New Insight in the Q2 Dependence of Proton Generalized Polarizabilities

(A1 Collaboration)

doi:10.1103/PhysRevLett.123.192302

New Insight in the Q2 Dependence of Proton Generalized Polarizabilities

(A1 Collaboration)

Physics and Astronomy

Jožef Stefan Institute
Université Clermont Auvergne
Johannes Gutenberg University Mainz
Temple University
University of Zagreb
George Washington University
Massachusetts Institute of Technology
University of Ljubljana

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Virtual Compton scattering on the proton has been investigated at three yet unexplored values of the four-momentum transfer Q2: 0.10, 0.20, and 0.45 GeV2, at the Mainz Microtron. Fits performed using either the low-energy theorem or dispersion relations allowed the extraction of the structure functions PLL-PTT/ϵ and PLT, as well as the electric and magnetic generalized polarizabilities αE1(Q2) and βM1(Q2). These new results show a smooth and rapid falloff of αE1(Q2), in contrast to previous measurements at Q2=0.33 GeV2, and provide for the first time a precise mapping of βM1(Q2) in the low-Q2 region.

Original language	English
Article number	192302
Journal	Physical Review Letters
Volume	123
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.123.192302
State	Published - Nov 7 2019

Access to Document

10.1103/PhysRevLett.123.192302

Cite this

@article{514f813430464ab7a5597d204d6574d3,

title = "New Insight in the Q2 Dependence of Proton Generalized Polarizabilities",

abstract = "Virtual Compton scattering on the proton has been investigated at three yet unexplored values of the four-momentum transfer Q2: 0.10, 0.20, and 0.45 GeV2, at the Mainz Microtron. Fits performed using either the low-energy theorem or dispersion relations allowed the extraction of the structure functions PLL-PTT/ϵ and PLT, as well as the electric and magnetic generalized polarizabilities αE1(Q2) and βM1(Q2). These new results show a smooth and rapid falloff of αE1(Q2), in contrast to previous measurements at Q2=0.33 GeV2, and provide for the first time a precise mapping of βM1(Q2) in the low-Q2 region.",

author = "\{(A1 Collaboration)\} and J. Beri{\v c}i{\v c} and L. Correa and M. Benali and P. Achenbach and \{Ayerbe Gayoso\}, C. and Bernauer, \{J. C.\} and A. Blomberg and R. B{\"o}hm and D. Bosnar and L. Debenjak and A. Denig and Distler, \{M. O.\} and Downie, \{E. J.\} and A. Esser and H. Fonvieille and I. Fri{\v s}{\v c}i{\'c} and S. Kegel and Y. Kohl and M. Makek and H. Merkel and Middleton, \{D. G.\} and M. Mihovilovi{\v c} and U. M{\"u}ller and L. Nungesser and M. Paolone and J. Pochodzalla and \{S{\'a}nchez Majos\}, S. and Schlimme, \{B. S.\} and M. Schoth and F. Schulz and C. Sfienti and S. {\v S}irca and N. Sparveris and S. {\v S}tajner and M. Thiel and A. Tyukin and A. Weber and M. Weinriefer",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = nov,

day = "7",

doi = "10.1103/PhysRevLett.123.192302",

language = "English",

volume = "123",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "19",

}

TY - JOUR

T1 - New Insight in the Q2 Dependence of Proton Generalized Polarizabilities

AU - (A1 Collaboration)

AU - Beričič, J.

AU - Correa, L.

AU - Benali, M.

AU - Achenbach, P.

AU - Ayerbe Gayoso, C.

AU - Bernauer, J. C.

AU - Blomberg, A.

AU - Böhm, R.

AU - Bosnar, D.

AU - Debenjak, L.

AU - Denig, A.

AU - Distler, M. O.

AU - Downie, E. J.

AU - Esser, A.

AU - Fonvieille, H.

AU - Friščić, I.

AU - Kegel, S.

AU - Kohl, Y.

AU - Makek, M.

AU - Merkel, H.

AU - Middleton, D. G.

AU - Mihovilovič, M.

AU - Müller, U.

AU - Nungesser, L.

AU - Paolone, M.

AU - Pochodzalla, J.

AU - Sánchez Majos, S.

AU - Schlimme, B. S.

AU - Schoth, M.

AU - Schulz, F.

AU - Sfienti, C.

AU - Širca, S.

AU - Sparveris, N.

AU - Štajner, S.

AU - Thiel, M.

AU - Tyukin, A.

AU - Weber, A.

AU - Weinriefer, M.

PY - 2019/11/7

Y1 - 2019/11/7

N2 - Virtual Compton scattering on the proton has been investigated at three yet unexplored values of the four-momentum transfer Q2: 0.10, 0.20, and 0.45 GeV2, at the Mainz Microtron. Fits performed using either the low-energy theorem or dispersion relations allowed the extraction of the structure functions PLL-PTT/ϵ and PLT, as well as the electric and magnetic generalized polarizabilities αE1(Q2) and βM1(Q2). These new results show a smooth and rapid falloff of αE1(Q2), in contrast to previous measurements at Q2=0.33 GeV2, and provide for the first time a precise mapping of βM1(Q2) in the low-Q2 region.

AB - Virtual Compton scattering on the proton has been investigated at three yet unexplored values of the four-momentum transfer Q2: 0.10, 0.20, and 0.45 GeV2, at the Mainz Microtron. Fits performed using either the low-energy theorem or dispersion relations allowed the extraction of the structure functions PLL-PTT/ϵ and PLT, as well as the electric and magnetic generalized polarizabilities αE1(Q2) and βM1(Q2). These new results show a smooth and rapid falloff of αE1(Q2), in contrast to previous measurements at Q2=0.33 GeV2, and provide for the first time a precise mapping of βM1(Q2) in the low-Q2 region.

UR - https://www.scopus.com/pages/publications/85074889883

U2 - 10.1103/PhysRevLett.123.192302

DO - 10.1103/PhysRevLett.123.192302

M3 - Article

C2 - 31765208

AN - SCOPUS:85074889883

SN - 0031-9007

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

M1 - 192302

ER -

New Insight in the Q2 Dependence of Proton Generalized Polarizabilities

Abstract

Access to Document

Other files and links

Fingerprint

Cite this