M. Levillain

activity

20142019

g_{1}^{p}

of the Proton and a Test of the Bjorken Sum Rule

127 citations · 1.3k across the 28 of their papers we have counts for

collaborators

28 papers

nucl-ex2019★ 5 cited

High Precision Measurement of Compton Scattering in the 5 GeV region

P. Ambrozewicz, L. Ye, Y. Prok +94

The cross section of atomic electron Compton scattering $γ + e \to γ^{'} + e^{'}$ was measured in the 4.40--5.475 GeV photon beam energy region by the {\em PrimEx} co…

hep-ex2018★ 76 cited

Light isovector resonances in $π^{-} p \to π^{-} π^{-} π^{+} p$ at 190 GeV/ $c$

M. Aghasyan, M. G. Alexeev, G. D. Alexeev +221

We have performed the most comprehensive resonance-model fit of $π^{-} π^{-} π^{+}$ states using the results of our previously published partial-wave analysis (PWA) of a large data set of…

hep-ex2018★ 47 cited

Transverse Extension of Partons in the Proton probed by Deeply Virtual Compton Scattering

R. Akhunzyanov, M. G. Alexeev, G. D. Alexeev +223

We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/ $c$ polarized $μ^{+}$ and $μ^{-}$ beams of the CERN SPS impinging on…

hep-ex2018

First measurement of transverse-spin-dependent azimuthal asymmetries in the Drell-Yan process

Bakur Parsamyan

The COMPASS experiment at CERN, as part of its programme addresses the exploration of the transverse spin structure of the nucleon by measuring spin (in)dependent azimuthal asymmet…

hep-ex2017★ 28 cited

Longitudinal double-spin asymmetry $A_{1}^{p}$ and spin-dependent structure function $g_{1}^{p}$ of the proton at small values of $x$ and $Q^{2}$

M. Aghasyan, R. Akhunzyanov, M. G. Alexeev +225

We present a precise measurement of the proton longitudinal double-spin asymmetry $A_{1}^{p}$ and the proton spin-dependent structure function $g_{1}^{p}$ at photon virtualitie…

hep-ex2017★ 60 cited

Transverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering

M. Aghasyan, R. Akhunzyanov, M. G. Alexeev +227

A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaborat…

hep-ex2017★ 4 cited

Strange Hadron Spectroscopy with a Secondary KL Beam at GlueX

M. J. Amaryan, M. Bashkanov, J. Ritman +3

We propose to create a secondary beam of neutral kaons in Hall D at Jefferson Lab to be used with the GlueX experimental setup for strange hadron spectroscopy. A flux on the order…

hep-ph2017★ 18 cited

New analysis of $η π$ tensor resonances measured at the COMPASS experiment

A. Jackura, C. Fernandez-Ramirez, M. Mikhasenko +232

We present a new amplitude analysis of the $η π$ $D$ -wave in $π^{-} p \to η π^{-} p$ measured by COMPASS. Employing an analytical model based on the principles of the relativistic $S$ -mat…

hep-ex2017★ 32 cited

Search for muoproduction of $X (3872)$ at COMPASS and indication of a new state $X (3872)$

M. Aghasyan, R. Akhunzyanov, M. G. Alexeev +224

We have searched for exclusive production of exotic charmonia in the reaction $μ^{+} N \to μ^{+} (J / ψ π^{+} π^{-}) π^{\pm} N^{'}$ using COMPASS data collected with incoming muons of…

hep-ex2017★ 122 cited

First measurement of transverse-spin-dependent azimuthal asymmetries in the Drell-Yan process

Aghasyan, R. Akhunzyanov, M. G. Alexeev +216

The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use the CERN SPS 190 GeV/ $c$ , $π^{-}$ beam and a…

hep-ex2017★ 34 cited

First measurement of the Sivers asymmetry for gluons from SIDIS data

C. Adolph, M. Aghasyan, R. Akhunzyanov +223

The Sivers function describes the correlation between the transverse spin of a nucleon and the transverse motion of its partons. It was extracted from measurements of the azimuthal…

hep-ex2016★ 53 cited

Final COMPASS results on the deuteron spin-dependent structure function $g_{1}^{d}$ and the Bjorken sum rule

C. Adolph, M. Aghasyan, R. Akhunzyanov +223

Final results are presented from the inclusive measurement of deep-inelastic polarised-muon scattering on longitudinally polarised deuterons using a $^{6}$ LiD target. The data were t…

hep-ex2016★ 55 cited

Sivers asymmetry extracted in SIDIS at the hard scale of the Drell-Yan process at COMPASS

C. Adolph, M. Aghasyan, R. Akhunzyanov +223

Proton transverse-spin azimuthal asymmetries are extracted from the COMPASS 2010 semi-inclusive hadron measurements in deep inelastic muon-nucleon scattering in those four regions…

hep-ex2016★ 20 cited

Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons

C. Adolph, M. Aghasyan, R. Akhunzyanov +221

Single hadron azimuthal asymmetries of positive and negative hadrons produced in muon semi-inclusive deep inelastic scattering off longitudinally polarised deuterons are determined…

hep-ex2016★ 47 cited

Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target

C. Adolph, J. Agarwala, M. Aghasyan +223

Precise measurements of charged-kaon multiplicities in deep inelastic scattering were performed. The results are presented in three-dimensional bins of the Bjorken scaling variable…

hep-ex2016★ 12 cited

Exclusive $ω$ meson muoproduction on transversely polarised protons

C. Adolph, J. Agarwala, M. Aghasyan +225

Exclusive production of $ω$ mesons was studied at the COMPASS experiment by scattering $160 GeV / c$ muons off transversely polarised protons. Five single-spin and…

hep-ex2016★ 52 cited

Multiplicities of charged pions and unidentified charged hadrons from deep-inelastic scattering of muons off an isoscalar target

