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

(A2 Collaboration at MAMI)

doi:10.1103/PhysRevLett.128.132503

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

(A2 Collaboration at MAMI)

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

Abstract

A precise measurement of the differential cross sections dσ/dω and the linearly polarized photon beam asymmetry ς3 for Compton scattering on the proton below pion threshold has been performed with a tagged photon beam and almost 4π 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: αE1=10.99±0.16±0.47±0.17±0.34, βM1=3.14±0.21±0.24±0.20±0.35; in units of 10-4 fm3 where the errors are statistical, systematic, spin polarizability dependent, and model dependent.

Original language	English
Article number	132503
Number of pages	6
Journal	Physical Review Letters
Volume	128
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.128.132503
Publication status	Published - 1 Apr 2022

Bibliographical note

© 2022 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details
Funding Information:
The authors wish to acknowledge the outstanding support of the accelerator group and operators of MAMI. We also wish to acknowledge and thank J. McGovern, V. Pascalutsa, and B. Pasquini for providing us with their theory codes, together with H. Grießhammer and M. Vanderhaegen for the theoretical contributions and support. This project has received funding from the European Unions Horizon 2020 research and innovation program under Grant Agreement No. 824093. This work has been supported by the U.K. STFC (ST/L005719/1, ST/P004458/1, ST/T002077/1,ST/P004385/2, ST/V002570/1, ST/P004008/1 and ST/L00478X/2) grants, the Deutsche Forschungsgemeinschaft (SFB443, SFB/TR16, and SFB1044), DFG-RFBR (Grant No. 09-02-91330), Schweizerischer Nationalfonds (Contracts No. 200020-175807, No. 200020-156983, No. 132799, No. 121781, No. 117601), the U.S. Department of Energy (Offices of Science and Nuclear Physics, Awards No. DE-SC0014323, No. DEFG02-99-ER41110, No. DE-FG02-88ER40415, No. DEFG02-01-ER41194) and National Science Foundation (Grants No. NSF OISE-1358175; No. PHY-1039130, No. PHY-1714833, No. PHY-2012940, No. IIA-1358175), INFN (Italy), and NSERC of Canada (Grant No. FRN-SAPPJ2015-00023).

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10.1103/PhysRevLett.128.132503

Measurement of Compton Scattering at MAMI for the Extraction of the Electric and Magnetic Polarizabilities of the Proton
© 2022 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details
Final published version, 330 KB

Cite this

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title = "Measurement of Compton Scattering at MAMI for the Extraction of the Electric and Magnetic Polarizabilities of the Proton",

abstract = "A precise measurement of the differential cross sections dσ/dω and the linearly polarized photon beam asymmetry ς3 for Compton scattering on the proton below pion threshold has been performed with a tagged photon beam and almost 4π 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: αE1=10.99±0.16±0.47±0.17±0.34, βM1=3.14±0.21±0.24±0.20±0.35; in units of 10-4 fm3 where the errors are statistical, systematic, spin polarizability dependent, and model dependent.",

author = "{(A2 Collaboration at MAMI)} and E. Mornacchi and Martel, {P. P.} and S. Abt and P. Achenbach and P. Adlarson and F. Afzal and Z. Ahmed and Annand, {J. R.M.} and Arends, {H. J.} and M. Bashkanov and R. Beck and M. Biroth and N. Borisov and A. Braghieri and Briscoe, {W. J.} and F. Cividini and C. Collicott and S. Costanza and A. Denig and Dolzhikov, {A. S.} and Downie, {E. J.} and P. Drexler and S. Fegan and S. Gardner and D. Ghosal and Glazier, {D. I.} and I. Gorodnov and W. Gradl and M. G{\"u}nther and D. Gurevich and L. Heijkenskj{\"o}ld and D. Hornidge and Huber, {G. M.} and A. K{\"a}ser and Kashevarov, {V. L.} and Kay, {S. J.D.} and M. Korolija and B. Krusche and A. Lazarev and K. Livingston and S. Lutterer and Macgregor, {I. J.D.} and Manley, {D. M.} and R. Miskimen and M. Mocanu and C. Mullen and A. Neganov and Watts, {D. P.} and D. Werthm{\"u}ller and N. Zachariou",

note = "{\textcopyright} 2022 American Physical Society. Uploaded in accordance with the publisher{\textquoteright}s self-archiving policy. Further copying may not be permitted; contact the publisher for details Funding Information: The authors wish to acknowledge the outstanding support of the accelerator group and operators of MAMI. We also wish to acknowledge and thank J. McGovern, V. Pascalutsa, and B. Pasquini for providing us with their theory codes, together with H. Grie{\ss}hammer and M. Vanderhaegen for the theoretical contributions and support. This project has received funding from the European Unions Horizon 2020 research and innovation program under Grant Agreement No. 824093. This work has been supported by the U.K. STFC (ST/L005719/1, ST/P004458/1, ST/T002077/1,ST/P004385/2, ST/V002570/1, ST/P004008/1 and ST/L00478X/2) grants, the Deutsche Forschungsgemeinschaft (SFB443, SFB/TR16, and SFB1044), DFG-RFBR (Grant No. 09-02-91330), Schweizerischer Nationalfonds (Contracts No. 200020-175807, No. 200020-156983, No. 132799, No. 121781, No. 117601), the U.S. Department of Energy (Offices of Science and Nuclear Physics, Awards No. DE-SC0014323, No. DEFG02-99-ER41110, No. DE-FG02-88ER40415, No. DEFG02-01-ER41194) and National Science Foundation (Grants No. NSF OISE-1358175; No. PHY-1039130, No. PHY-1714833, No. PHY-2012940, No. IIA-1358175), INFN (Italy), and NSERC of Canada (Grant No. FRN-SAPPJ2015-00023). ",

