First Measurement of Near-Threshold J/ψ Exclusive Photoproduction off the Proton

被引：151

作者：

Ali, A. ^{[10
]}

Amaryan, M. ^{[22
]}

Anassontzis, E. G. ^{[2
]}

Austregesilo, A. ^{[3
]}

Baalouch, M. ^{[22
]}

Barbos, F. ^{[14
]}

Barlow, J. ^{[7
]}

Barnes, A. ^{[3
]}

Barriga, E. ^{[7
]}

Beattie, T. D. ^{[23
]}

Berdnikov, V. V. ^{[17
]}

Black, T. ^{[20
]}

Boeglin, W. ^{[6
]}

Boer, M. ^{[4
]}

Briscoe, W. J. ^{[8
]}

Britton, T. ^{[14
]}

Brooks, W. K. ^{[24
]}

Cannon, B. E. ^{[7
]}

Cao, N. ^{[11
]}

Chudakov, E. ^{[14
]}

Cole, S. ^{[1
]}

Cortes, O. ^{[8
]}

Crede, V ^{[7
]}

Dalton, M. M. ^{[14
]}

Daniels, T. ^{[20
]}

Deur, A. ^{[14
]}

Dobbs, S. ^{[7
]}

Dolgolenko, A. ^{[13
]}

Dotel, R. ^{[6
]}

Dugger, M. ^{[1
]}

Dzhygadlo, R. ^{[10
]}

Egiyan, H. ^{[14
]}

Ernst, A. ^{[7
]}

Eugenio, P. ^{[7
]}

Fanelli, C. ^{[16
]}

Fegan, S. ^{[8
]}

Foda, A. M. ^{[23
]}

Foote, J. ^{[12
]}

Frye, J. ^{[12
]}

Furletov, S. ^{[14
]}

Gan, L. ^{[20
]}

Gasparian, A. ^{[19
]}

Gauzshtein, V ^{[25
,26
]}

Gevorgyan, N. ^{[27
]}

Gleason, C. ^{[12
]}

Goetzen, K. ^{[10
]}

Goncalves, A. ^{[7
]}

Goryachev, V. S. ^{[13
]}

Guo, L. ^{[6
]}

Hakobyan, H. ^{[24
]}

机构：

[1] Arizona State Univ, Tempe, AZ 85287 USA

[2] Natl & Kapodistrian Univ Athens, Athens 15771, Greece

[3] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[4] Catholic Univ Amer, Washington, DC 20064 USA

[5] Univ Connecticut, Storrs, CT 06269 USA

[6] Florida Int Univ, Miami, FL 33199 USA

[7] Florida State Univ, Tallahassee, FL 32306 USA

[8] George Washington Univ, Washington, DC 20052 USA

[9] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[10] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[11] Inst High Energy Phys, Beijing 100049, Peoples R China

[12] Indiana Univ, Bloomington, IN 47405 USA

[13] Inst Theoret & Expt Phys, Natl Res Ctr, Kurchatov Inst, Moscow 117259, Russia

[14] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[15] Univ Massachusetts, Amherst, MA 01003 USA

[16] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[17] Natl Res Nucl Univ, Moscow Engn Phys Inst, Moscow 115409, Russia

[18] Notfolk State Univ, Norfolk, VA 23504 USA

[19] North Carolina A&T State Univ, Greensboro, NC 27411 USA

[20] Univ North Carolina Wilmington, Wilmington, NC 28403 USA

[21] Northwestern Univ, Evanston, IL 60208 USA

[22] Old Dominion Univ, Norfolk, VA 23529 USA

[23] Univ Regina, Regina, SK S4S 0A2, Canada

[24] Univ Tecn Federico Santa Maria, Casilla 110-V, Valparaiso, Chile

[25] Tomsk State Univ, Tomsk 634050, Russia

[26] Tomsk Polytech Univ, Tomsk 634050, Russia

[27] Yerevan Phys Inst, AI Alikhanian Natl Sci Lab, Yerevan 0036, Armenia

[28] Coll William & Mary, Williamsburg, VA 23185 USA

[29] Wuhan Univ, Wuhan 430072, Hubei, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 07期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会; 英国科学技术设施理事会; 俄罗斯基础研究基金会; 中国国家自然科学基金;

关键词：

Atomic physics - Germanium compounds;

D O I：

10.1103/PhysRevLett.123.072001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the measurement of the gamma p -> J/psi p cross section from E-gamma = 11.8 GeV down to the threshold at 8.2 GeV using a tagged photon beam with the GlueX experiment. We find that the total cross section falls toward the threshold less steeply than expected from two-gluon exchange models. The differential cross section d sigma/dt has an exponential slope of 1.67 +/- 0.39 GeV-2 at 10.7 GeV average energy. The LHCb pentaquark candidates P-c(+) can be produced in the s channel of this reaction. We see no evidence for them and set model-dependent upper limits on their branching fractions B(P-c(+) -> J/psi p) and cross sections sigma(gamma p -> P-c(+)) x B(P-c(+) -> J/psi p).

