Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section

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dc.contributor.organizationThe COMPASS Collaboration
dc.date.accessioned2019-07-31T08:14:20Z
dc.date.available2019-07-31T08:14:20Z
dc.date.issued2019-07-10
dc.description.abstractWe report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/c polarised mu(+) and mu(-) beams of the CERN SPS impinging on a liquid hydrogen target. We determine the dependence of the average of the measured mu(+) and mu(-) cross sections for deeply virtual Compton scattering on the squared four-momentum transfer t from the initial to the final proton. The slope B of the t-dependence is fitted with a single exponential function, which yields B = (4.3 +/- 0.6(stat) (+0.1)(-0.3)vertical bar(sys)) (GeV/c)(-2). This result can be converted into a transverse extension of partons in the proton,root(r(perpendicular to)(2)) = (0.58 +/- 0.04(stat) (+0.01)(-0.02)vertical bar(sys) +/- 0.04(model)) fm. For this measurement, the average virtuality of the photon mediating the interaction is < Q(2)> = 1.8 (GeV/c)(2) and the average value of the Bjorken variable is < X-Bj > = 0.056. (C) 2019 Published by Elsevier B.V.cs
dc.identifier.doi10.1016/j.physletb.2019.04.038
dc.identifier.urihttps://dspace.tul.cz/handle/15240/153014
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0370269319302710
dc.language.isocscs
dc.relation.ispartofPHYSICS LETTERS B
dc.subjectCOMPASScs
dc.subjectProton sizecs
dc.subjectGeneralized Parton Distributionscs
dc.subjectDeeply virtual Compton scatteringcs
dc.subjectExclusive reactions;cs
dc.subjectDeep inelastic scatteringcs
dc.subjectQuantum chromodynamicscs
dc.titleTransverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross sectioncs
local.citation.epage194
local.citation.spage188
local.identifier.publikace7425
local.noteThe COMPASS Collaboration: Akhunzyanovg,M.G. Alexeevy,G.D. Alexeevg,A. Amorosoy,z,V. Andrieuxab,t,N.V. Anfimovg,V. Anosovg,A. Antoshking,K. Augsteng,r,W. Augustyniakac,A. Austregesiloo,C.D.R. Azevedoa,B. Badełekad,F. Balestray,z,M. Ballc,J. Barthd,R. Beckc,Y. Bedfert,J. Bernhardl,i,K. Bickero,i,E.R. Bielerti,R. Birsax,M. Bodlakq,P. Bordalok,1,F. Bradamantew,x,A. Bressanw,x,M. Bücheleh,E. Burtint,V.E. Burtsevaa,W.-C. Changu,C. Chatterjeef,M. Chiossoy,z,I. Choiab,A.G. Chumakovaa,S.-U. Chungo,2,A. Cicuttinx,3,M.L. Crespox,3,S. Dalla Torrex,S.S. Dasguptaf,S. Dasguptaw,x,O.Yu. Denisovz,∗,L. Dharaf,S.V. Donskovs,N. Doshitaaf,Ch. Dreisbacho,W. Dünnweber4,R.R. Dusaevaa,M. Dziewieckiae,A. Efremovg,5,P.D. Eversheimc,M. Faessler4,A. Ferrerot,∗,M. Fingerq,M. Finger jr.q,H. Fischerh,C. Francok,N. du Fresne von Hoheneschel,i,J.M. Friedricho,∗,V. Frolovg,i,E. Fucheyt,6,7,F. Gautheronb,ab,O.P. Gavrichtchoukg,S. Gerassimovn,o,J. Giarral,I. Gnesiy,z,M. Gorzellikh,8,A. Grassoy,z,A. Griding,M. Grosse Perdekampab,B. Grubeo,T. Grussenmeyerh,A. Guskovg,D. Hahned,G. Hamarx,D. von Harrachl,R. Heitzab,F. Herrmannh,N. Horikawap,9,N. d’Hoset,C.-Y. Hsiehu,10,S. Hubero,S. Ishimotoaf,11,A. Ivanovy,z,Yu. Ivanshing,T. Iwataaf,V. Jaryr,R. Joostenc,P. Jörgh,12,∗,K. Juraskovar,E. Kabußl,A. Kerbiziw,x,B. Ketzerc,G.V. Khaustovs,Yu.A. Khokhlovs,13,Yu. Kisselevg,F. Kleind,J.H. Koivuniemib,ab,V.N. Kolosovs,K. Kondoaf,I. Konorovn,o,V.F. Konstantinovs,A.M. Kotzinianz,14,O.M. Kouznetsovg,Z. Kralr,M. Krämero,F. Krinnero,Z.V. Kroumchteing,31,Y. Kulinichab,F. Kunnet,K. Kurekac,R.P. Kurjataae,I.I. Kuznetsovaa,A. Kvetonr,A.A. Lednevs,31,E.A. Levchenkoaa,M. Levillaint,S. Levoratox,Y.-S. Lianu,15,J. Lichtenstadtv,R. Longoy,z,V.E. Lyubovitskijaa,16,A. Maggioraz,A. Magnonab,N. Makinsab,N. Makkex,3,G.K. Malloti,S.A. Mamonaa,B. Marianskiac,A. Martinw,x,J. Marzecae,J. Matoušekw,x,q,H. Matsudaaf,T. Matsudam,G.V. Meshcheryakovg,M. Meyerab,t,W. Meyerb,Yu.V. Mikhailovs,M. Mikhasenkoc,E. Mitrofanovg,N. Mitrofanovg,Y. Miyachiaf,A. Morettiw,A. Nagaytsevg,F. Nerlingl,D. Neyrett,J. Novýr,i,W.-D. Nowakl,G. Nukazukaaf,A.S. Nunesk,A.G. Olshevskyg,I. Orlovg,M. Ostrickl,D. Panzieriz,17,B. Parsamyany,z,S. Paulo,J.-C. Pengab,F. Pereiraa,M. Pešekq,M. Peškováq,D.V. Peshekhonovg,N. Pierrel,t,S. Platchkovt,J. Pochodzallal,V.A. Polyakovs,J. Pretzd,18,M. Quaresmak,C. Quintansk,S. Ramosk,1,C. Regalih,G. Reicherzb,C. Riedlab,N.S. Rogachevag,D.I. Ryabchikovs,o,A. Rybnikovg,A. Rychterae,R. Salacr,V.D. Samoylenkos,A. Sandaczac,C. Santosx,S. Sarkarf,I.A. Saving,5,T. Sawadau,G. Sbrizzaiw,x,P. Schiavonw,x,H. Schmiedend,K. Schönningi,19,E. Sedert,A. Selyuning,L. Silvak,L. Sinhaf,S. Sirtlh,M. Sluneckag,J. Smolikg,A. Srnkae,D. Steffeni,o,M. Stolarskik,O. Subrti,r,M. Sulcj,H. Suzukiaf,9,A. Szabelskiw,x,ac,T. Szameitath,8,P. Sznajderac,M. Tasevskyg,S. Tessarox,F. Tessarottox, 194The COMPASS Collaboration / Physics Letters B 793 (2019) 188–194A. Thielc,J. Tomsaq,F. Toselloz,V. Tskhayn,S. Uhlo,B.I. Vasilishinaa,A. Vauthi,B.M. Veitl,J. Velosoa,A. Vidont,M. Viriusr,S. Wallnero,M. Wilfertl,J. ter Wolbeekh,8,K. Zarembaae,P. Zavadag,M. Zavertyaevn,E. Zemlyanichkinag,5,N. Zhuravlevg,M. Ziembicki
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