Determination of the pion charge form factor at Q2=1.60 and 2.45 (GeV/c)2

被引：258

作者：

Horn, T. ^{[1
]}

Aniol, K.

Arrington, J.

Barrett, B.

Beise, E. J.

Blok, H. P.

Boeglin, W.

Brash, E. J.

Breuer, H.

Chang, C. C.

Christy, M. E.

Ent, R.

Gaskell, D.

Gibson, E.

Holt, R. J.

Huber, G. M.

Jin, S.

Jones, M. K.

Keppel, C. E.

Kim, W.

King, P. M.

Kovaltchouk, V.

Liu, J.

Lolos, G. J.

Mack, D. J.

Margaziotis, D. J.

Markowitz, P.

Matsumura, A.

Meekins, D.

Miyoshi, T.

Mkrtchyan, H.

Niculescu, I.

Okayasu, Y.

Pentchev, L.

Perdrisat, C.

Potterveld, D.

Punjabi, V.

Reimer, P.

Reinhold, J.

Roche, J.

Roos, P. G.

Sarty, A.

Smith, G. R.

Tadevosyan, V.

Tang, L. G.

Tvaskis, V.

Vidakovic, S.

Volmer, J.

Vulcan, W.

Warren, G.

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

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

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

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

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

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

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

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

[9] Hampton Univ, Hampton, VA 23668 USA

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

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

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

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

[14] Yerevan Phys Inst, Yerevan 375036, Armenia

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

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

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

[18] DESY, D-2000 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.97.192001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The H-1(e,e(')pi(+))n cross section was measured at four-momentum transfers of Q(2)=1.60 and 2.45 GeV2 at an invariant mass of the photon nucleon system of W=2.22 GeV. The charged pion form factor (F-pi) was extracted from the data by comparing the separated longitudinal pion electroproduction cross section to a Regge model prediction in which F-pi is a free parameter. The results indicate that the pion form factor deviates from the charge-radius constrained monopole form at these values of Q(2) by one sigma, but is still far from its perturbative quantum chromodynamics prediction.

引用

页数：4

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