Elastic photoproduction of rho(0) mesons at HERA

被引：120

作者：

Aid, S ^{[1
]}

Andreev, V

Andrieu, B

Appuhn, RD

Arpagaus, M

Babaev, A

Bahr, J

Ban, J

Ban, Y

Baranov, P

Barrelet, E

Barschke, R

Bartel, W

Barth, M

Bassler, U

Beck, HP

Behrend, HJ

Belousov, A

Berger, C

Bernardi, G

Bernet, R

BertrandCoremans, G

Besancon, M

Beyer, R

Biddulph, P

Bispham, P

Bizot, JC

Blobel, V

Borras, K

Botterweck, F

Boudry, V

Braemer, A

Braunschweig, W

Brisson, V

Bruncko, D

Brune, C

Buchholz, R

Bungener, L

Burger, J

Busser, FW

Buniatian, A

Burke, S

Burton, MJ

Buschhorn, G

Campbell, AJ

Carli, T

Charles, F

Charlet, M

Clarke, D

Clegg, AB

机构：

[1] RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY

[2] HUMBOLDT UNIV BERLIN,INST PHYS,BERLIN,GERMANY

[3] UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND

[4] FREE UNIV BRUSSELS,INTER UNIV INST HIGH ENERGIES,BRUSSELS,BELGIUM

[5] UNIV INSTELLING ANTWERP,WILRIJK,BELGIUM

[6] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND

[7] INST PHYS NUCL,KRAKOW,POLAND

[8] UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616

[9] UNIV CALIF DAVIS,IIRPA,DAVIS,CA 95616

[10] UNIV DORTMUND,INST PHYS,W-4600 DORTMUND,GERMANY

[11] CTR ETUD SACLAY,CEA,DSM,DAPNIA,GIF SUR YVETTE,FRANCE

[12] UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW,LANARK,SCOTLAND

[13] DESY,W-2000 HAMBURG,GERMANY

[14] UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG,GERMANY

[15] UNIV HAMBURG,INST EXPT PHYS 1,W-2000 HAMBURG,GERMANY

[16] UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY

[17] UNIV HEIDELBERG,INST HOCHENERGIEPHYS,W-6900 HEIDELBERG,GERMANY

[18] CHRISTIAN ALBRECHTS UNIV KIEL,INST REINE & ANGEW KERNPHYS,W-2300 KIEL,GERMANY

[19] SLOVAK ACAD SCI,INST EXPTL PHYS,KOSICE 04353,SLOVAKIA

[20] UNIV LANCASTER,SCH PHYS & CHEM,LANCASTER,ENGLAND

[21] UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND

[22] UNIV LONDON QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND

[23] LUND UNIV,DEPT PHYS,LUND,SWEDEN

[24] UNIV MANCHESTER,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND

[25] UNIV AIX MARSEILLE 2,IN2P3,CNRS,CPPM,MARSEILLE,FRANCE

[26] INST THEORET & EXPTL PHYS,MOSCOW 117259,RUSSIA

[27] PN LEBEDEV PHYS INST,MOSCOW 117924,RUSSIA

[28] MAX PLANCK INST PHYS & ASTROPHYS,MUNICH,GERMANY

[29] UNIV PARIS 11,IN2P3,CNRS,LAL,ORSAY,FRANCE

[30] ECOLE POLYTECH,IN2P3,CNRS,LPNHE,PALAISEAU,FRANCE

[31] UNIV PARIS 06,LPNHE,PARIS,FRANCE

[32] UNIV PARIS 07,IN2P3,CNRS,PARIS,FRANCE

[33] ACAD SCI CZECH REPUBL,INST PHYS,PRAGUE,CZECH REPUBLIC

[34] CHARLES UNIV,NUCL CTR,PRAGUE,CZECH REPUBLIC

[35] UNIV ROMA LA SAPIENZA,DIPARTIMENTO FIS,I-00185 ROME,ITALY

[36] IST NAZL FIS NUCL,ROME,ITALY

[37] PAUL SCHERRER INST,VILLIGEN,SWITZERLAND

[38] BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL,GERMANY

[39] DESY,INST HOCHENERGIEPHYS,ZEUTHEN,GERMANY

[40] ETH ZURICH,INST TEILCHENPHYS,ZURICH,SWITZERLAND

[41] UNIV ZURICH,INST PHYS,ZURICH,SWITZERLAND

来源：

NUCLEAR PHYSICS B | 1996年 / 463卷 / 01期

关键词：

vector meson; decay angular distribution; rho meson;

D O I：

10.1016/0550-3213(96)00045-4

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The cross section for the elastic photoproduction of rho(0) mesons (gamma p --> rho(0)p) has been measured with the H1 detector at HERA for two average photon-proton centre-of-mass energies of 55 and 187 GeV. The lower energy point was measured by observing directly the rho(0) decay giving a cross section of 9.1 +/- 0.9 (stat.) +/- 2.5 (syst.) mu b. The logarithmic slope parameter of the differential cross section, d sigma/dt, is found to be 10.9 +/- 2.4 (stat.) +/- 1.1 (syst.) GeV-2. The rho(0) decay polar angular distribution is found to be consistent with s-channel helicity conservation, The higher energy cross section was determined from analysis of the lower part of the hadronic invariant mass spectrum of diffractive photoproduction and found to be 13.6 +/- 0.8 (stat.) +/- 2.4(syst.) mu b.

引用

页码：3 / 29

页数：27

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