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CERN Document Server 10 записей найдено  Поиск длился 0.56 секунд. 
1.
New measurements of transverse spin asymmetries at COMPASS / Martin, Anna (Trieste U.) /COMPASS Collaboration
The recent developments in the description of the 3D structure of the nucleon have highlighted the relevance of SIDIS measurements with transversely polarized nucleons. The phenomenological analyses have also highlighted how the scarcity of SIDIS data collected with neutron or deuterium targets limits the knowledge of the parton distribution functions, in particular for the d quark.In the year 2022, the COMPASS experiment at CERN took data using a transversely polarised deuteron target and a 160 GeV muon beam at CERN, to balance the existing proton target data.Detailed studies had shown how those data would lead to significant progress in the knowledge of the transversity distributions.First preliminary results for the Collins and Sivers asymmetries from part of the 2022 data have already been produced, they are in line with expectations and are shown here for the first time..
2024 - 8 p. - Published in : PoS SPIN2023 (2024) 065 Fulltext: PDF;
In : 24th International Spin Symposium, Durham, USA, 24 - 29 Sep 2023, pp.065
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2.
COMPASS results on weighted Sivers asymmetry in SIDIS / Martin, Anna (Trieste U. ; INFN, Trieste) /COMPASS Collaboration
The transverse momentum weighted asymmetries have been proposed since a long time to access the transverse momentum dependent parton distributions. The COMPASS Collaboration has recently measured the weighted Sivers asymmetries in deep inelastic lepton scattering off transversly polarised protons. [...]
SISSA, 2019 - 7 p. - Published in : PoS SPIN2018 (2019) 037 Fulltext: PDF;
In : 23rd International Spin Symposium, Ferrara, Italy, 10 - 14 Sep 2018, pp.037
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3.
Future SIDIS measurements with a transversely polarized deuteron target at COMPASS / Martin, Anna (Trieste U. ; INFN, Trieste) /COMPASS
Since 2005, measurements of Collins and Sivers asymmetries from the HERMES and COMPASS experiments have shown that both the transversity and the Sivers PDFs are different from zero and measurable in semi-inclusive DIS on transversely polarised targets. Most of the data were collected on proton targets, and only small event samples were collected in the early phase of the COMPASS experiment on a deuteron (6LiD) target and more recently at JLab, on 3He. [...]
SISSA, 2019 - 6 p. - Published in : PoS DIS2019 (2019) 267 Fulltext: PDF;
In : The XXVII International Workshop on Deep Inelastic Scattering and Related Subjects, Turin, Italy, 8 - 12 Apr 2019, pp.267
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4.
Extraction of transversity from COMPASS and Belle data / Bradamante, Franco (Trieste U. ; INFN, Trieste) ; Barone, Vincenzo ; Martin, Anna
The valence transversity distributions of the u- and the d-quarks have been extracted point-by-point from single-hadron production and dihadron production data measured in semi-inclusive deep inelastic scattering and in $e^{+}e$ annihilation. The transversity distributions are found to be compatible with each other and with previous analyses..
2016 - 6 p. - Published in : Int. J. Mod. Phys. Conf. Ser. 40 (2016) 1660034
In : 21st International Symposium on Spin Physics, Beijing, China, 20 - 24 Oct 2014, pp.1660034
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5.
Phenomenological Extraction of Transversity from COMPASS SIDIS and Belle $e^{+}e^-$ Data / Bradamante, Franco (Trieste U. ; INFN, Trieste) ; Martin, Anna (Trieste U. ; INFN, Trieste) ; Barone, Vincenco (Trieste U. ; INFN, Trieste)
The valence transversity distributions of the u- and the d-quarks have been extracted point-by-point from single-hadron production and dihadron production data measured in semi-inclusive deep inelastic scattering and in e+e annihilation. The extraction is based on some simple assumptions and does not require any parametrization. [...]
2015 - Published in : Int. J. Mod. Phys.: Conf. Ser. 37 (2015) 1560062
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6.
COMPASS results on Collins and Sivers asymmetries for charged hadrons / Martin, Anna (Trieste U. ; INFN, Trieste) /for the COMPASS collaboration
The study of transverse spin and transverse momentum effects is an important part of the scientific program of COMPASS, a fixed target experiment at the CERN SPS taking data since 2002. The studies are carried on by measuring the hadrons produced in deep inelastic scattering (DIS) of 160 GeV/c muons off different targets. [...]
arXiv:1303.2076.- 2014 - 8 p. - Published in : Phys. Part. Nucl. 45 (2014) 141-145 External link: Preprint
In : The 20th International Symposium on Spin Physics, Dubna, Russia, 17 - 22 Sep 2012, pp.141-145
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7.
Transverse Spin Structure with Muon Beam and Drell-Yan Measurements at COMPASS / Martin, Anna (Trieste U. ; INFN, Trieste)
COMPASS (COmmon Muon and Proton Apparatus for Structure and Spectroscopy) is a fixed target experiment at the CERN SPS taking data since 2002. [...]
2009. - 8 p.
Fulltext
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8.
Transverse Spin Phenomena in Lepton Scattering / Martin, Anna (Trieste U. ; INFN, Trieste)
The transverse spin phenomena are one of the most important topics being presently investigated in semi-inclusive Deep Inelastic Scattering. In the last two years, since SPIN2004, many new data have become available. [...]
2007 - 6 p. - Published in : AIP Conf. Proc.: 915 (2007) , pp. 82-87 External link: Published version from AIP
In : 17th International Spin Physics Symposium, Kyoto, Japan, 2 - 7 Oct 2006, pp.82-87
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9.
COMPASS results on Transverse single-spin asymmetries / Martin, Anna (Trieste U. ; INFN, Trieste) /COMPASS Collaboration
New results on single spin asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarised LiD target are presented. The data were taken in the years 2002, 2003 and 2004 with the COMPASS spectrometer using the muon beam of the CERN SPS at 160 GeV/c. [...]
hep-ex/0702002.- 2006 - 17 p. - Published in : Czechoslov. J. Phys. 56 (2006) F33-F52 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ex/0702002 PDF
In : Advanced Studies Institution Symmetries and Spin, Prague, Czech Republic, 19 - 26 Jul 2006, pp.33-52
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10.
16th International Spin Physics Symposium - Workshop on polarized electron sources and polarimeters SPIN 2004   10 - 16 Oct 2004  - Trieste, Italy  / Aulenbacher, Kurt (ed.); Bradamante, Franco (ed.); Bressan, Andrea (ed.); Martin, Anna (ed.)
London : World Scientific, 2005 - 1012 p.
e-proceedings
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