Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section
| Parent link: | Physics Letters B Vol. 793.— 2019.— [P. 188-194] |
|---|---|
| Corporate Author: | |
| Other Authors: | , , , , , , , , |
| Summary: | Title screen We report on the first measurement of exclusive single-photon 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. We determine the dependence of the average of the measured μ+ and μ− cross sections for deeply virtual Compton scattering on the squared four-momentum transfer t from the initial to the final proton. The slope B of the t-dependence is fitted with a single exponential function, which yields B=(4.3±0.6stat|sys−0.3+0.1)(GeV/c)−2. This result can be converted into a transverse extension of partons in the proton, 〈r⊥2〉=(0.58±0.04stat|sys−0.02+0.01±0.04model)fm. For this measurement, the average virtuality of the photon mediating the interaction is 〈Q2〉=1.8(GeV/c)2 and the average value of the Bjorken variable is 〈xBj〉=0.056. |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://doi.org/10.1016/j.physletb.2019.04.038 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=661239 |
MARC
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| 200 | 1 | |a Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section |f R. R. Akhunzyanov [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References.: 38 tit.] | ||
| 330 | |a We report on the first measurement of exclusive single-photon 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. We determine the dependence of the average of the measured μ+ and μ− cross sections for deeply virtual Compton scattering on the squared four-momentum transfer t from the initial to the final proton. The slope B of the t-dependence is fitted with a single exponential function, which yields B=(4.3±0.6stat|sys−0.3+0.1)(GeV/c)−2. This result can be converted into a transverse extension of partons in the proton, 〈r⊥2〉=(0.58±0.04stat|sys−0.02+0.01±0.04model)fm. For this measurement, the average virtuality of the photon mediating the interaction is 〈Q2〉=1.8(GeV/c)2 and the average value of the Bjorken variable is 〈xBj〉=0.056. | ||
| 461 | |t Physics Letters B | ||
| 463 | |t Vol. 793 |v [P. 188-194] |d 2019 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a quantum chromodynamics | |
| 610 | 1 | |a deep inelastic scattering | |
| 610 | 1 | |a exclusive reactions | |
| 610 | 1 | |a deeply virtual compton scattering | |
| 610 | 1 | |a generalized parton distributions | |
| 610 | 1 | |a proton size | |
| 610 | 1 | |a COMPASS | |
| 610 | 1 | |a квантовая хромодинамика | |
| 610 | 1 | |a глубоконеупругое рассеяние | |
| 610 | 1 | |a эксклюзивные компетенции | |
| 610 | 1 | |a рассеяние | |
| 701 | 1 | |a Akhunzyanov |b R. R. |g Ruslan Rustyamovich | |
| 701 | 1 | |a Alekseev |b M. G. |g Maksim | |
| 701 | 1 | |a Burtsev |b V. E. |c mathematician |c Senior Lecturer of Tomsk Polytechnic University |f 1991- |g Vitaly Evgenjevich |3 (RuTPU)RU\TPU\pers\38282 | |
| 701 | 1 | |a Chumakov |b A. G. |c physicist |c laboratory assistant-researcher of Tomsk Polytechnic University |f 1992- |g Aleksandr Grigorjevich |3 (RuTPU)RU\TPU\pers\41079 | |
| 701 | 1 | |a Dusaev |b R. R. |c specialist in the field of nuclear physics |c Engineer of Tomsk Polytechnic University |f 1988- |g Renat Ramilyevich |3 (RuTPU)RU\TPU\pers\30972 |9 15210 | |
| 701 | 1 | |a Levchenko |b E. A. |c mathematician |c technician, Senior Lecturer of Tomsk Polytechnic University, candidate of physico-mathematical Sciences |f 1988- |g Evgeny Anatolievich |3 (RuTPU)RU\TPU\pers\31735 | |
| 701 | 1 | |a Lyubovitskiy (Lyubovitskij) |b V. E. |c physicist |c Professor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences, Professor of the University of Tubingen (Germany) |f 1963- |g Valery Efimovich |3 (RuTPU)RU\TPU\pers\33385 |9 17080 | |
| 701 | 1 | |a Mamon |b S. A. |c physicist |c laboratory assistant-researcher of Tomsk Polytechnic University |f 1989- |g Sergey Aleksandrovich |3 (RuTPU)RU\TPU\pers\43559 | |
| 701 | 1 | |a Vasilishin |b B. I. |c engineer-physicist |c laboratory researcher at Tomsk Polytechnic University |f 1990- |g Bogdan Ivanovich |3 (RuTPU)RU\TPU\pers\37572 |9 20428 | |
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| 856 | 4 | |u https://doi.org/10.1016/j.physletb.2019.04.038 | |
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