Cross sections and Rosenbluth separations in 1H(e, e′ K+)Λ up to Q2=2.35 GeV2

被引：23

作者：

Coman, M. ^{[14
]}

Markowitz, P. ^{[14
]}

Aniol, K. A. ^{[1
]}

Baker, K. ^{[2
]}

Boeglin, W. U. ^{[14
]}

Breuer, H. ^{[3
]}

Bydzovsky, P. ^{[4
]}

Camsonne, A. ^{[5
]}

Cha, J. ^{[2
]}

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

Chant, N. ^{[3
]}

Chen, J-P. ^{[6
]}

Chudakov, E. A. ^{[6
]}

Cisbani, E.

Cole, L. ^{[3
]}

Cusanno, F.

de Jager, C. W. ^{[6
]}

De Leo, R. ^{[8
,9
]}

Deur, A. P. ^{[10
]}

Dieterich, S. ^{[11
]}

Dohrmann, F. ^{[12
]}

Dutta, D. ^{[13
]}

Ent, R. ^{[6
]}

Filoti, O. ^{[7
,16
]}

Fissum, K. ^{[13
]}

Frullani, S. ^{[7
,16
]}

Garibaldi, F. ^{[7
,16
]}

Gayou, O. ^{[13
]}

Gilman, F. ^{[11
]}

Gomez, J. ^{[6
]}

Gueye, P. ^{[2
]}

Hansen, J. O. ^{[6
]}

Higinbotham, D. W. ^{[6
]}

Hinton, W. ^{[2
]}

Horn, T. ^{[3
]}

Hu, B. ^{[15
]}

Huber, G. M. ^{[15
]}

Iodice, M. ^{[17
]}

Jackson, C. ^{[2
]}

Jiang, X. ^{[11
]}

Jones, M. ^{[18
]}

Kanda, K. ^{[19
]}

Keppel, C. ^{[2
]}

King, P. ^{[3
]}

Klein, F. ^{[14
]}

Kozlov, K. ^{[15
]}

Kramer, K. ^{[18
]}

Kramer, L. ^{[14
]}

Lagamba, L. ^{[8
,9
]}

LeRose, J. J. ^{[6
]}

机构：

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

[2] Hampton Univ, Hampton, VA 23668 USA

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

[4] Inst Nucl Phys, Rez Near Prague, Czech Republic

[5] Univ Blaise Pascal, IN2P3, F-63177 Aubiere, France

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

[7] Ist Nazl Fis Nucl, Sez Roma1, Grp Collegato Sanita, I-00161 Rome, Italy

[8] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[9] Univ Bari, I-70126 Bari, Italy

[10] Univ Virginia, Charlottesville, VA 22904 USA

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

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

[13] MIT, Cambridge, MA 02139 USA

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

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

[16] Ist Super Sanita, I-00161 Rome, Italy

[17] Ist Nazl Fis Nucl, Sez Roma Tre, I-00146 Rome, Italy

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

[19] Tohoku Univ, Sendai, Miyagi 9808578, Japan

[20] Tel Aviv Univ, Sch Phys & Astron, Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel

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

[22] Florida State Univ, Tallahassee, FL 32306 USA

[23] Yamagata Univ, Yamagata 9908560, Japan

[24] Old Dominion Univ, Norfolk, VA 23508 USA

[25] CEN Saclay, Daphnia SPhN, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW C | 2010年 / 81卷 / 05期

关键词：

ELECTROMAGNETIC PRODUCTION; HALL-A; PHOTOPRODUCTION;

D O I：

10.1103/PhysRevC.81.052201

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：

The kaon electroproduction reaction H-1(e, e ' K+)Lambda was studied as a function of the virtual-photon four-momentum, Q(2), total energy, W, and momentum transfer, t, for different values of the virtual-photon polarization parameter. Data were taken at electron beam energies ranging from 3.40 to 5.75 GeV. The center of mass cross section was determined for twenty-one kinematics corresponding to Q(2) of 1.90 and 2.35 GeV2, and the longitudinal, sigma(L), and transverse, sigma(T), cross sections were separated using the Rosenbluth technique at fixed W and t. The separated cross sections reveal a flat energy dependence at forward kaon angles not satisfactorily described by existing electroproduction models. Influence of the kaon pole on the cross sections was investigated by adopting an off-shell form factor in the Regge model, which better describes the observed energy dependence of sigma(T) and sigma(L).

引用

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