Measurement of the cross section for hard exclusive π0 muoproduction on the proton
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24510%2F20%3A00008684" target="_blank" >RIV/46747885:24510/20:00008684 - isvavai.cz</a>
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 π0 muoproduction on the proton
Original language description
We report on a measurement of hard exclusive π muoproduction on the proton by COMPASS using 160 GeV/c polarised μ and μ beams of the CERN SPS impinging on a liquid hydrogen target. From the average of the measured μ and μ 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) =2.0(GeV/c) , =12.8GeV, =0.093 and =0.256(GeV/c) . Fitting the azimuthal dependence reveals a combined contribution by transversely and longitudinally polarised photons of (8.2±0.9;)nb/(GeV/c) , as well as transverse-transverse and longitudinal-transverse interference contributions of (−6.1±1.3;)nb/(GeV/c) and (1.5±0.5;)nb/(GeV/c) , respectively. Our results provide important input for modelling Generalised Parton Distributions. In the context of the phenomenological Goloskokov-Kroll model, the statistically significant transverse-transverse interference contribution constitutes clear experimental evidence for the chiral-odd GPD E_T.
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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
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, Section B: Nuclear, Elementary Particle and High-Energy Physics
ISSN
0370-2693
e-ISSN
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Volume of the periodical
805
Issue of the periodical within the volume
5
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
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UT code for WoS article
000541379800025
EID of the result in the Scopus database
2-s2.0-85084498386