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doi = "10.1103/PhysRevLett.128.132503",

language = "English",

volume = "128",

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TY - JOUR

T1 - Measurement of Compton Scattering at MAMI for the Extraction of the Electric and Magnetic Polarizabilities of the Proton

AU - (A2 Collaboration at MAMI)

AU - Mornacchi, E.

AU - Martel, P. P.

AU - Abt, S.

AU - Achenbach, P.

AU - Adlarson, P.

AU - Afzal, F.

AU - Ahmed, Z.

AU - Annand, J. R.M.

AU - Arends, H. J.

AU - Bashkanov, M.

AU - Beck, R.

AU - Biroth, M.

AU - Borisov, N.

AU - Braghieri, A.

AU - Briscoe, W. J.

AU - Cividini, F.

AU - Collicott, C.

AU - Costanza, S.

AU - Denig, A.

AU - Dolzhikov, A. S.

AU - Downie, E. J.

AU - Drexler, P.

AU - Fegan, S.

AU - Gardner, S.

AU - Ghosal, D.

AU - Glazier, D. I.

AU - Gorodnov, I.

AU - Gradl, W.

AU - Günther, M.

AU - Gurevich, D.

AU - Heijkenskjöld, L.

AU - Hornidge, D.

AU - Huber, G. M.

AU - Käser, A.

AU - Kashevarov, V. L.

AU - Kay, S. J.D.

AU - Korolija, M.

AU - Krusche, B.

AU - Lazarev, A.

AU - Livingston, K.

AU - Lutterer, S.

AU - Macgregor, I. J.D.

AU - Manley, D. M.

AU - Miskimen, R.

AU - Mocanu, M.

AU - Mullen, C.

AU - Neganov, A.

AU - Watts, D. P.

AU - Werthmüller, D.

AU - Zachariou, N.

N1 - © 2022 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details Funding Information: The authors wish to acknowledge the outstanding support of the accelerator group and operators of MAMI. We also wish to acknowledge and thank J. McGovern, V. Pascalutsa, and B. Pasquini for providing us with their theory codes, together with H. Grießhammer and M. Vanderhaegen for the theoretical contributions and support. This project has received funding from the European Unions Horizon 2020 research and innovation program under Grant Agreement No. 824093. This work has been supported by the U.K. STFC (ST/L005719/1, ST/P004458/1, ST/T002077/1,ST/P004385/2, ST/V002570/1, ST/P004008/1 and ST/L00478X/2) grants, the Deutsche Forschungsgemeinschaft (SFB443, SFB/TR16, and SFB1044), DFG-RFBR (Grant No. 09-02-91330), Schweizerischer Nationalfonds (Contracts No. 200020-175807, No. 200020-156983, No. 132799, No. 121781, No. 117601), the U.S. Department of Energy (Offices of Science and Nuclear Physics, Awards No. DE-SC0014323, No. DEFG02-99-ER41110, No. DE-FG02-88ER40415, No. DEFG02-01-ER41194) and National Science Foundation (Grants No. NSF OISE-1358175; No. PHY-1039130, No. PHY-1714833, No. PHY-2012940, No. IIA-1358175), INFN (Italy), and NSERC of Canada (Grant No. FRN-SAPPJ2015-00023).

PY - 2022/4/1

Y1 - 2022/4/1

N2 - A precise measurement of the differential cross sections dσ/dω and the linearly polarized photon beam asymmetry ς3 for Compton scattering on the proton below pion threshold has been performed with a tagged photon beam and almost 4π 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: αE1=10.99±0.16±0.47±0.17±0.34, βM1=3.14±0.21±0.24±0.20±0.35; in units of 10-4 fm3 where the errors are statistical, systematic, spin polarizability dependent, and model dependent.

AB - A precise measurement of the differential cross sections dσ/dω and the linearly polarized photon beam asymmetry ς3 for Compton scattering on the proton below pion threshold has been performed with a tagged photon beam and almost 4π 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: αE1=10.99±0.16±0.47±0.17±0.34, βM1=3.14±0.21±0.24±0.20±0.35; in units of 10-4 fm3 where the errors are statistical, systematic, spin polarizability dependent, and model dependent.

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U2 - 10.1103/PhysRevLett.128.132503

DO - 10.1103/PhysRevLett.128.132503

M3 - Article

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AN - SCOPUS:85127856004

SN - 0031-9007

VL - 128

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

M1 - 132503

ER -

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

Abstract

Bibliographical note

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Other files and links

Nuclear Physics Consolidated Grant 2021-2024

Cite this

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

Abstract

Bibliographical note

Access to Document

Other files and links

Projects

Nuclear Physics Consolidated Grant 2021-2024

Cite this