Measurement of charm fragmentation fractions in photoproduction at HERA

被引：43

作者：

Abramowicz, H. ^{[48
]}

Abt, I. ^{[36
]}

Adamczyk, L. ^{[14
]}

Adamus, M. ^{[58
]}

Aggarwal, R. ^{[7
]}

Antonelli, S. ^{[3
,4
]}

Antonioli, P. ^{[3
]}

Antonov, A. ^{[34
]}

Arneodo, M. ^{[53
,54
]}

Arslan, O. ^{[5
]}

Aushev, V. ^{[27
,28
]}

Aushev, Y. ^{[28
]}

Bachynska, O. ^{[16
]}

Bamberger, A. ^{[20
]}

Barakbaev, A. N. ^{[26
]}

Barbagli, G. ^{[18
]}

Bari, G. ^{[3
]}

Barreiro, F. ^{[31
]}

Bartosik, N. ^{[16
]}

Bartsch, D. ^{[5
]}

Basile, M. ^{[3
,4
]}

Behnke, O. ^{[16
]}

Behr, J. ^{[16
]}

Behrens, U. ^{[16
]}

Bellagamba, L. ^{[3
]}

Bertolin, A. ^{[41
]}

Bhadra, S. ^{[61
]}

Bindi, M. ^{[3
,4
]}

Blohm, C. ^{[16
]}

Bokhonov, V. ^{[27
]}

Bold, T. ^{[14
]}

Boos, E. G. ^{[26
]}

Borras, K. ^{[16
]}

Boscherini, D. ^{[3
]}

Bot, D. ^{[16
]}

Brock, I. ^{[5
]}

Brownson, E. ^{[60
]}

Brugnera, R. ^{[41
,42
]}

Bruemmer, N. ^{[39
]}

Bruni, A. ^{[3
]}

Bruni, G. ^{[3
]}

Brzozowska, B. ^{[57
]}

Bussey, P. J. ^{[21
]}

Bylsma, B. ^{[39
]}

Caldwell, A. ^{[36
]}

Capua, M. ^{[8
,9
]}

Carlin, R. ^{[41
,42
]}

Catterall, C. D. ^{[61
]}

Chekanov, S. ^{[1
]}

Chwastowski, J. ^{[13
]}

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

[2] Andrews Univ, Berrien Springs, MI 49104 USA

[3] Ist Nazl Fis Nucl, I-40126 Bologna, Italy

[4] Univ Bologna, Bologna, Italy

[5] Univ Bonn, Inst Phys, Bonn, Germany

[6] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[7] Panjab Univ, Dept Phys, Chandigarh 160014, India

[8] Univ Calabria, Dept Phys, I-87036 Cosenza, Italy

[9] INFN, Cosenza, Italy

[10] Chonnam Natl Univ, Inst Univ & Elementary Particles, Kwangju, South Korea

[11] Univ Malaya, Jabatan Fiz, Kuala Lumpur 50603, Malaysia

[12] Columbia Univ, Nevis Labs, Irvington, NY 10027 USA

[13] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[14] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland

[15] Jagiellonian Univ, Dept Phys, Krakow, Poland

[16] Deutsch Elektronen Synchrotron DESY, Hamburg, Germany

[17] Deutsch Elektronen Synchrotron DESY, Zeuthen, Germany

[18] Ist Nazl Fis Nucl, I-50125 Florence, Italy

[19] Univ Florence, Florence, Italy

[20] Univ Freiburg, Fak Phys, D-79106 Freiburg, Germany

[21] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland

[22] Univ Aegean, Dept Engn Management & Finance, Chios, Greece

[23] Univ Hamburg, Inst Expt Phys, Hamburg, Germany

[24] Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England

[25] KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan

[26] Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan

[27] Natl Acad Sci, Inst Nucl Res, Kiev, Ukraine

[28] Natl Taras Shevchenko Univ Kyiv, Dept Nucl Phys, Kiev, Ukraine

[29] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu, South Korea

[30] Catholic Univ Louvain, Inst Phys Nucl, B-3000 Louvain, Belgium

[31] Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain

[32] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[33] Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan

[34] Moscow Engn Phys Inst, Moscow 115409, Russia

[35] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow, Russia

[36] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[37] NIKHEF, Amsterdam, Netherlands

[38] Univ Amsterdam, Amsterdam, Netherlands

[39] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[40] Univ Oxford, Dept Phys, Oxford, England

[41] Ist Nazl Fis Nucl, Padua, Italy

[42] Dipartimento Fis Univ, Padua, Italy

[43] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[44] Polytech Univ, Tokyo, Japan

[45] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[46] Ist Nazl Fis Nucl, Rome, Italy

[47] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[48] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys, IL-69978 Tel Aviv, Israel

[49] Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan

[50] Univ Tokyo, Dept Phys, Tokyo 113, Japan

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2013年 / 09期

关键词：

Lepton-Nucleon Scattering; QCD; Charm physics; INCLUSIVE PRODUCTION; E+E-ANNIHILATIONS; HADRON-PRODUCTION; B-DECAYS; ZEUS; MESONS; DESIGN; LUMINOSITY; LAMBDA; SYSTEM;

D O I：

10.1007/JHEP09(2013)058

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 production of D-0, D*(+), D+, D-s(+) and Lambda(+)(c) charm hadrons and their antiparticles in ep scattering at HERA has been studied with the ZEUS detector, using a total integrated luminosity of 372 pb(-1). The fractions of charm quarks hadronising into a particular charm hadron were derived. In addition, the ratio of neutral to charged D-meson production rates, the fraction of charged D mesons produced in a vector state, and the stangeness-suppression factor have been determined. The measurements have been performed in the photoproduction regime. The charm hadrons were reconstructed in the range of transverse momentum p T > 3.8GeV and pseudorapidity vertical bar eta vertical bar < 1.6. The charm fragmentation fractions are compared to previous results from HERA and from e(+)e(-) experiments. The data support the hypothesis that fragmentation is independent of the production process.

引用

页数：28

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