引用

页数：6

共 50 条

[31] Photoproduction of the ω meson on the proton near threshold
Strakovsky, I. I.
Prakhov, S.
Azimov, Ya. I.
Aguar-Bartolome, P.
Annand, J. R. M.
Arends, H. J.
Bantawa, K.
Beck, R.
Bekrenev, V.
Berghaeuser, H.
Braghieri, A.
Briscoe, W. J.
Brudvik, J.
Cherepnya, S.
Codling, R. F. B.
Collicott, C.
Costanza, S.
Demissie, B. T.
Downie, E. J.
Drexler, P.
Fil'kov, L. V.
Glazier, D. I.
Gregor, R.
Hamilton, D. J.
Heid, E.
Hornidge, D.
Jaegle, I.
Jahn, O.
Jude, T. C.
Kashevarov, V. L.
Keshelashvili, I.
Kondratiev, R.
Korolija, M.
Kotulla, M.
Koulbardis, A.
Kruglov, S.
Krusche, B.
Lisin, V.
Livingston, K.
MacGregor, I. J. D.
Maghrbi, Y.
Manley, D. M.
Marinides, Z.
McGeorge, J. C.
McNicoll, E. F.
Mekterovic, D.
Metag, V.
Middleton, D. G.
Mushkarenkov, A.
Nefkens, B. M. K.
PHYSICAL REVIEW C, 2015, 91 (04):
[32] Near-Threshold Photoproduction of Λ(1520) from Protons and Deuterons
Muramatsu, N.
Chen, J. Y.
Chang, W. C.
Ahn, D. S.
Ahn, J. K.
Akimune, H.
Asano, Y.
Date, S.
Ejiri, H.
Fujimura, H.
Fujiwara, M.
Fukui, S.
Hasegawa, S.
Hicks, K.
Horie, K.
Hotta, T.
Imai, K.
Ishikawa, T.
Iwata, T.
Kato, Y.
Kawai, H.
Kino, K.
Kohri, H.
Kumagai, N.
Makino, S.
Matsuda, T.
Matsumura, T.
Matsuoka, N.
Mibe, T.
Miyabe, M.
Miyachi, M.
Nakano, T.
Niiyama, M.
Nomachi, M.
Ohashi, Y.
Ohkuma, H.
Ooba, T.
Oshuev, D. S.
Rangacharyulu, C.
Sakaguchi, A.
Shagin, P. M.
Shiino, Y.
Shimizu, H.
Sugaya, Y.
Sumihama, M.
Toi, Y.
Toyokawa, H.
Wakai, A.
Wang, C. W.
Wang, S. C.
PHYSICAL REVIEW LETTERS, 2009, 103 (01)
[33] ETA-MESON PHOTOPRODUCTION ON HYDROGEN NEAR-THRESHOLD
PRICE, JW
ANTON, G
ARENDS, J
BEULERTZ, W
BOCK, A
BREUER, M
BUCHLER, K
CLAJUS, M
DETEMPLE, P
HEY, J
KRAMER, D
MEYER, W
NEFKENS, BMK
NOLDEKE, G
SCHNEIDER, W
ZUCHT, B
PHYSICAL REVIEW C, 1995, 51 (05) : R2283 - R2287
[34] PRECISE MEASUREMENT OF NEUTRAL-PION PHOTOPRODUCTION ON THE PROTON NEAR THRESHOLD
MAZZUCATO, E
ARGAN, P
AUDIT, G
BLOCH, A
DEBOTTON, N
DHOSE, N
FAURE, JL
GHEDIRA, ML
GUERRA, C
MARTIN, J
SCHUHL, C
TAMAS, G
VINCENT, E
PHYSICAL REVIEW LETTERS, 1986, 57 (25) : 3144 - 3147
[35] Exclusive photoproduction of J/ψ and ψ' mesons in proton-proton collisions
Cisek, Anna
Schaefer, Wolfgang
Szczurek, Antoni
MESON 2014 - 13TH INTERNATIONAL WORKSHOP ON PRODUCTION, PROPERTIES AND INTERACTION OF MESONS, 2014, 81
[36] Double π0 photoproduction off the proton at threshold
Kotulla, M
Ahrens, J
Annand, JRM
Beck, R
Hornidge, D
Janssen, S
Krusche, B
McGeorge, JC
MacGregor, IJD
Messchendorp, JG
Metag, V
Novotny, R
Pfeiffer, M
Owens, RO
Rost, M
Schadmand, S
Watts, DP
PHYSICS LETTERS B, 2004, 578 (1-2) : 63 - 68
[37] Photoproduction of J/Ψ and γ in exclusive and proton dissociative diffractive events
Schafer, Wolfgang
Cisek, Anna
Szczurek, Antoni
MESON 2016 - 14TH INTERNATIONAL WORKSHOP ON MESON PRODUCTION, PROPERTIES AND INTERACTION, 2016, 130
[38] NEAR-THRESHOLD PHOTOPRODUCTION OF ETA-MESONS FROM THE DEUTERON
KRUSCHE, B
AHRENS, J
ANNAND, JRM
ANTON, G
BECK, R
FUCHS, M
GABLER, AR
HARTER, F
HEJNY, V
KELLIE, JD
MCGEORGE, JC
METAG, V
PEISE, J
ROBIGLANDAU, M
SCHUBERT, A
STROHER, H
PHYSICS LETTERS B, 1995, 358 (1-2) : 40 - 46
[39] Near-threshold quasifree π0-photoproduction from the deuteron
Darwish, E. M.
Shehata, M. A.
Al-Thoyaib, S. S.
CHINESE JOURNAL OF PHYSICS, 2007, 45 (04) : 432 - 446
[40] Subthreshold and near-threshold K+-meson photoproduction on nuclei
É. Ya. Paryev
Physics of Atomic Nuclei, 2000, 63 : 1781 - 1791

← 1 2 3 4 5 →