Observation and differential cross section measurement of neutral current DIS events with an empty hemisphere in the Breit frame
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00599013" target="_blank" >RIV/68378271:_____/24:00599013 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/24:10495195 RIV/61989592:15310/24:73628491
Result on the web
<a href="https://hdl.handle.net/11104/0356583" target="_blank" >https://hdl.handle.net/11104/0356583</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjc/s10052-024-13003-1" target="_blank" >10.1140/epjc/s10052-024-13003-1</a>
Alternative languages
Result language
angličtina
Original language name
Observation and differential cross section measurement of neutral current DIS events with an empty hemisphere in the Breit frame
Original language description
The Breit frame provides a natural frame to analyze lepton–proton scattering events. In this reference frame, the parton model hard interactions between a quark and an exchanged boson defines the coordinate system such that the struck quark is back-scattered along the virtual photon momentum direction. In Quantum Chromodynamics (QCD), higher order perturbative or non-perturbative effects can change this picture drastically. As Bjorken-x decreases below one half, a rather peculiar event signature is predicted with increasing probability, where no radiation is present in one of the two Breit-frame hemispheres and all emissions are to be found in the other hemisphere. At higher orders in αs or in the presence of soft QCD effects, predictions of the rate of these events are far from trivial, and that motivates measurements with real data. We report on the first observation of the empty current hemisphere events in electron–proton collisions at the HERA collider using data recorded with the H1 detector at a center-of-mass energy of 319GeV. The fraction of inclusive neutral-current DIS events with an empty hemisphere is found to be 0.0112 ±3.9%stat ± 4.5%syst ± 1.6%mod in the selected kinematic region of 150 < Q2 < 1500GeV2 and inelasticity 0.14 < y < 0.7. The data sample corresponds to an integrated luminosity of 351.1pb−1, sufficient to enable differential cross section measurements of these events. The results show an enhanced discriminating power at lower Bjorken-x among different Monte Carlo event generator predictions.
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/LG14033" target="_blank" >LG14033: Czech collaboration on the projects H1 and CALICE</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Physical Journal C
ISSN
1434-6044
e-ISSN
1434-6052
Volume of the periodical
84
Issue of the periodical within the volume
7
Country of publishing house
DE - GERMANY
Number of pages
11
Pages from-to
720
UT code for WoS article
001366802800005
EID of the result in the Scopus database
2-s2.0-85199469726