Measurement of the cross section for hard exclusive pi(0) muoproduction on the proton
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F20%3A00532103" target="_blank" >RIV/68081731:_____/20:00532103 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21230/20:00344588 RIV/68407700:21340/20:00344588 RIV/00216208:11320/20:10414846
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0370269320302586" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0370269320302586</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2020.135454" target="_blank" >10.1016/j.physletb.2020.135454</a>
Alternative languages
Result language
angličtina
Original language name
Measurement of the cross section for hard exclusive pi(0) muoproduction on the proton
Original language description
We report on a measurement of hard exclusive pi(0) muoproduction on the proton by COMPASS using 160GeV/cpolarised mu+ and mu- beams of the CERN SPS impinging on a liquid hydrogen target. From the average of the measured mu+ and mu- cross sections, the virtual-photon proton cross section is determined as a function of the squared four-momentum transfer between initial and final proton in the range 0.08 (GeV/c)(2) <vertical bar t vertical bar < 0.64 (GeV/c)(2). The average kinematics of the measurement are Q(2) = 2.0 (GeV/c)(2), nu = 12.8 GeV, x(Bj) = 0.093andt = 0.256 (GeV/c)(2). Fitting the azimuthal dependence reveals a combined contribution by transversely and longitudinally polarised photons of (8.2 +/- 0.9(stat-1.2)(+1.2)vertical bar(sys)) nb/(GeV/c)(2), as well as transverse-transverse and longitudinal-transverse interference contributions of (-6.1 +/- 1.3(stat- 0.7)(+0.7) vertical bar sys) nb/(GeV/c)(2) and (1.5 +/- 0.5(stat-0.2)(+ 0.3) vertical bar(sys)) nb/(GeV/c)(2), respectively. Our results provide important input for modelling Generalised Parton Distributions. In the context of the phenomenological Goloskokov-Kroll model, the statistically significant transversetransverse interference contribution constitutes clear experimental evidence for the chiral-odd GPD ET. (C) 2020 The Author(s). Published by Elsevier B.V.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
<a href="/en/project/LM2015058" target="_blank" >LM2015058: Research Infrastructure for Experiments at CERN</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics Letters. B
ISSN
0370-2693
e-ISSN
—
Volume of the periodical
805
Issue of the periodical within the volume
JUN
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
135454
UT code for WoS article
000541379800025
EID of the result in the Scopus database
2-s2.0-85084498386