C. Adolph, J. Agarwala, M. Aghasyan +224

Multiplicities of charged pions and unidentified hadrons produced in deep-inelastic scattering were measured in bins of the Bjorken scaling variable $x$ , the relative virtual-photo…

hep-ex2015

$A_{LL} (p_{T})$ for single hadron photoproduction at high $p_{T}$

Maxime Levillain

In order to understand the gluon contribution to the nucleon spin, some experiments can study the production of hadrons at high transverse momemtum from lepton-nucleon or nucleon-n…

hep-ex2015★ 3 cited

Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high $p_{T}$

COMPASS Collaboration, C. Adolph, R. Akhunzyanov +207

We measured the longitudinal double spin asymmetries $A_{LL}$ for single hadron muo-production off protons and deuterons at photon virtuality $Q^{2}$ < 1(GeV/ $c$ ) $^{2}$ for transve…

hep-ex2015★ 57 cited

Resonance Production and $π π$ S-wave in $π^{-} + p \to π^{-} π^{-} π^{+} + p_{r eco i l}$ at 190 GeV/c

C. Adolph, R. Akhunzyanov, M. G. Alexeev +206

The COMPASS collaboration has collected the currently largest data set on diffractively produced $π^{-} π^{-} π^{+}$ final states using a negative pion beam of 190 GeV/c momentum impinging…

hep-ex2015★ 14 cited

Interplay among transversity induced asymmetries in hadron leptoproduction

Compass Collaboration, C. Adolph, R. Akhunzyanov +206

In the fragmentation of a transversely polarized quark several left-right asymmetries are possible for the hadrons in the jet. When only one unpolarized hadron is selected, it exhi…

hep-ex2015★ 127 cited

The Spin Structure Function $g_{1}^{p}$ of the Proton and a Test of the Bjorken Sum Rule

C. Adolph, R. Akhunzyanov, M. G. Alexeev +203

New results for the double spin asymmetry $A_{1}^{p}$ and the proton longitudinal spin structure function $g_{1}^{p}$ are presented. They were obtained by the COMPASS collabora…

hep-ex2015★ 75 cited

Observation of a new narrow axial-vector meson $a_{1} (1420)$

C. Adolph, R. Akhunzyanov, M. G. Alexeev +201

The COMPASS collaboration at CERN has measured diffractive dissociation of 190 GeV/ $c$ pions into the $π^{-} π^{-} π^{+}$ final state using a stationary hydrogen target. A partial-wave ana…

physics.ins-det2014★ 78 cited

The COMPASS Setup for Physics with Hadron Beams

Ph. Abbon, C. Adolph, R. Akhunzyanov +228

The main characteristics of the COMPASS experimental setup for physics with hadron beams are described. This setup was designed to perform exclusive measurements of processes with…

High Precision Measurement of Compton Scattering in the 5 GeV region

Light isovector resonances in π−p→π−π−π+p at 190 GeV/c

Transverse Extension of Partons in the Proton probed by Deeply Virtual Compton Scattering

First measurement of transverse-spin-dependent azimuthal asymmetries in the Drell-Yan process

Longitudinal double-spin asymmetry A1p​ and spin-dependent structure function g1p​ of the proton at small values of x and Q2

Transverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering

Strange Hadron Spectroscopy with a Secondary KL Beam at GlueX

New analysis of ηπ tensor resonances measured at the COMPASS experiment

Search for muoproduction of X(3872) at COMPASS and indication of a new state X(3872)

First measurement of transverse-spin-dependent azimuthal asymmetries in the Drell-Yan process

First measurement of the Sivers asymmetry for gluons from SIDIS data

Final COMPASS results on the deuteron spin-dependent structure function g1d​ and the Bjorken sum rule

Sivers asymmetry extracted in SIDIS at the hard scale of the Drell-Yan process at COMPASS

Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons

Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target

Exclusive ω meson muoproduction on transversely polarised protons

Multiplicities of charged pions and unidentified charged hadrons from deep-inelastic scattering of muons off an isoscalar target

ALL​(pT​) for single hadron photoproduction at high pT​

Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high pT​

Resonance Production and ππ S-wave in π−+p→π−π−π++precoil​ at 190 GeV/c

Interplay among transversity induced asymmetries in hadron leptoproduction

The Spin Structure Function g1p​ of the Proton and a Test of the Bjorken Sum Rule

Observation of a new narrow axial-vector meson a1​(1420)

The COMPASS Setup for Physics with Hadron Beams

Light isovector resonances in $π^{-} p \to π^{-} π^{-} π^{+} p$ at 190 GeV/ $c$

Longitudinal double-spin asymmetry $A_{1}^{p}$ and spin-dependent structure function $g_{1}^{p}$ of the proton at small values of $x$ and $Q^{2}$

New analysis of $η π$ tensor resonances measured at the COMPASS experiment

Search for muoproduction of $X (3872)$ at COMPASS and indication of a new state $X (3872)$

Final COMPASS results on the deuteron spin-dependent structure function $g_{1}^{d}$ and the Bjorken sum rule

Exclusive $ω$ meson muoproduction on transversely polarised protons

$A_{LL} (p_{T})$ for single hadron photoproduction at high $p_{T}$

Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high $p_{T}$

Resonance Production and $π π$ S-wave in $π^{-} + p \to π^{-} π^{-} π^{+} + p_{r eco i l}$ at 190 GeV/c

The Spin Structure Function $g_{1}^{p}$ of the Proton and a Test of the Bjorken Sum Rule

Observation of a new narrow axial-vector meson $a_{1} (1420)$