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Title: Proton Compton Scattering from Linearly Polarized Gamma Rays

Journal Article · · Physical Review Letters
ORCiD logo [1];  [2];  [3];  [4];  [2];  [5];  [6];  [5];  [7];  [8];  [9];  [7];  [4];  [7];  [8];  [10];  [2];  [11];  [6];  [12] more »;  [13];  [4];  [14];  [15];  [6];  [6];  [7];  [3];  [7];  [7] « less
  1. Duke Univ., Durham, NC (United States); Triangle Universities Nuclear Lab., Durham, NC (United States); North Carolina Central University
  2. Triangle Universities Nuclear Lab., Durham, NC (United States); North Carolina Central Univ., Durham, NC (United States)
  3. James Madison Univ., Harrisonburg, VA (United States)
  4. Triangle Universities Nuclear Lab., Durham, NC (United States); Univ. of North Carolina, Chapel Hill, NC (United States)
  5. George Washington Univ., Washington, DC (United States)
  6. Triangle Universities Nuclear Lab., Durham, NC (United States)
  7. Duke Univ., Durham, NC (United States); Triangle Universities Nuclear Lab., Durham, NC (United States)
  8. Univ. of Kentucky, Lexington, KY (United States)
  9. George Washington Univ., Washington, DC (United States); Duke Univ., Durham, NC (United States)
  10. Duke Univ., Durham, NC (United States); Triangle Universities Nuclear Lab., Durham, NC (United States); Montclair State Univ., NJ (United States)
  11. Univ. of Manchester (United Kingdom)
  12. Univ. of Saskatchewan, Saskatoon, SK (Canada)
  13. George Washington Univ., Washington, DC (United States); Triangle Universities Nuclear Lab., Durham, NC (United States)
  14. North Carolina Central Univ., Durham, NC (United States)
  15. Univ. of North Georgia, Dahlonega, GA (United States)

In this work, differential cross sections for Compton scattering from the proton have been measured at scattering angles of 55°, 90°, and 125° in the laboratory frame using quasimonoenergetic linearly (circularly) polarized photon beams with a weighted mean energy value of 83.4 MeV (81.3 MeV). These measurements were performed at the High Intensity Gamma-Ray Source facility at the Triangle Universities Nuclear Laboratory. The results are compared to previous measurements and are interpreted in the chiral effective field theory framework to extract the electromagnetic dipole polarizabilities of the proton, which gives $$α^p_{E1} = 13.8 ± 1.2_{\text{stat}} ± 0.1_{\text{BSR}} ± 0. 3_{\text{theo}} , β^p_{M1} = 0.2 ∓ 1. 2_{\text{stat}} ± 0. 1_{\text{BSR}} ∓ 0. 3_{\text{theo}}$$ in units of $$10^{–4}$$ fm$^3$ .

Research Organization:
North Carolina Central Univ., Durham, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); Science and Technology Facilities Council (STFC); Natural Sciences and Engineering Research Council of Canada (NSERC)
Grant/Contract Number:
SC0005367; FG02-03ER41231; FG02-97ER41033; FG02-97ER41041; FG02-97ER41046; FG02-97ER41042; SC0005367; SC0015393; SC0016581; SC0016656
OSTI ID:
1863417
Alternate ID(s):
OSTI ID: 1863662; OSTI ID: 1865832; OSTI ID: 1907564; OSTI ID: 1908352
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 128; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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