Measurement of the cross-section ratio σ_ψ(2S)/σ_J/ψ(1S) in deep inelastic exclusive ep scattering at HERA

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• 作者：ZEUS CollaborationH. Abramowicz^z ; ³² ; I. Abt^u ; L. Adamczyk^h ; M. Adamus^af ; S. Antonelli^b ; V. Aushev^p ; ^q ; ²⁶ ; Y. Aushev^q ; ²⁶ ; ²⁷ ; O. Behnke^j ; U. Behrens^j ; A. Bertolin^w ; I. Bloch^k ; E.G. Boos^o ; K. Borras^j ; I. Brock^c ; N.H. Brook^ad ; R. Brugnera^x ; A. Bruni^a ; P.J. Bussey^l ; A. Caldwell^u ; M. Capua^e ; C.D. Catterall^ah ; J. Chwastowski^g ; J. Ciborowski^ae ; ³⁴ ; R. Ciesielski^j ; ¹⁶ ; A.M. Cooper-Sarkar^v ; M. Corradi^a ; F. Corriveau^r ; R.K. Dementiev^t ; R.C.E. Devenish^v ; G. Dolinska^j ; S. Dusini^w ; J. Figiel^g ; B. Foster^m ; ²² ; G. Gach^h ; ¹⁴ ; E. Gallo^m ; ²³ ; A. Garfagnini^x ; A. Geiser^j ; A. Gizhko^j ; L.K. Gladilin^t ; Yu.A. Golubkov^t ; J. Grebenyuk^j ; I. Gregor^j ; G. Grzelak^ae ; O. Gueta^z ; M. Guzik^h ; W. Hain^j ; D. Hochman^ag ; R. Horiⁿ ; Z.A. Ibrahim^f ; Y. Iga^y ; M. Ishitsuka^aa ; A. Iudin^q ; ²⁷ ; F. Januschek^j ; ¹⁷ ; N.Z. Jomhari^f ; I. Kadenko^q ; S. Kananov^z ; U. Karshon^ag ; M. Kaur^d ; P. Kaur^d ; ¹¹ ; D. Kisielewska^h ; R. Klanner^m ; U. Klein^j ; ¹⁸ ; N. Kondrashova^q ; ²⁸ ; O. Kononenko^q ; Ie. Korol^j ; I.A. Korzhavina^t ; A. Kotańskiⁱ ; U. Kö ; tz^j ; N. Kovalchuk^m ; H. Kowalski^j ; B. Krupa^g ; O. Kuprash^j ; M. Kuze^aa ; B.B. Levchenko^t ; A. Levy^z ; V. Libov^j ; S. Limentani^x ; M. Lisovyi^j ; ¹⁹ ; E. Lobodzinska^j ; B. Lö ; hr^j ; E. Lohrmann^m ; A. Longhin^w ; ³¹ ; D. Lontkovskyi^j ; O.Yu. Lukina^t ; I. Makarenko^j ; J. Malka^j ; S. Mergelmeyer^c ; F. Mohamad Idris^f ; ¹³ ; N. Mohammad Nasir^f ; V. Myronenko^j ; ²⁰ ; K. Naganoⁿ ; T. Nobe^aa ; D. Notz^j ; R.J. Nowak^ae ; Yu. Onishchuk^q ; E. Paul^c ; W. Perlański^ae ; ³⁵ ; N.S. Pokrovskiy^o ; M. Przybycień^h ; P. Roloff^j ; ²¹ ; I. Rubinsky^j ; M. Ruspa^ac ; D.H. Saxon^l ; M. Schioppa^e ; W.B. Schmidke^u ; ³⁰ ; U. Schneekloth^j ; T. Schö ; rner-Sadenius^j ; L.M. Shcheglova^t ; R. Shevchenko^q ; ²⁷ ; O. Shkola^q ; ²⁹ ; Yu. Shyrma^p ; I. Singh^d ; ¹² ; I.O. Skillicorn^l ; W. Słomińskiⁱ ; ¹⁵ ; A. Solano^ab ; L. Stanco^w ; N. Stefaniuk^j ; A. Stern^z ; P. Stopa^g ; J. Sztuk-Dambietz^m ; ¹⁷ ; D. Szuba^m ; J. Szuba^j ; E. Tassi^e ; K. Tokushukuⁿ ; ²⁴ ; J. Tomaszewska^ae ; ³⁶ ; A. Trofymov^q ; ²⁸ ; T. Tsurugai^s ; M. Turcato^m ; ¹⁷ ; O. Turkot^j ; ²⁰ ; T. Tymieniecka^af ; A. Verbytskyi^u ; O. Viazlo^q ; R. Walczak^v ; W.A.T. Wan Abdullah^f ; K. Wichmann^j ; ²⁰ ; M. Wing^ad ; ³³ ; ^{m.wing@ucl.ac.uk" class="auth_mail" title="E-mail the corresponding author} ; G. Wolf^j ; S. Yamadaⁿ ; Y. Yamazakiⁿ ; ²⁵ ; N. Zakharchuk^q ; ²⁸ ; A.F. Żarnecki^ae ; L. Zawiejski^g ; O. Zenaiev^j ; B.O. Zhautykov^o ; N. Zhmak^p ; ²⁶ ; D.S. Zotkin^t
• 刊名：Nuclear Physics B
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：909
• 期：Complete
• 页码：934-953
• 全文大小：577 K

