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CERN Document Server 28 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 1.70 secondes. 
1.
Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering / 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 6LiD (deuteron) and NH3 (proton) targets is presented. All available data collected in the years 2002–2004 and 2007/2010 with the COMPASS spectrometer using a muon beam of 160 GeV=c at the CERN SPS were analysed. [...]
arXiv:2301.02013; CERN-EP-2022-292.- Geneva : CERN, 2023-08-29 - 11 p. - Published in : Phys. Lett. B 845 (2023) 138155 Draft (restricted): PDF; Fulltext: 2301.02013 - PDF; CERN-EP-2022-292 - PDF; Publication - PDF;
Notice détaillée
2.
Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of $\rho^0$ mesons / COMPASS Collaboration
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 phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced $\rho^0$ mesons. [...]
arXiv:2211.00093; CERN-EP-2022-234; CERN-EP-2022--234.- Geneva : CERN, 2023-06-16 - 9 p. - Published in : Phys. Lett. B 843 (2023) 137950 Draft (restricted): PDF; Fulltext: CERN-EP-2022-234_2 - PDF; 2211.00093 - PDF; Publication - PDF;
Notice détaillée
3.
Measurement of $P_T$-weighted Sivers asymmetries in leptoproduction of hadrons / COMPASS Collaboration
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 important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. [...]
arXiv:1809.02936; CERN-EP-2018-242.- Geneva : CERN, 2019-03 - 20 p. - Published in : Nucl. Phys. B 940 (2019) 34-53 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2018-242 - PDF; 1809.02936 - PDF;
Notice détaillée
4.
Interplay among transversity induced asymmetries in hadron leptoproduction / COMPASS Collaboration
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 exhibits an azimuthal modulation known as Collins effect. [...]
arXiv:1507.07593; CERN-PH-EP-2015-199; CERN-PH-EP-2015-199.- Geneva : CERN, 2016-02-10 - 6 p. - Published in : Phys. Lett. B 753 (2016) 406-411 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint
Notice détaillée
5.
The COMPASS Setup for Physics with Hadron Beams / COMPASS Collaboration
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 several charged and/or neutral particles in the final state. [...]
arXiv:1410.1797; CERN-PH-EP-2014-247; CERN-PH-EP-2014-247.- Geneva : CERN, 2015-04-11 - 47 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 779 (2015) 69-115 Draft (restricted): PDF; Elsevier Open Access article: PDF; Fulltext: CERN-PH-EP-2014-247 - PDF; arXiv:1410.1797 - PDF; External link: Preprint
Notice détaillée
6.
Collins and Sivers asymmetries in muonproduction of pions and kaons off transversely polarised proton / COMPASS collaboration
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 transversely polarised protons are presented. The results were obtained using all the available COMPASS proton data, which were taken in the years 2007 and 2010. [...]
arXiv:1408.4405; CERN-PH-EP-2014-213; CERN-PH-EP-2014-213.- Geneva : CERN, 2015-03-31 - 10 p. - Published in : Phys. Lett. B 744 (2015) 250-259 Article from SCOAP3: PDF; Draft (restricted): PDF; Elsevier Open Access article: PDF; Fulltext: CERN-PH-EP-2014-213 - PDF; arXiv:1408.4405 - PDF; External link: Preprint
Notice détaillée
7.
Odd and Even Partial Waves of $\eta\pi^-$ and $\eta'\pi^-$ in $\pi^-p\to\eta^{(\prime)}\pi^-p$ at $191\,\textrm{GeV}/c$ / COMPASS Collaboration
Exclusive production of $\eta\pi^-$ and $\eta'\pi^-$ has been studied with a $191\,\textrm{GeV}/c$ $\pi^-$ beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum ($L$) characteristics in the inspected invariant mass range up to $3\,\textrm{GeV}/c^2$. [...]
arXiv:1408.4286; CERN-PH-EP-2014-204; CERN-PH-EP-2014-204.- Geneva : CERN, 2014-11-30 - 9 p. Article from SCOAP3: PDF; Draft (restricted): PDF; Elsevier Open Access article: PDF; Fulltext: CERN-PH-EP-2014-204 - PDF; arXiv:1408.4286 - PDF; S0370269314008685 - XML;
Notice détaillée
8.
Search for exclusive photoproduction of Z$_c^{\pm}$(3900) at COMPASS / COMPASS Collaboration
A search for the exclusive production of the $Z_c^{\pm}(3900)$ hadron by virtual photons has been performed in the channel $Z_c^{\pm}(3900)\rightarrow J/\psi \pi^{\pm}$. The data cover the range from 7~GeV to 19~GeV in the centre-of-mass energy of the photon-nucleon system. [...]
arXiv:1407.6186; CERN-PH-EP-2014-180; CERN-PH-EP-2014-180.- Geneva : CERN, 2015-03-06 - 5 p. - Published in : Phys. Lett. B 742 (2015) 330-334 Article from SCOAP3: PDF; Draft (restricted): PDF; Elsevier Open Access article: PDF; Fulltext: CERN-PH-EP-2014-180 - PDF; arXiv:1407.6186 - PDF; External link: Preprint
Notice détaillée
9.
Measurement of the Charged-Pion Polarizability / COMPASS Collaboration
The COMPASS collaboration at CERN has investigated pion Compton scattering, $\pi^-\gamma\rightarrow \pi^-\gamma$, at centre-of-mass energy below 3.5 pion masses. The process is embedded in the reaction $\pi^-\mathrm{Ni}\rightarrow\pi^-\gamma\;\mathrm{Ni}$, which is initiated by 190 GeV pions impinging on a nickel target. [...]
arXiv:1405.6377; CERN-PH-EP-2014-109; CERN-PH-EP-2014-109.- Geneva : CERN, 2015-02-10 - 6 p. - Published in : Phys. Rev. Lett. 114 (2015) 062002 APS Open Access article: PDF; Draft (restricted): PDF; Fulltext: arXiv:1405.6377 - PDF; CERN-PH-EP-2014-109 - PDF; External link: Interactions.org article
Notice détaillée
10.
Spin alignment and violation of the OZI rule in exclusive $\omega$ and $\phi$ production in pp collisions / COMPASS collaboration
Exclusive production of the isoscalar vector mesons $\omega$ and $\phi$ is measured with a 190 GeV$/c$ proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable $x_{F}$ of the fast proton. [...]
arXiv:1405.6376; CERN-PH-EP-2014-096; CERN-PH-EP-2014-096.- Geneva : CERN, 2014-09 - 24 p. - Published in : Nucl. Phys. B 886 (2014) 1078-1101 Article from SCOAP3: PDF; Draft (restricted): PDF; Elsevier Open Access article: PDF; Fulltext: arXiv:1405.6376 - PDF; CERN-PH-EP-2014-096 - PDF; S0550321314002399 - XML;
Notice détaillée

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22 Elia, C
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