Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'506'133
Articles rated: 2609

28 April 2024

» arxiv » 2102.07419

Article overview

Measurement of deeply virtual Compton scattering off Helium-4 with CLAS at Jefferson Lab
R. Dupré ; M. Hattawy ; N.A. Baltzell ; S. Bültmann ; R. De Vita ; A. El Alaoui ; L. El Fassi ; H. Egiyan ; F.X. Girod ; M. Guidal ; K. Hafidi ; D. Jenkins ; S. Liuti ; Y. Perrin ; S. Stepanyan ; B. Torayev ; E. Voutier ; M.J. Amaryan ; W.R. Armstrong ; H. Atac ; C. Ayerbe Gayoso ; L. Barion ; M. Battaglieri ; I. Bedlinskiy ; F. Benmokhtar ; A. Bianconi ; A.S. Biselli ; M. Bondi ; F. Bossù ; S. Boiarinov ; W.J. Briscoe ; D. Bulumulla ; V. Burkert ; D.S. Carman ; J.C. Carvajal ; M. Caudron ; A. Celentano ; P. Chatagnon ; V. Chesnokov ; T. Chetry ; G. Ciullo ; B.A. Clary ; P.L. Cole ; M. Contalbrigo ; G. Costantini ; V. Crede ; A. D'Angelo ; N. Dashyan ; M. Defurne ; A. Deur ; S. Diehl ; C. Djalali ; M. Ehrhart ; L. Elouadrhiri ; P. Eugenio ; S. Fegan ; A. Filippi ; T.A. Forest ; Y. Ghandilyan ; G.P. Gilfoyle ; R.W. Gothe ; K.A. Griffioen ; H. Hakobyan ; T.B. Hayward ; K. Hicks ; A. Hobart ; M. Holtrop ; Y. Ilieva ; D.G. Ireland ; E.L. Isupov ; H.S. Jo ; K. Joo ; S. Joosten ; D. Keller ; G. Khachatryan ; A. Khanal ; M. Khandaker ; A. Kim ; W. Kim ; A. Kripko ; V. Kubarovsky ; S.E. Kuhn ; L. Lanza ; K. Livingston ; M.L. Kabir ; M. Leali ; P. Lenisa ; I.J.D. MacGregor ; D. Marchand ; N. Markov ; V. Mascagna ; M. Mayer ; B. McKinnon ; M. Mirazita ; V.I. Mokeev ; K. Neupane ; S. Niccolai ; T. R. O'Connell ; M. Osipenko ; M. Paolone ; L.L. Pappalardo ; R. Paremuzyan ; E. Pasyuk ; D. Payette ; W. Phelps ; N. Pivnyuk ; O. Pogorelko ; J. Poudel ; Y. Prok ; M. Ripani ; J. Ritman ; A. Rizzo ; G. Rosner ; P. Rossi ; J. Rowley ; F. Sabatié ; C. Salgado ; A. Schmidt ; R. Schumacher ; V. Sergeyeva ; Y. Sharabian ; U. Shrestha ; D. Sokhan ; O. Soto ; N. Sparveris ; I.I. Strakovsky ; S. Strauch ; N. Tyler ; M. Ungaro ; L. Venturelli ; H. Voskanyan ; A. Vossen ; D. Watts ; K. Wei ; X. Wei ; L.B. Weinstein ; R. Wishart ; M.H. Wood ; B. Yale ; N. Zachariou ; J. Zhang ;
Date:	15 Feb 2021
Abstract:	We report on the measurement of the beam spin asymmetry in the deeply virtual Compton scattering off $^4$He using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab using a 6 GeV longitudinally polarized electron beam incident on a pressurized $^4$He gaseous target. We detail the method used to ensure the exclusivity of the measured reactions, in particular the upgrade of CLAS with a radial time projection chamber to detect the low-energy recoiling $^4$He nuclei and an inner calorimeter to extend the photon detection acceptance at forward angles. Our results confirm the theoretically predicted enhancement of the coherent ($e^4$He$~ o~e’$$^4$He$’gamma’$) beam spin asymmetries compared to those observed on the free proton, while the incoherent ($e^4$He$~ o~e’$p$’gamma’$X$’$) asymmetries exhibit a 30$\%$ suppression. From the coherent data, we were able to extract, in a model-independent way, the real and imaginary parts of the only $^4$He Compton form factor, $cal H_A$, leading the way toward 3D imaging of the partonic structure of nuclei.
Source:	arXiv, 2102.07419
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap