K. Augsten

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…

Combination of the top-quark mass measurements from the Tevatron collider

The CDF, D0 collaborations, T. Aaltonen +858

The top quark is the heaviest known elementary particle, with a mass about 40 times larger than the mass of its isospin partner, the bottom quark. It decays almost 100% of the time…

hep-ex2021

Spin Density Matrix Elements in Exclusive $I ¨ $ Meson Muoproduction $^{*}$

M. G. Alexeev, G. D. Alexeev, A. Amoroso +197

We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $I ¨ $ meson muoproduction on the proton at COMPASS using 160 GeV/ $c$ polarised $I^¼^{+}$ and $ Î…

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…

Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of $I ¨ ^{0}$ 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…

Measurement of the cross section for hard exclusive $I ¨ ^{0}$ leptoproduction

M. G. Alexeev, G. D. Alexeev, A. Amoroso +199

We report on a measurement of hard exclusive $I ¨ ^{0}$ muoproduction on the proton by COMPASS using 160 GeV/ $c$ polarised $I^¼^{+}$ and $I^¼^{-}$ beams of the CERN SPS impinging on a liquid…

hep-ex2026

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 $I^\cdot I ¨ ^{-}$ and $I^\cdot^{'} I ¨ ^{-}$ pairs in the reactions $I ¨ ^{-} p \to I^\cdot^{(')} I ¨ ^{-} p$ . For the…

physics.ins-det2022

ATHENA Detector Proposal -- A Totally Hermetic Electron Nucleus Apparatus proposed for IP6 at the Electron-Ion Collider

ATHENA Collaboration, J. Adam, L. Adamczyk +433

ATHENA has been designed as a general purpose detector capable of delivering the full scientific scope of the Electron-Ion Collider. Careful technology choices provide fine trackin…

Search for pair production of the scalar top quark in muon+tau final states

D0 Collaboration, V. M. Abazov, B. Abbott +407

We present a search for the pair production of scalar top quarks ( $t ~_{1}$ ), the lightest supersymmetric partners of the top quarks, in $p p ˉ$ collisions at a center-of-…

hep-ex2022

Double $J / I ¨ $ 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 $J / I ¨ $ mesons using COMPASS data collected with a 190 GeV/ $c$ $I ¨ ^{-}$ beam scattering off NH $_{3}$ , Al and W targets. Kinematic dist…

Measurement of $P_{T}$ -weighted Sivers asymmetries in leptoproduction of hadrons

M. G. Alexeev, G. D. Alexeev, A. Amoroso +209

The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum $P_{T}$ , allow for the extraction of importan…

hep-ex2009

Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics

The ATLAS Collaboration, G. Aad, E. Abat +2604

A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together w…

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/ $c$ , $I ¨ ^{-}$ beam and…

hep-ex2024

Measurement of the hard exclusive $I ¨ ^{0}$ 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…

Spin Density Matrix Elements in Exclusive $I ¨ ^{0}$ 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 $I ¨ ^{0}$ meson muoproduction at COMPASS using 160~GeV/ $c$ polarised $I^¼^{+}$ and $I^¼^{-}$ beams…

hep-ex2022

The exotic meson $I ¨ _{1} (1600)$ with $J^{P C} = 1^{-+}$ and its decay into $I ¨ (770) I ¨ $

M. G. Alexeev, G. D. Alexeev, A. Amoroso +192

We study the spin-exotic $J^{P C} = 1^{-+}$ amplitude in single-diffractive dissociation of 190 GeV $/ c$ pions into $I ¨ ^{-} I ¨ ^{-} I ¨ ^{+}$ using a hydrogen target and confirm the $Ï_1(1600)…

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…

Measurement of the neutrino mixing angle $I^¸_{23}$ in NOvA

The NOvA Collaboration, P. Adamson, L. Aliaga +177

This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of $6.05 \times 1 0^{20}$ protons-on-target from the NuMI beam a…

Letter of Intent: A New QCD facility at the M2 beam line of the CERN SPS (COMPASS++/AMBER)

B. Adams, C. A. Aidala, R. Akhunzyanov +263

A New QCD facility at the M2 beam line of the CERN SPS COMPASS++/AMBER

hep-ex2013

Combination of CDF and D0 W-Boson Mass Measurements

CDF Collaboration, T. Aaltonen, S. Amerio +771

We summarize and combine direct measurements of the mass of the $W$ boson in $s = 1.96 TeV$ proton-antiproton collision data collected by CDF and D0 experiments at th…

hep-ex2025

Spectroscopy of Strange Mesons and First Observation of a Strange Crypto-Exotic State with $J^{P} = 0^{-}$