文摘

The exclusive deep inelastic electroproduction of d="mmlsi1" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si1.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=51a634e452cd74246684f897028f8290" title="Click to view the MathML source">ψ(2S)dden">de">$\psi (2S)$ and d="mmlsi19" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si19.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=c90945f386407beaa7072553b60432bd" title="Click to view the MathML source">J/ψ(1S)dden">de">$J/\psi (1S)$ at an ep   centre-of-mass energy of 317 GeV has been studied with the ZEUS detector at HERA in the kinematic range d="mmlsi3" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si3.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=56340dc0aaff5582360b815246075234" title="Click to view the MathML source">2<Q²<80 GeV²dden">de">$2<Q^2<80{\text{GeV}}^2$, d="mmlsi28" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si28.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=9dfef45440888ea1a6f8abbc17888ee9" title="Click to view the MathML source">30<W<210 GeVdden">de">$30<W<210\text{GeV}$ and d="mmlsi145" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si145.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=3916b3fafdbb1340b14f3b53f79b2f84" title="Click to view the MathML source">|t|<1 GeV²dden">de">$|t|<1{\text{GeV}}^2$, where d="mmlsi6" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si6.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=9456c48e83e7d287033d481b28f98d13" title="Click to view the MathML source">Q²dden">de">$Q^2$ is the photon virtuality, W is the photon&ndash;proton centre-of-mass energy and t   is the squared four-momentum transfer at the proton vertex. The data for d="mmlsi146" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si146.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=1d5585884595f4968359e219adcc2e05" title="Click to view the MathML source">2<Q²<5 GeV²dden">de">$2<Q^2<5{\text{GeV}}^2$ were taken in the HERA I running period and correspond to an integrated luminosity of 114 pb⁻¹. The data for d="mmlsi201" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si201.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=3fed3e213245e1a674e62f19d752c8ce" title="Click to view the MathML source">5<Q²<80 GeV²dden">de">$5<Q^2<80{\text{GeV}}^2$ are from both HERA I and HERA II periods and correspond to an integrated luminosity of 468 pb⁻¹. The decay modes analysed were d="mmlsi9" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si9.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=bf80a07e5cc5a0836022e93839377237" title="Click to view the MathML source">μ⁺μ⁻dden">de">${\mu }^{+}{\mu }^{-}$ and d="mmlsi10" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si10.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=f3fa5553364d22fea40bcccd0ed4c0dc">dth="106" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0550321316301523-si10.gif">dden">de"> for the d="mmlsi1" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si1.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=51a634e452cd74246684f897028f8290" title="Click to view the MathML source">ψ(2S)dden">de">$\psi (2S)$ and d="mmlsi9" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si9.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=bf80a07e5cc5a0836022e93839377237" title="Click to view the MathML source">μ⁺μ⁻dden">de">${\mu }^{+}{\mu }^{-}$ for the d="mmlsi19" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si19.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=c90945f386407beaa7072553b60432bd" title="Click to view the MathML source">J/ψ(1S)dden">de">$J/\psi (1S)$. The cross-section ratio d="mmlsi105" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si105.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=378c67363aa2ec90e350d6e7c6164ae0" title="Click to view the MathML source">σ_ψ(2S)/σ_J/ψ(1S)dden">de">${\sigma }_{\psi (2S)}/{\sigma }_{J/\psi (1S)}$ has been measured as a function of d="mmlsi12" class="mathmlsrc">data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0550321316301523&_mathId=si12.gif&_user=111111111&_pii=S0550321316301523&_rdoc=1&_issn=05503213&md5=6c06f054943d4c643bb60219958c82ec">dth="46" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0550321316301523-si12.gif">dden">de">  and t. The results are compared to predictions of QCD-inspired models of exclusive vector-meson production.