Measurement of Compton Scattering at MAMI for the Extraction of the Electric and Magnetic Polarizabilities of the Proton

被引：8

作者：

Mornacchi, E. ^{[1
]}

Martel, P. P. ^{[1
,2
]}

Abt, S. ^{[3
]}

Achenbach, P. ^{[1
]}

Adlarson, P. ^{[1
]}

Afzal, F. ^{[4
]}

Ahmed, Z. ^{[5
]}

Annand, J. R. M. ^{[6
]}

Arends, H. J. ^{[1
]}

Bashkanov, M. ^{[7
]}

Beck, R. ^{[4
]}

Biroth, M. ^{[1
]}

Borisov, N. ^{[8
]}

Braghieri, A. ^{[9
]}

Briscoe, W. J. ^{[10
]}

Cividini, F. ^{[1
]}

Collicott, C. ^{[1
]}

Costanza, S. ^{[9
]}

Denig, A. ^{[1
]}

Dolzhikov, A. S. ^{[8
]}

Downie, E. J. ^{[10
]}

Drexler, P. ^{[1
]}

Fegan, S. ^{[7
]}

Gardner, S. ^{[6
]}

Ghosal, D. ^{[3
]}

Glazier, D., I ^{[6
]}

Gorodnov, I ^{[8
]}

Gradl, W. ^{[1
]}

Guenther, M. ^{[3
]}

Gurevich, D. ^{[11
]}

Heijkenskjoeld, L. ^{[1
]}

Hornidge, D. ^{[2
]}

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

Kaeser, A. ^{[3
]}

Kashevarov, V. L. ^{[1
,8
]}

Kay, S. J. D. ^{[5
]}

Korolija, M. ^{[12
]}

Krusche, B. ^{[3
]}

Lazarev, A. ^{[8
]}

Livingston, K. ^{[6
]}

Lutterer, S. ^{[3
]}

MacGregor, I. J. D. ^{[6
]}

Manley, D. M. ^{[13
]}

Miskimen, R. ^{[14
]}

Mocanu, M. ^{[7
]}

Mullen, C. ^{[6
]}

Neganov, A. ^{[8
]}

Neiser, A. ^{[1
]}

Ostrick, M. ^{[1
]}

Paudyal, D. ^{[5
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[2] Mt Allison Univ, Sackville, NB E4L 1E6, Canada

[3] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[4] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

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

[6] Univ Glasgow, SUPA Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[7] Univ York, Dept Phys, York Y010 5DD, N Yorkshire, England

[8] Joint Inst Nucl Res, Dubna 141980, Russia

[9] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

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

[11] Inst Nucl Res, Moscow 125047, Russia

[12] Rudjer Boskovic Inst, HR-10000 Zagreb, Croatia

[13] Kent State Univ, Kent, OH 44242 USA

[14] Univ Massachusetts, Amherst, MA 01003 USA

来源：

PHYSICAL REVIEW LETTERS | 2022年 / 128卷 / 13期

基金：

美国国家科学基金会; 瑞士国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

LOW-ENERGY PHOTONS; POLARIZED PHOTONS; HYDROGEN; NUCLEON; MICROTRON; SYSTEM; LIGHT; MAINZ;

D O I：

10.1103/PhysRevLett.128.132503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A precise measurement of the differential cross sections d sigma/d Omega and the linearly polarized photon beam asymmetry Sigma(3) for Compton scattering on the proton below pion threshold has been performed with a tagged photon beam and almost 4 pi detector at the Mainz Microtron. The incident photons were produced by the recently upgraded Glasgow-Mainz photon tagging facility and impinged on a cryogenic liquid hydrogen target, with the scattered photons detected in the Crystal Ball/TAPS setup. Using the highest statistics Compton scattering data ever measured on the proton along with two effective field theories (both covariant baryon and heavy-baryon) and one fixed-t dispersion relation model, constraining the fits with the Baldin sum rule, we have obtained the proton electric and magnetic polarizabilities with unprecedented precision: alpha(E1) = 10.99 +/- 0.16 +/- 0.47 +/- 0.17 +/- 0.34, beta(M1) = 3.14 +/- 0.21 +/- 0.24 +/- 0.20 +/- 0.35; in units of 10(-4) fm(3) where the errors are statistical, systematic, spin polarizability dependent, and model dependent.

引用

页数：6

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