G. D. Alexeev, M. G. Alexeev, C. Alice +160

We measured the strange-meson spectrum in the scattering reaction $K^{-} + p \to K^{-} I ¨ ^{-} I ¨ ^{-} + p$ with the COMPASS spectrometer at CERN. Using the world's largest sample…

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 $I ¨ ^{-}$ beam impinging on a transversely polarised ammonia target. Com…

Search for active-sterile neutrino mixing using neutral-current interactions in NOvA

NOvA Collaboration, P. Adamson, L. Aliaga +177

We report results from the first search for sterile neutrinos mixing with active neutrinos through a reduction in the rate of neutral-current interactions over a baseline of 810\,k…

Constraints on Oscillation Parameters from $I^½_{e}$ Appearance and $I^½_{I^} ¼$ Disappearance in NOvA

The NOvA Collaboration, P. Adamson, L. Aliaga +177

Results are reported from an improved measurement of $I^½_{I^} ¼ \to I^½_{e}$ transitions by the NOvA experiment. Using an exposure equivalent to $6.05 \times 1 0^{20}$ protons-on-targ…

hep-ex2024

Multiplicities of positive and negative pions, kaons and unidentified hadrons from deep-inelastic scattering of muons off a liquid hydrogen target

G. D. Alexeev, M. G. Alexeev, C. Alice +166

The multiplicities of positive and negative pions, kaons and unidentified hadrons produced in deep-inelastic scattering are measured in bins of the Bjorken scaling variable $x$ , th…

hep-ex2021

Comparison of $pp$ and $p p ˉ$ differential elastic cross sections and observation of the exchange of a colorless $C$ -odd gluonic compound

V. M. Abazov, B. Abbott, B. S. Acharya +473

We describe an analysis comparing the $p p ˉ$ elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96 TeV to that in $pp$ collisions as meas…

hep-ex2020

Report on the ECFA Early-Career Researchers Debate on the 2020 European Strategy Update for Particle Physics

N. Andari, L. ApolinÃ¡rio, K. Augsten +118

A group of Early-Career Researchers (ECRs) has been given a mandate from the European Committee for Future Accelerators (ECFA) to debate the topics of the current European Strategy…

hep-ex2016

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

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-ph2021

Triangle Singularity as the Origin of the $a_{1} (1420)$

G. D. Alexeev, M. G. Alexeev, A. Amoroso +194

The COMPASS experiment recently discovered a new isovector resonance-like signal with axial-vector quantum numbers, the $a_{1} (1420)$ , decaying to $f_{0} (980) I ¨ $ . With a mass too close…

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 $I^¼^{+} N \to I^¼^{+} (J / I ¨ I ¨ ^{+} I ¨ ^{-}) I ¨ ^{\pm} N^{'}$ using COMPASS data collected with incoming muo…

hep-ph2017

New analysis of $I^\cdot I ¨ $ tensor resonances measured at the COMPASS experiment

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

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

Measurement of the differential cross section dÏ/dt in elastic $p p ˉ$ scattering at sqrt(s)=1.96 TeV

D0 Collaboration, V. M. Abazov, B. Abbott +406

We present a measurement of the elastic differential cross section $d I ¨ (p p ˉ \to p p ˉ) / d t$ as a function of the four-momentum-transfer squared t. The data sample cor…

hep-ex2020

Antiproton over proton and K $^{-}$ over K $^{+}$ multiplicity ratios at high $z$ in DIS

M. G. Alexeev, G. D. Alexeev, A. Amoroso +195

The $p ˉ$ over p multiplicity ratio is measured in deep-inelastic scattering for the first time using (anti-) protons carrying a large fraction of the virtual-photon energ…

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

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

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

Contribution of exclusive diffractive processes to the measured azimuthal asymmetries in SIDIS

J. Agarwala, M. G. Alexeev, G. D. Alexeev +203

Hadron leptoproduction in Semi-Inclusive measurements of Deep-Inelastic Scattering (SIDIS) on unpolarised nucleons allows one to get information on the intrinsic transverse momentu…

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 $I^¼^{+}$ and $I^¼^{-}$ beams of the CERN SPS impinging o…

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…

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-ex2025

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…

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-ex2021

Probing transversity by measuring $I^$ 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…

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…