisis by the European Muon Collaboration there has been considerable progress in unravelling the distribution of spin and orbital angular momentum within the proton. We review the current status of…

High Energy Physics - Phenomenology · Physics 2009-08-03 A. W. Thomas

Delineating the polarized and unpolarized partonic structure of the nucleon

Reports on our latest extractions of parton distribution functions of the nucleon are given. First an overview of the recent JR14 upgrade of our unpolarized PDFs, including NNLO determinations of the strong coupling constant and a…

High Energy Physics - Phenomenology · Physics 2015-06-23 Pedro Jimenez-Delgado

Measurement of the generalized spin polarizabilities of the neutron in the low $Q^2$ region

Understanding the nucleon spin structure in the regime where the strong interaction becomes truly strong poses a challenge to both experiment and theory. At energy scales below the nucleon mass of about 1 GeV, the intense interaction among…

Nuclear Experiment · Physics 2022-02-25 V. Sulkosky , C. Peng , J. -P. Chen , A. Deur , S. Abrahamyan , K. A. Aniol , D. S. Armstrong , T. Averett , S. L. Bailey , A. Beck , P. Bertin , F. Butaru , W. Boeglin , A. Camsonne , G. D. Cates , C. C. Chang , Seonho Choi , E. Chudakov , L. Coman , J. C Cornejo , B. Craver , F. Cusanno , R. De Leo , C. W. de Jager , J. D. Denton , S. Dhamija , R. Feuerbach , J. M. Finn , S. Frullani , K. Fuoti , H. Gao , F. Garibaldi , O. Gayou , R. Gilman , A. Glamazdin , C. Glashausser , J. Gomez , J. -O. Hansen , D. Hayes , B. Hersman , D. W. Higinbotham , T. Holmstrom , T. B. Humensky , C. E. Hyde , H. Ibrahim , M. Iodice , X. Jiang , L. J. Kaufman , A. Kelleher , K. E. Keister , W. Kim , A. Kolarkar , N. Kolb , W. Korsch , K. Kramer , G. Kumbartzki , L. Lagamba , V. Laine , G. Laveissiere , J. J. Lerose , D. Lhuillier , R. Lindgren , N. Liyanage , H. -J. Lu , B. Ma , D. J. Margaziotis , P. Markowitz , K. McCormick , M. Meziane , Z. -E. Meziani , R. Michaels , B. Moffit , P. Monaghan , S. Nanda , J. Niedziela , M. Niskin , R. Pandolfi , K. D. Paschke , M. Potokar , A. Puckett , V. A. Punjabi , Y. Qiang , R. Ransome , B. Reitz , R. Roche , A. Saha , A. Shabetai , S. Sirca , J. T. Singh , K. Slifer , R. Snyder , P. Solvignon , R. Stringer , R. Subedi , W. A. Tobias , N. Ton , P. E. Ulmer , G. M. Urciuoli , A. Vacheret , E. Voutier , K. Wang , L. Wan , B. Wojtsekhowski , S. Woo , H. Yao , J. Yuan , X. Zhan , X. Zheng , L. Zhu

The Spin Structure of the Proton

It is shown that the proton "spin crisis'' or "spin puzzle" can be understood by the relativistic effect of quark transversal motions due to the Melosh-Wigner rotation. The quark helicity $\Delta q$ measured in polarized deep inelastic…

High Energy Physics - Phenomenology · Physics 2011-04-15 Bo-Qiang Ma