Transverse momentum dependence of semi-inclusive pion production

被引：54

作者：

Mkrtchyan, H. ^{[2
]}

Bosted, P. E. ^{[1
,3
]}

Adams, G. S. ^{[4
]}

Ahmidouch, A. ^{[5
]}

Angelescu, I. ^{[6
]}

Arrington, J. ^{[7
]}

Asaturyan, R. ^{[2
]}

Baker, O. K. ^{[1
,8
]}

Benmouna, N. ^{[9
]}

Bertoncini, C. ^{[10
]}

Blok, H. P. ^{[11
]}

Boeglin, W. U. ^{[12
]}

Breuer, H. ^{[13
]}

Christy, M. E.

Connell, S. H. ^{[14
]}

Cui, Y. ^{[15
]}

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

Danagoulian, S. ^{[5
]}

Day, D. ^{[16
]}

Dodario, T. ^{[15
]}

Dunne, J. A. ^{[17
]}

Dutta, D. ^{[18
,19
]}

El Khayari, N. ^{[15
]}

Ent, R. ^{[1
]}

Fenker, H. C. ^{[1
]}

Frolov, V. V. ^{[20
]}

Gan, L. ^{[21
]}

Gaskell, D. ^{[1
]}

Hafidi, K. ^{[7
]}

Hinton, W. ^{[8
]}

Holt, R. J. ^{[7
]}

Horn, T. ^{[1
]}

Huber, G. M. ^{[22
]}

Hungerford, E. ^{[15
]}

Jiang, X. ^{[23
]}

Jones, M. ^{[1
]}

Joo, K. ^{[24
]}

Kalantarians, N. ^{[15
]}

Kelly, J. J. ^{[13
]}

Keppel, C. E. ^{[1
,8
]}

Kubarovsky, V. ^{[1
]}

Li, Y. ^{[15
]}

Liang, Y. ^{[25
]}

Malace, S. ^{[6
]}

Markowitz, P. ^{[12
]}

McGrath, E. ^{[26
]}

McKee, P. ^{[16
]}

Meekins, D. G. ^{[1
]}

Moziak, B. ^{[4
]}

Navasardyan, T. ^{[2
]}

机构：

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

[2] Yerevan Phys Inst, Yerevan 375036, Armenia

[3] Univ Massachusetts, Amherst, MA 01003 USA

[4] Rensselaer Polytech Inst, Troy, NY 12180 USA

[5] N Carolina Agr & Tech State Univ, Greensboro, NC 27411 USA

[6] Univ Bucharest, Bucharest, Romania

[7] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[8] Hampton Univ, Hampton, VA 23668 USA

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

[10] Vassar Coll, Poughkeepsie, NY 12604 USA

[11] Vrije Univ Amsterdam, NL-1081 HV Amsterdam, Netherlands

[12] Florida Int Univ, University Pk, FL 33199 USA

[13] Univ Maryland, College Pk, MD 20742 USA

[14] Univ Witwatersrand, Johannesburg, South Africa

[15] Univ Houston, Houston, TX 77204 USA

[16] Univ Virginia, Charlottesville, VA 22901 USA

[17] Mississippi State Univ, Mississippi State, MS 39762 USA

[18] Duke Univ, Durham, NC 27708 USA

[19] Triangle Univ Nucl Lab, Durham, NC 27708 USA

[20] CALTECH, Pasadena, CA 91125 USA

[21] Univ N Carolina, Wilmington, NC 28403 USA

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

[23] Rutgers State Univ, Piscataway, NJ 08855 USA

[24] Univ Connecticut, Storrs, CT 06269 USA

[25] Ohio Univ, Athens, OH 45071 USA

[26] James Madison Univ, Harrisonburg, VA 22807 USA

[27] Gettysburg Coll, Allentown, PA 18103 USA

来源：

PHYSICS LETTERS B | 2008年 / 665卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.physletb.2008.05.047

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Cross sections for semi-inclusive electroproduction of charged pions (pi(+/-)) from both proton and deuteron targets were measured for 0.2 < x < 0.5, 2 < Q(2) < 4 GeV(2), 0.3 < z < 1, and P(t)(2) < 0.2 GeV(2). For P(t) < 0.1 GeV, we find the azimuthal dependence to be small, as expected theoretically. For both pi(+) and pi(-), the P(t) dependence from the deuteron is found to be slightly weaker than from the proton. In the context of a simple model, this implies that the initial transverse momenta width of d quarks is larger than for u quarks and, contrary to expectations, the transverse momentum width of the favored fragmentation function is larger than the unfavored one. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：20 / 25

页数：6

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