R. Akhunzyanov

activity

20112024

g_{1}^{p}

of the Proton and a Test of the Bjorken Sum Rule

127 citations · 1.4k across the 32 of their papers we have counts for

collaborators

32 papers

hep-ex2024★ 12 cited

Technical Design Report of the Spin Physics Detector at NICA

The SPD Collaboration, V. Abazov, V. Abramov +411

The Spin Physics Detector collaboration proposes to install a universal detector in the second interaction point of the NICA collider under construction (JINR, Dubna) to study the…

hep-ex2021★ 42 cited

Conceptual design of the Spin Physics Detector

V. M. Abazov, V. Abramov, L. G. Afanasyev +291

The Spin Physics Detector, a universal facility for studying the nucleon spin structure and other spin-related phenomena with polarized proton and deuteron beams, is proposed to be…

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★ 15 cited

K $^{-}$ over K $^{+}$ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

R. Akhunzyanov, M. G. Alexeev, G. D. Alexeev +207

The K $^{-}$ over K $^{+}$ multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction $z$ of the virtual-photon energy. The d…

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-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★ 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…

hep-ex2014★ 114 cited

Collins and Sivers asymmetries in muonproduction of pions and kaons off transversely polarised proton

C. Adolph, R. Akhunzyanov, M. G. Alexeev +205

Measurements of the Collins and Sivers asymmetries for charged pions and charged and neutral kaons produced in semi-inclusive deep-inelastic scattering of high energy muons off tra…

hep-ex2014★ 77 cited

Odd and Even Partial Waves of $η π^{-}$ and $η^{'} π^{-}$ in $π^{-} p \to η^{(')} π^{-} p$ at $191 GeV / c$

C. Adolph, R. Akhunzyanov, M. G. Alexeev +205

Exclusive production of $η π^{-}$ and $η^{'} π^{-}$ has been studied with a $191 GeV / c$ $π^{-}$ beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal d…

hep-ex2014★ 35 cited

Search for exclusive photoproduction of Z $_{c}^{\pm}$ (3900) at COMPASS

C. Adolph, R. Akhunzyanov, M. G. Alexeev +205

A search for the exclusive production of the $Z_{c}^{\pm} (3900)$ hadron by virtual photons has been performed in the channel $Z_{c}^{\pm} (3900) \to J / ψ π^{\pm}$ . The data cover t…

Technical Design Report of the Spin Physics Detector at NICA

Conceptual design of the Spin Physics Detector

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

K− over K+ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

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

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

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

Collins and Sivers asymmetries in muonproduction of pions and kaons off transversely polarised proton

Odd and Even Partial Waves of ηπ− and η′π− in π−p→η(′)π−p at 191GeV/c

Search for exclusive photoproduction of Zc±​(3900) at COMPASS

K $^{-}$ over K $^{+}$ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

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

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 $a_{1} (1420)$

Odd and Even Partial Waves of $η π^{-}$ and $η^{'} π^{-}$ in $π^{-} p \to η^{(')} π^{-} p$ at $191 GeV / c$

Search for exclusive photoproduction of Z $_{c}^{\pm}$ (3900) at COMPASS