NFDI4DS | UHH-SEMS - Publication Details

S. Dalla Torre

ORCID: 0000-0002-5552-9732

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A5102811621

Research Areas

Particle Detector Development and Performance
Particle physics theoretical and experimental studies
Radiation Detection and Scintillator Technologies
High-Energy Particle Collisions Research
Quantum Chromodynamics and Particle Interactions
CCD and CMOS Imaging Sensors
Atomic and Subatomic Physics Research
Dark Matter and Cosmic Phenomena
Nuclear Physics and Applications
Calibration and Measurement Techniques
Particle Accelerators and Free-Electron Lasers
Photocathodes and Microchannel Plates
Medical Imaging Techniques and Applications
Muon and positron interactions and applications
Advanced NMR Techniques and Applications
Diamond and Carbon-based Materials Research
Solid-state spectroscopy and crystallography
Inorganic Fluorides and Related Compounds
Neutrino Physics Research
Astronomical Observations and Instrumentation
Superconducting Materials and Applications
Magnetic Field Sensors Techniques
Electron and X-Ray Spectroscopy Techniques
Cold Atom Physics and Bose-Einstein Condensates
Magnetism in coordination complexes

Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2015-2024

University of Aveiro
2017-2023

A. Alikhanyan National Laboratory
2023

University of Trieste
2013-2023

Mississippi State University
2022

University of Turin
2007-2019

Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2015-2019

Bielefeld University
1994-2014

Istituto Nazionale di Fisica Nucleare
2014

High Energy Accelerator Research Organization
2010

Science Requirements and Detector Concepts for the Electron-Ion Collider

OPENALEX - Publications

Rabah Abdul Khalek Alberto Accardi J. Adam Daniel Adamiak W. Akers and 95 more

10.1016/j.nuclphysa.2022.122447 article EN Nuclear Physics A 2022-08-08

The COMPASS experiment at CERN

OPENALEX - Publications

P. Abbon E. Albrecht V. Alexakhin Yu. Alexandrov G. D. Alexeev and 95 more

10.1016/j.nima.2007.03.026 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2007-04-05

Measurement of the spin-dependent structure function g1(x) of the deuteron

OPENALEX - Publications

B. Adeva S. Ahmad A. Arvidson B. Badełek M. Ballintijn and 95 more

10.1016/0370-2693(93)90438-n article EN Physics Letters B 1993-04-01

Measurement of the spin-dependent structure function g1(x) of the proton

OPENALEX - Publications

D. L. Adams B. Adeva E. Arık A. Arvidson B. Badełek and 95 more

10.1016/0370-2693(94)90793-5 article EN Physics Letters B 1994-06-01

First Measurement of the Transverse Spin Asymmetries of the Deuteron in Semi-inclusive Deep Inelastic Scattering

OPENALEX - Publications

V. Alexakhin Yu. Alexandrov G. D. Alexeev A. Amoroso B. Badełek and 95 more

First measurements of the Collins and Sivers asymmetries charged hadrons produced in deep-inelastic scattering muons on a transversely polarized 6-LiD target are presented. The data were taken 2002 with COMPASS spectrometer using muon beam CERN SPS at 160 GeV/c. asymmetry turns out to be compatible zero, as does measured within present statistical errors.

10.1103/physrevlett.94.202002 article EN Physical Review Letters 2005-05-26

Spin asymmetriesA1and structure functionsg1of the proton and the deuteron from polarized high…

OPENALEX - Publications

B. Adeva T. Akdoğan E. Arık A. Arvidson B. Badełek and 95 more

We present the final results of spin asymmetries A1 and structure functions g1 proton deuteron in kinematic range 0.0008<x<0.7 0.2<Q2<100GeV2. For determination A1, addition to usual method which employs inclusive scattering events includes a large radiative background at low x, we use new minimizes by selecting with least one hadron as well muon state. find that this gives smaller errors for x<0.02, so it is combined provide optimal set results.Received 18 May...

10.1103/physrevd.58.112001 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 1998-10-19

The deuteron spin-dependent structure function g1d and its first moment

OPENALEX - Publications

V. Alexakhin Yu. Alexandrov G. D. Alexeev M. Alexeev A. Amoroso and 95 more

10.1016/j.physletb.2006.12.076 article EN Physics Letters B 2007-02-05

Spin structure of the proton from polarized inclusive deep-inelastic muon-proton scattering

OPENALEX - Publications

D. L. Adams B. Adeva E. Arık A. Arvidson B. Badełek and 95 more

We have measured the spin-dependent structure function g1p in inclusive deep-inelastic scattering of polarized muons off protons, kinematic range 0.003<x<0.7 and 1GeV2<Q2<60GeV2. A next-to-leading order QCD analysis is used to evolve g1p(x,Q2) a fixed Q02. The first moment at Q02=10GeV2 Γ1p=0.136±0.013 (stat) ±0.009 (syst) ±0.005 (evol). This result below prediction Ellis-Jaffe sum rule by more than two standard deviations. singlet axial charge a0 found be 0.28±0.16. In Adler-Bardeen...

