Charged pion form factor between Q2=0.60 and 2.45 GeV2. I. Measurements of the cross section for the 1H(e,e'π+)n reaction

被引：122

作者：

Blok, H. P. ^{[1
,2
]}

Horn, T. ^{[3
,4
]}

Huber, G. M. ^{[5
]}

Beise, E. J. ^{[3
]}

Gaskell, D. ^{[4
]}

Mack, D. J. ^{[4
]}

Tadevosyan, V. ^{[6
]}

Volmer, J. ^{[7
,8
]}

Abbott, D. ^{[4
]}

Aniol, K. ^{[9
]}

Anklin, H. ^{[4
,10
]}

Armstrong, C. ^{[11
]}

Arrington, J. ^{[12
]}

Assamagan, K. ^{[13
]}

Avery, S. ^{[13
]}

Baker, O. K. ^{[4
,13
]}

Barrett, B. ^{[14
]}

Bochna, C. ^{[15
]}

Boeglin, W. ^{[10
]}

Brash, E. J. ^{[5
]}

Breuer, H. ^{[3
]}

Chang, C. C. ^{[3
]}

Chant, N. ^{[3
]}

Christy, M. E. ^{[13
]}

Dunne, J. ^{[4
]}

Eden, T. ^{[4
,16
]}

Ent, R. ^{[4
]}

Fenker, H. ^{[4
]}

Gibson, E. ^{[17
]}

Gilman, R. ^{[4
,18
]}

Gustafsson, K. ^{[3
]}

Hinton, W. ^{[13
]}

Holt, R. J. ^{[12
]}

Jackson, H. ^{[12
]}

Jin, S. ^{[19
]}

Jones, M. K. ^{[11
]}

Keppel, C. E. ^{[4
,13
]}

Kim, P. H. ^{[19
]}

Kim, W. ^{[19
]}

King, P. M. ^{[3
]}

Klein, A. ^{[20
]}

Koltenuk, D. ^{[21
]}

Kovaltchouk, V. ^{[5
]}

Liang, M. ^{[4
]}

Liu, J. ^{[3
]}

Lolos, G. J. ^{[5
]}

Lung, A. ^{[4
]}

Margaziotis, D. J. ^{[9
]}

Markowitz, P. ^{[10
]}

Matsumura, A. ^{[22
]}

机构：

[1] Vrije Univ Amsterdam, Dept Phys, NL-1081 HV Amsterdam, Netherlands

[2] NIKHEF H, NL-1009 DB Amsterdam, Netherlands

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

[4] TJNAF, Div Phys, Newport News, VA 23606 USA

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

[6] Yerevan Phys Inst, Yerevan 375036, Armenia

[7] Vrije Univ Amsterdam, Fac Nat Sterrenkunde, NL-1081 HV Amsterdam, Netherlands

[8] DESY, D-2000 Hamburg, Germany

[9] Calif State Univ Los Angeles, Los Angeles, CA 90032 USA

[10] Florida Int Univ, Miami, FL 33119 USA

[11] Coll William & Mary, Williamsburg, VA 23187 USA

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

[13] Hampton Univ, Hampton, VA 23668 USA

[14] St Marys Univ, Halifax, NS B3H 3C3, Canada

[15] Univ Illinois, Champaign, IL 61801 USA

[16] Norfolk State Univ, Norfolk, VA 23504 USA

[17] Calif State Univ Sacramento, Sacramento, CA 95819 USA

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

[19] Kyungpook Natl Univ, Taegu 702701, South Korea

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

[21] Univ Penn, Philadelphia, PA 19104 USA

[22] Tohoku Univ, Sendai, Miyagi 980, Japan

[23] New Mexico State Univ, Las Cruces, NM 88003 USA

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

[25] CEA Saclay, DAPNIA SPhN, F-91191 Gif Sur Yvette, France

[26] Univ Colorado, Boulder, CO 76543 USA

[27] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA

[28] MIT, Dept Phys, Cambridge, MA 02139 USA

[29] Univ Virginia, Charlottesville, VA 22901 USA

来源：

PHYSICAL REVIEW C | 2008年 / 78卷 / 04期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevC.78.045202

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Cross sections for the reaction H-1(e,e(')pi(+))n were measured in Hall C at Thomas Jefferson National Accelerator Facility (JLab) using the high-intensity Continuous Electron Beam Accelerator Facility (CEBAF) to determine the charged pion form factor. Data were taken for central four-momentum transfers ranging from Q(2)=0.60 to 2.45 GeV2 at an invariant mass of the virtual photon-nucleon system of W=1.95 and 2.22 GeV. The measured cross sections were separated into the four structure functions sigma(L),sigma(T),sigma(LT), and sigma(TT). The various parts of the experimental setup and the analysis steps are described in detail, including the calibrations and systematic studies, which were needed to obtain high-precision results. The different types of systematic uncertainties are also discussed. The results for the separated cross sections as a function of the Mandelstam variable t at the different values of Q(2) are presented. Some global features of the data are discussed, and the data are compared with the results of some model calculations for the reaction H-1(e,e(')pi(+))n.

引用

页数：25

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