345 citations · 1.3k across the 25 of their papers we have counts for
25 papers
First Observation of an Exotic Reggeon
G. D. Alexeev, M. G. Alexeev, C. Alice +180
We present new \compass high-statistics measurements of the peripheral production of and pairs in the reactions . For the first t…
Dihadron Transverse-Spin Asymmetries in Muon-Deuteron Deep-Inelastic Scattering
G. D. Alexeev, M. G. Alexeev, C. Alice +168
In 2022, the COMPASS collaboration performed semi-inclusive measurements of deep-inelastic muon-scattering on a transversely polarised deuteron (6LiD) target. From these data, tran…
Spectroscopy of Strange Mesons and First Observation of a Strange Crypto-Exotic State with
G. D. Alexeev, M. G. Alexeev, C. Alice +160
We measured the strange-meson spectrum in the scattering reaction with the COMPASS spectrometer at CERN. Using the world's largest sample of…
Measurement of the hard exclusive muoproduction cross section at COMPASS
G. D. Alexeev, M. G. Alexeev, C. Alice +169
A new and detailed measurement of the cross section for hard exclusive neutral-pion muoproduction on the proton was performed in a wide kinematic region, with the photon virtuality…
High-statistics measurement of Collins and Sivers asymmetries for transversely polarised deuterons
G. D. Alexeev, M. G. Alexeev, C. Alice +183
New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely pol…
Final COMPASS results on the transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan process
G. D. Alexeev, M. G. Alexeev, C. Alice +180
The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c beam impinging on a transversely polarised ammonia target. Comb…
Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering
The COMPASS Collaboration
A set of measurements of azimuthal asymmetries in the production of pairs of identified hadrons in deep-inelastic scattering of muons on transversely polarised LiD (deuteron) a…
Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of mesons
G. D. Alexeev, M. G. Alexeev, C. Alice +188
The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related p…
Spin Density Matrix Elements in Exclusive Meson Muoproduction
G. D. Alexeev, M. G. Alexeev, C. Alice +186
We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive meson muoproduction at COMPASS using 160~GeV/ polarised and beams im…
Multiple Coulomb Scattering of muons in Lithium Hydride
M. Bogomilov, R. Tsenov, G. Vankova-Kirilova +134
Multiple Coulomb Scattering (MCS) is a well known phenomenon occurring when charged particles traverse materials. Measurements of muons traversing low materials made in the MuS…
Double production in pion-nucleon scattering at COMPASS
G. D. Alexeev, M. G. Alexeev, A. Amoroso +191
We present the study of the production of double mesons using COMPASS data collected with a 190 GeV/ beam scattering off NH, Al and W targets. Kinematic distri…
Proton inelastic scattering reveals deformation in He
M. Holl, R. Kanungo, Z. H. Sun +27
A measurement of proton inelastic scattering of He at ~MeV at TRIUMF shows a resonance at 3.54(6)~MeV with a width of 0.89(11)~MeV. The energy of the state is in good ag…
Probing transversity by measuring polarisation in SIDIS
M. G. Alexeev, G. D. Alexeev, A. Amoroso +196
Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production in Semi-Inclusive measurements of Deep Inelastic Scattering (SID…
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/ polarized and beams of the CERN SPS impinging on…
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 of the virtual-photon energy. The d…
Search for muoproduction of at COMPASS and indication of a new state
M. Aghasyan, R. Akhunzyanov, M. G. Alexeev +224
We have searched for exclusive production of exotic charmonia in the reaction using COMPASS data collected with incoming muons of…
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/, beam and a…
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…
Search for exclusive photoproduction of Z(3900) at COMPASS
C. Adolph, R. Akhunzyanov, M. G. Alexeev +205
A search for the exclusive production of the hadron by virtual photons has been performed in the channel . The data cover t…
Transverse target spin asymmetries in exclusive muoproduction
C. Adolph, M. G. Alekseev, V. Yu. Alexakhin +209
Exclusive production of mesons was studied at the COMPASS experiment by scattering 160 GeV/ muons off transversely polarised protons. Five single-spin and three double-spi…
Flavour Separation of Helicity Distributions from Deep Inelastic Muon-Deuteron Scattering
COMPASS Collaboration, M. Alekseev
We present a LO evaluation of helicity densities of valence, Δu_v+Δd_v, non-strange sea, Δ\bar{u}+Δ\bar{d}, and strange quarks, Δs (assumed to be equal to Δ\bar{s}). They have been…
A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target
Compass, :, E. S. Ageev
New high precision measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarised 6LiD target are…
Spin Structure of the Proton from Polarized Inclusive Deep-Inelastic Muon-Proton Scattering
D. Adams
We have measured the spin-dependent structure function in inclusive deep-inelastic scattering of polarized muons off polarized protons, in the kinematic range $0.003 < x <…
Spin Asymmetry in Muon--Proton Deep Inelastic Scattering on a Transversely-Polarized Target
The Spin Muon Collaboration
We measured the spin asymmetry in the scattering of 100 GeV longitudinally-polarized muons on transversely polarized protons. The asymmetry was found to be compatible with zero in…