10.1103/physrevd.56.5330 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 1997-11-01

Collins and Sivers asymmetries for pions and kaons in muon–deuteron DIS

OPENALEX - Publications

M. Alekseev V. Alexakhin Yu. Alexandrov G. D. Alexeev A. Amoroso and 95 more

10.1016/j.physletb.2009.01.060 article EN Physics Letters B 2009-01-31

A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target

OPENALEX - Publications

E.S. Ageev V. Alexakhin Yu. Alexandrov G. D. Alexeev M. Alexeev and 95 more

10.1016/j.nuclphysb.2006.10.027 article EN Nuclear Physics B 2006-11-16

The spin-dependent structure function of the proton g1p and a test of the Bjorken sum rule

OPENALEX - Publications

M. Alekseev V. Alexakhin Yu. Alexandrov G.D. Alexeev A. Amoroso and 95 more

10.1016/j.physletb.2010.05.069 article EN Physics Letters B 2010-06-02

Measurement of the Collins and Sivers asymmetries on transversely polarised protons

OPENALEX - Publications

M. Alekseev V.Yu. Alexakhin Yu. Alexandrov G.D. Alexeev A. Amoroso and 95 more

10.1016/j.physletb.2010.08.001 article EN Physics Letters B 2010-08-05

First Measurement of Transverse-Spin-Dependent Azimuthal Asymmetries in the Drell-Yan Process

OPENALEX - Publications

M. Aghasyan R. Akhunzyanov G.D. Alexeev M.G Alexeev A. Amoroso and 95 more

The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use CERN SPS 190 GeV/c π^{-} beam and a transversely polarized ammonia target. Three giving access to different transverse-momentum-dependent (TMD) parton distribution functions (PDFs) are extracted using dimuon events with invariant mass between 4.3 GeV/c^{2} 8.5 GeV/c^{2}. Within experimental uncertainties, observed sign Sivers asymmetry found be consistent...

10.1103/physrevlett.119.112002 article EN cc-by Physical Review Letters 2017-09-12

The spin structure functiong1pof the proton and a test of the Bjorken sum rule

OPENALEX - Publications

C. Adolph R. Akhunzyanov M. Alexeev G.D. Alexeev A. Amoroso and 95 more

New results for the double spin asymmetry A1p and proton longitudinal structure function g1p are presented. They were obtained by COMPASS Collaboration using polarised 200 GeV muons scattered off a longitudinally NH3 target. The data collected in 2011 complement those recorded 2007 at 160 GeV, particular lower values of x. improve statistical precision g1p(x) about factor two region x≲0.02. A next-to-leading order QCD fit to g1 world is performed. It leads new determination quark...

10.1016/j.physletb.2015.11.064 article EN cc-by Physics Letters B 2015-11-27

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

OPENALEX - Publications

C. Adolph R. Akhunzyanov M. Alexeev G. D. Alexeev A. Amoroso and 95 more

Measurements of the Collins and Sivers asymmetries for charged pions neutral kaons produced in semi-inclusive deep-inelastic scattering high energy muons off transversely polarised protons are presented. The results were obtained using all available COMPASS proton data, which taken years 2007 2010. exhibit valence region a non-zero signal there hints also kaons. found to be positive compatible with zero otherwise.

10.1016/j.physletb.2015.03.056 article EN cc-by Physics Letters B 2015-04-05

A new measurement of the spin-dependent structure function g1(x) of the deuteron

OPENALEX - Publications

D. L. Adams B. Adeva E. Arık A. Arvidson B. Badełek and 95 more

We present a new measurement of the spin-dependent structure function g1d deuteron in deep inelastic scattering 190 GeV polarised muons on deuterons, kinematic range 0.003 < x 0.7 and 1 GeV2 Q2 60 GeV2. This is found to be negative at small x. The first moment Γ1d=∫01g1ddx evaluated Q02 = 10 0.034 ± 0.009 (stat.) 0.006 (syst.). value below Ellis-Jaffe sum rule prediction by three standard deviations. Using our earlier determination Γ1p, we obtain Γ1p − Γ1n 0.199 0.038 which agrees with Bjorken rule.

10.1016/0370-2693(95)00898-u article EN cc-by-nc-nd Physics Letters B 1995-08-01

Polarised quark distributions in the nucleon from semi-inclusive spin asymmetries

OPENALEX - Publications

B. Adeva T. Akdoğan E. Arık A. Arvidson B. Badełek and 95 more

We present a measurement of semi-inclusive spin asymmetries for positively and negatively charged hadrons from deep inelastic scattering polarised muons on protons deuterons in the range 0.003<x<0.7 Q2>1 GeV2. Compared to our previous publication this subject, with new data statistical errors have been reduced by nearly factor two. From these inclusive we determine quark distributions valence quarks non-strange sea at Q2=10 The u distribution, Δuv(x), is positive polarisation increases x. d...

