S. Levonian
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View article: Machine Learning-Assisted Measurement of Lepton-Jet Azimuthal Angular Asymmetries in Deep-Inelastic Scattering at HERA
Machine Learning-Assisted Measurement of Lepton-Jet Azimuthal Angular Asymmetries in Deep-Inelastic Scattering at HERA Open
In deep-inelastic positron-proton scattering, the lepton-jet azimuthal angular asymmetry is measured using data collected with the H1 detector at HERA. When the average transverse momentum of the lepton-jet system, $\lvert \vec{P}_\perp \r…
View article: Measurement of the 1-jettiness event shape observable in deep-inelastic electron-proton scattering at HERA
Measurement of the 1-jettiness event shape observable in deep-inelastic electron-proton scattering at HERA Open
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…
View article: Measurement of groomed event shape observables in deep-inelastic electron-proton scattering at HERA
Measurement of groomed event shape observables in deep-inelastic electron-proton scattering at HERA Open
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 i…
View article: Observation and differential cross section measurement of neutral current DIS events with an empty hemisphere in the Breit frame
Observation and differential cross section measurement of neutral current DIS events with an empty hemisphere in the Breit frame Open
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 quar…
View article: Measurement of the 1-jettiness event shape observable in deep-inelastic electron-proton scattering at HERA
Measurement of the 1-jettiness event shape observable in deep-inelastic electron-proton scattering at HERA Open
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 de…
View article: Observation and differential cross section measurement of neutral current DIS events with an empty hemisphere in the Breit frame
Observation and differential cross section measurement of neutral current DIS events with an empty hemisphere in the Breit frame Open
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 qua…
View article: Data Preservation in High Energy Physics
Data Preservation in High Energy Physics Open
Data preservation is a mandatory specification for any present and future experimental facility and it is a cost-effective way of doing fundamental research by exploiting unique data sets in the light of the continuously increasing theoret…
View article: Measurement of Lepton-Jet Correlation in Deep-Inelastic Scattering with the H1 Detector Using Machine Learning for Unfolding
Measurement of Lepton-Jet Correlation in Deep-Inelastic Scattering with the H1 Detector Using Machine Learning for Unfolding Open
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 a…
View article: Measurement of lepton-jet correlation in deep-inelastic scattering with the H1 detector using machine learning for unfolding
Measurement of lepton-jet correlation in deep-inelastic scattering with the H1 detector using machine learning for unfolding Open
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 a…
View article: arXiv : Measurement of lepton-jet correlation in deep-inelastic scattering with the H1 detector using machine learning for unfolding
arXiv : Measurement of lepton-jet correlation in deep-inelastic scattering with the H1 detector using machine learning for unfolding Open
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 a…
View article: Preservation through modernisation: The software of the H1 experiment at HERA
Preservation through modernisation: The software of the H1 experiment at HERA Open
\nThe lepton–proton collisions produced at the HERA collider represent a unique high energy physics data set. A number of years after the end of collisions, the data collected by the H1 experiment, as well as the simulated events and all s…
View article: Erratum to: Determination of the strong coupling constant $${{\varvec{\alpha _{\mathrm{s}} (m_{\mathrm{Z}})}}}$$ in next-to-next-to-leading order QCD using H1 jet cross section measurements
Erratum to: Determination of the strong coupling constant $${{\varvec{\alpha _{\mathrm{s}} (m_{\mathrm{Z}})}}}$$ in next-to-next-to-leading order QCD using H1 jet cross section measurements Open
The determination of the strong coupling constant $$\alpha _{\mathrm{s}} (m_{\mathrm{Z}})$$ from H1 inclusive and dijet cross section data [1] exploits perturbative QCD predictions in next-to-next-to-leading order (NNLO) [2–4]. …
View article: Determination of electroweak parameters in polarised deep-inelastic scattering at HERA
Determination of electroweak parameters in polarised deep-inelastic scattering at HERA Open
The parameters of the electroweak theory are determined in a combined electroweak and QCD analysis using all deep-inelastic $e^+p$ and $e^-p$ neutral current and charged current scattering cross sections published by the H1 Collaboration, …
View article: Determination of the strong coupling constant $${\varvec{{\alpha _\mathrm{s} (m_\mathrm{Z})}}}$$ in next-to-next-to-leading order QCD using H1 jet cross section measurements
Determination of the strong coupling constant $${\varvec{{\alpha _\mathrm{s} (m_\mathrm{Z})}}}$$ in next-to-next-to-leading order QCD using H1 jet cross section measurements Open
The strong coupling constant $$\alpha _\mathrm{s}$$ is determined from inclusive jet and dijet cross sections in neutral-current deep-inelastic ep scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading ord…
View article: Migrating the Belle II collaborative services and tools
Migrating the Belle II collaborative services and tools Open
The Belle II collaboration decided in 2016 to migrate its collaborative services and tools into the existing IT infrastructure at DESY. The goal was to reduce the maintenance effort for solutions operated by Belle II members as well as to …
View article: Determination of the strong coupling constant $\alpha_s(M_Z)$ in next-to-next-to-leading order QCD using H1 jet cross section measurements
Determination of the strong coupling constant $\alpha_s(M_Z)$ in next-to-next-to-leading order QCD using H1 jet cross section measurements Open
The strong coupling constant $\alpha_s(M_Z)$ is determined from inclusive jet and dijet cross sections in neutral-current deep-inelastic $ep$ scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading order (NN…
View article: Exclusive $\rho^0$ Meson Photoproduction with a Leading Neutron at HERA
Exclusive $\rho^0$ Meson Photoproduction with a Leading Neutron at HERA Open
A first measurement is presented of exclusive photoproduction of $\rho^0$ mesons associated with leading neutrons at HERA. The data were taken with the H1 detector in the years 2006 and 2007 at a centre-of-mass energy of 319 GeV and corres…
View article: Exclusive $\rho^0$ Meson Photoproduction with a Leading Neutron at HERA
Exclusive $\rho^0$ Meson Photoproduction with a Leading Neutron at HERA Open
A first measurement is presented of exclusive photoproduction of $\\rho^0$\nmesons associated with leading neutrons at HERA. The data were taken with the\nH1 detector in the years 2006 and 2007 at a centre-of-mass energy of 319 GeV\nand co…
View article: Exclusive $ρ^0$ Meson Photoproduction with a Leading Neutron at HERA
Exclusive $ρ^0$ Meson Photoproduction with a Leading Neutron at HERA Open
A first measurement is presented of exclusive photoproduction of $ρ^0$ mesons associated with leading neutrons at HERA. The data were taken with the H1 detector in the years 2006 and 2007 at a centre-of-mass energy of 319 GeV and correspon…
View article: Search for QCD instanton-induced processes at HERA in the high- $$\pmb {Q^2}$$ Q 2 domain
Search for QCD instanton-induced processes at HERA in the high- $$\pmb {Q^2}$$ Q 2 domain Open
Signals of QCD instanton-induced processes are searched for in neutral current deep-inelastic scattering at the electron-proton collider HERA in the kinematic region defined by the Bjorken-scaling variable $x > 10^{-3}$, the inelasticity $…
View article: Summary of workshop on Future Physics with HERA Data
Summary of workshop on Future Physics with HERA Data Open
Recent highlights from the HERA experiments, Hermes, H1 and ZEUS, are reviewed and ideas for future analyses to fully exploit this unique data set are proposed. This document is a summary of a workshop on future physics with HERA data held…