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1.
Machine Learning-Assisted Measurement of Lepton-Jet Azimuthal Angular Asymmetries in Deep-Inelastic Scattering at HERA / H1 Collaboration
In deep-inelastic positron-proton scattering, the lepton-jet azimuthal angular asymmetry is measured using data collected with the H1 detector at HERA. [...]
arXiv:2412.14092 ; DESY24-200.
- 15.
Fulltext
2.
Measurement of lepton-jet correlation in deep-inelastic scattering with the H1 detector using machine learning for unfolding / H1 Collaboration
The first measurement of lepton-jet momentum imbalance and azimuthal correlation in lepton-proton scattering at high momentum transfer is presented. These data, taken with the H1 detector at HERA, are corrected for detector effects using an unbinned machine learning algorithm OmniFold, which considers eight observables simultaneously in this first application. [...]
arXiv:2108.12376; DESY 21-130.- 2022-03-31 - 17 p. - Published in : Phys. Rev. Lett. 128 (2022) 132002 Fulltext: PDF;
3.
Unbinned deep learning jet substructure measurement in high Q2ep collisions at HERA / H1 Collaboration
The radiation pattern within high energy quark- and gluon-initiated jets (jet substructure) is used extensively as a precision probe of the strong force as well as an environment for optimizing event generators with numerous applications in high energy particle and nuclear physics. Looking at electron-proton collisions is of particular interest as many of the complications present at hadron colliders are absent. [...]
arXiv:2303.13620; DESY-23-034.- 2023-07-31 - 25 p. - Published in : Phys. Lett. B 844 (2023) 138101 Fulltext: PDF;
4.
Combination of Differential D^{*\pm} Cross-Section Measurements in Deep-Inelastic ep Scattering at HERA / Abramowicz, H. (Tel Aviv U. ; Munich, Max Planck Inst.) ; Abt, I. (Munich, Max Planck Inst.) ; Adamczyk, L. (AGH-UST, Cracow) ; Adamus, M. (NCBJ, Swierk) ; Andreev, V. (Lebedev Inst.) ; Antonelli, S. (INFN, Bologna) ; Aushev, V. (Kiev, INR ; Taras Shevchenko U.) ; Aushev, Y. (Taras Shevchenko U. ; Kiev Polytechnic Inst.) ; Baghdasaryan, A. (Yerevan Phys. Inst.) ; Begzsuren, K. (Ulan Bator, Inst. Phys. Tech.) et al. /H1 Collaoration ; ZEUS Collaborations
H1 and ZEUS have published single-differential cross sections for inclusive D^{*\pm}-meson production in deep-inelastic ep scattering at HERA from their respective final data sets. These cross sections are combined in the common visible phase-space region of photon virtuality Q2 > 5 GeV2, electron inelasticity 0.02 < y < 0.7 and the D^{*\pm} meson's transverse momentum pT (D^*) > 1.5 GeV and pseudorapidity |eta(D^*)| < 1.5. [...]
arXiv:1503.06042; DESY-15-037; DESY-15-037.- 2015-09-22 - 37 p. - Published in : JHEP 09 (2015) 149 Article from SCOAP3: PDF; Fulltext: jt - PDF; arXiv:1503.06042 - PDF; Springer Open Access article: PDF; External links: Rivet analyses reference; Fermilab Library Server
5.
Observation and differential cross section measurement of neutral current DIS events with an empty hemisphere in the Breit frame / H1 Collaboration
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. [...]
arXiv:2403.08982; DESY-24-034.- 2024-07-22 - 13 p. - Published in : Eur. Phys. J. C 84 (2024) 720 Fulltext: document - PDF; 2403.08982 - PDF;
6.
Measurement of the cross-section ratio σ$_{ψ(2S)}$/σ$_{J/ψ(1S)}$ in exclusive photoproduction at HERA / ZEUS Collaboration
The exclusive photoproduction reactions $\gamma p \to J/\psi(1S) p$ and $\gamma p \to \psi(2S) p$ have been measured at an $ep$ centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb$^{-1}$. The measurement was made in the kinematic range $30 < W < 180$ GeV, $Q^2 < 1$ GeV$^2$ and $|t| < 1$ GeV$^2$, where $W$ is the photon--proton centre-of-mass energy, $Q^2$ is the photon virtuality and $t$ is the squared four-momentum transfer at the proton vertex. [...]
arXiv:2206.13343; DESY-22-107.- 2022-12-29 - 27 p. - Published in : JHEP 2212 (2022) 164 Fulltext: document - PDF; 2206.13343 - PDF;
7.
Measurement of groomed event shape observables in deep-inelastic electron-proton scattering at HERA / H1 Collaboration
The H1 Collaboration at HERA reports the first measurement of groomed event shape observables in deep inelastic electron-proton scattering (DIS) at $\sqrt{s}=319$ GeV, using data recorded between the years 2003 and 2007 with an integrated luminosity of $351$ pb$^{-1}$. Event shapes provide incisive probes of perturbative and non-perturbative QCD. [...]
arXiv:2403.10134; DESY-24-036.- 2024-07-22 - 32 p. - Published in : Eur. Phys. J. C 84 (2024) 718 Fulltext: document - PDF; 2403.10134 - PDF;
8.
Impact of jet-production data on the next-to-next-to-leading-order determination of HERAPDF2.0 parton distributions / H1 Collaboration
The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic $ep$ scattering together with jet data as published by the H1 and ZEUS collaborations. [...]
arXiv:2112.01120; DESY-21-206.- 2022-03-21 - 43 p. - Published in : Eur. Phys. J. C 82 (2022) 243 Fulltext: 2112.01120 - PDF; document - PDF;
9.
Measurement of the 1-jettiness event shape observable in deep-inelastic electron-proton scattering at HERA / H1 Collaboration
The H1 Collaboration reports the first measurement of the 1-jettiness event shape observable $\tau_1^b$ in neutral-current deep-inelastic electron-proton scattering (DIS). The observable $\tau_1^b$ is equivalent to a thrust observable defined in the Breit frame. [...]
arXiv:2403.10109; DESY-24-035.- 2024-08-07 - 42 p. - Published in : Eur. Phys. J. C 84 (2024) 785 Fulltext: document - PDF; 2403.10109 - PDF;
10.
Azimuthal correlations in photoproduction and deep inelastic $ep$ scattering at HERA / ZEUS Collaboration
Collective behaviour of final-state hadrons, and multiparton interactions are studied in high-multiplicity $ep$ scattering at a centre-of-mass energy $\sqrt{s}=318$ GeV with the ZEUS detector at HERA. Two- and four-particle azimuthal correlations, as well as multiplicity, transverse momentum, and pseudorapidity distributions for charged-particle multiplicities $N_{\textrm ch} \geq 20$ are measured. [...]
arXiv:2106.12377; DESY-21-099.- 2021-12-16 - 27 p. - Published in : JHEP 2112 (2021) 102 Fulltext: document - PDF; 2106.12377 - PDF;

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