10.1016/s0370-2693(97)01546-3 article EN cc-by-nc-nd Physics Letters B 1998-02-01

Measurement of the spin structure of the deuteron in the DIS region

OPENALEX - Publications

E.S. Ageev V. Alexakhin Yu. Alexandrov G. D. Alexeev A. Amoroso and 95 more

10.1016/j.physletb.2005.03.025 article EN Physics Letters B 2005-03-23

The COMPASS setup for physics with hadron beams

OPENALEX - Publications

P. Abbon C. Adolph R. Akhunzyanov Yu. Alexandrov M. Alexeev and 95 more

The main characteristics of the COMPASS experimental setup for physics with hadron beams are described. This was designed to perform exclusive measurements processes several charged and/or neutral particles in final state. Making use a large part apparatus that previously built spin structure studies muon beam, it also features new target system as well or upgraded detectors. is able operate at high incident flux available CERN. It characterised by angular and momentum coverages, nearly flat...

10.1016/j.nima.2015.01.035 article EN cc-by Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2015-01-19

Odd and even partial waves ofηπ−andη′π<mml:…

OPENALEX - Publications

C. Adolph R. Akhunzyanov M. Alexeev G. D. Alexeev A. Amoroso and 95 more

Exclusive production of $\eta\pi^-$ and $\eta'\pi^-$ has been studied with a $191\,\textrm{GeV}/c$ $\pi^-$ beam impinging on hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum ($L$) characteristics in the inspected invariant mass range up to $3\,\textrm{GeV}/c^2$. A striking similarity between two systems is observed for $L=2,4,6$ intensities (scaled by kinematical factors) relative phases. The known resonances $a_2(1320)$ $a_4(2040)$ are line...

10.1016/j.physletb.2014.11.058 article EN cc-by Physics Letters B 2014-12-03

Transverse-momentum-dependent multiplicities of charged hadrons in muon-deuteron deep inelastic scattering

OPENALEX - Publications

M. Aghasyan M. Alexeev G.D. Alexeev A. Amoroso V. Andrieux and 95 more

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 Collaboration at CERN. The following kinematic domain is covered data: photon virtuality ${Q}^{2}>1\text{ }\text{ }(\mathrm{GeV}/c{)}^{2}$, invariant mass hadronic system $W>5\text{ }\mathrm{GeV}/{c}^{2}$, Bjorken scaling variable range $0.003<x<0.4$, fraction virtual energy carried $0.2<z<0.8$, and square transverse...

10.1103/physrevd.97.032006 article EN cc-by Physical review. D/Physical review. D. 2018-02-07

Next-to-leading order QCD analysis of the spin structure functiong1

OPENALEX - Publications

B. Adeva T. Akdoğan E. Arık B. Badełek G. Bardin and 95 more

We present a next-to-leading order QCD analysis of the presently available data on spin structure function g1 including final from Spin Muon Collaboration. results for first moments proton, deuteron, and neutron functions, determine singlet nonsinglet parton distributions in two factorization schemes. also test Bjorken sum rule find agreement with theoretical prediction at level 10%.Received 18 May 1998DOI:https://doi.org/10.1103/PhysRevD.58.112002©1998 American Physical Society

10.1103/physrevd.58.112002 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 1998-10-19

Spin asymmetries for events with highpThadrons in DIS and an evaluation of the gluon polarization

OPENALEX - Publications

B. Adeva E. Arık A. Arvidson B. Badełek G. Baum and 95 more

We present a measurement of the longitudinal spin cross section asymmetry for deep-inelastic muon-nucleon interactions with two high transverse momentum hadrons in final state. Two methods event classification are used to increase contribution photon-gluon fusion process above 30%. The most effective one, based on neural network approach, provides asymmetries Al→NlhhXp=0.030±0.057(stat)±0.010(syst) and Al→NlhhXd=0.070±0.076(stat)±0.010(syst). From these values we derive an averaged gluon...

10.1103/physrevd.70.012002 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2004-07-23

The spin-dependent structure function g1(x) of the deuteron from polarized deep-inelastic muon scattering

OPENALEX - Publications

D. L. Adams B. Adeva T. Akdoğan E. Arık A. Arvidson and 95 more

We present a new measurement of the spin-dependent structure function g1d deuteron from deep inelastic scattering 190 GeV polarized muons on deuterons. The results are combined with our previous measurements g1d. A perturbative QCD evolution in next-to-leading order is used to compute g1d(x) at constant Q2. At Q2 = 10 GeV2, we obtain first moment Γ1d=∫1dg1ddx=0.041±0.008, flavour-singlet axial charge nucleon a0 0.30 ± 0.08, and an strange quark as −0.09 0.03. Using earlier determination Γ1p,...

10.1016/s0370-2693(97)00159-7 article EN cc-by-nc-nd Physics Letters B 1997-03-01

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