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CERN Document Server 找到 763 笔记录  1 - 10下一个最後  跳到记录: 检索需时 0.54 秒. 
1.
Dark-Sector Search via Pion-Produced η and η′ Mesons Decaying Invisibly in the NA64h Detector / NA64 Collaboration
We present the first results from a proof-of-concept search for dark sectors via invisible decays of pseudoscalar η and η′ mesons in the NA64h experiment at the CERN SPS. Our novel technique uses the charge-exchange reaction of 50 GeV π- on nuclei of an active target as the source of neutral mesons. [...]
2024 - 6 p. - Published in : Phys. Rev. Lett. 133 (2024) 121803 Fulltext: PDF;
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2.
First constraints on the L$_{μ}$− L$_{τ}$ explanation of the muon g-2 anomaly from NA64-e at CERN / NA64 Collaboration
The inclusion of an additional $U(1)$ gauge $L_\mu-L_\tau$ symmetry would release the tension between the measured and the predicted value of the anomalous muon magnetic moment: this paradigm assumes the existence of a new, light $Z^\prime$ vector boson, with dominant coupling to $\mu$ and $\tau$ leptons and interacting with electrons via a loop mechanism. The $L_\mu-L_\tau$ model can also explain the Dark Matter relic abundance, by assuming that the $Z^\prime$ boson acts as a ``portal'' to a new Dark Sector of particles in Nature, not charged under known interactions. [...]
arXiv:2404.06982; CERN-EP-2024-103.- Geneva : CERN, 2024-07-23 - 15 p. - Published in : JHEP 2407 (2024) 212 Draft (restricted): PDF; Fulltext: CERN-EP-2024-103 - PDF; document - PDF; NA64-PAPER-24-02 - PDF; 2404.06982 - PDF;
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3.
Probing light dark matter with positron beams at NA64 / NA64 Collaboration
We present the results of a missing-energy search for Light Dark Matter which has a new interaction with ordinary matter transmitted by a vector boson, called dark photon ($A^\prime$). For the first time, this search is performed with a positron beam by using the significantly enhanced production of $A^\prime$ in the resonant annihilation of positrons with atomic electrons of the target nuclei, followed by the invisible decay of $A^\prime$ into dark matter. [...]
arXiv:2308.15612; CERN-EP-2023-192.- Geneva : CERN, 2024-02-01 - 6 p. - Published in : Phys. Rev. D 109 (2024) L031103 Draft (restricted): PDF; Fulltext: CERN-EP-2023-192 - PDF; 2308.15612 - PDF; Publication - PDF;
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4.
Charged-current quasielastic (anti)neutrino cross sections on $^{12}$C with realistic spectral functions including meson-exchange contributions / M V Ivanov (Sofiya, Inst. Nucl. Res.) ; Antonov, A N (Sofiya, Inst. Nucl. Res.) ; Megias, G D (Seville U.) ; Caballero, J A (Seville U.) ; Barbaro, M B (INFN, Turin ; Turin U.) ; Amaro, J E (Granada U.) ; Simo, I Ruiz (Granada U.) ; Donnelly, T W (MIT, Cambridge, Dept. Phys. ; MIT, LNS) ; Udías, J M (Madrid U.)
We present a detailed study of charged-current quasielastic (anti)neutrino scattering cross sections on a $^{12}$C target obtained using a spectral function S (p, E) that gives a scaling function in accordance with the electron scattering data. The spectral function accounts for the nucleon-nucleon (NN) correlations, it has a realistic energy dependence and natural orbitals (NO’s) from the Jastrow correlation method are used in its construction. [...]
2019 - Published in : AIP Conf. Proc.: 2075 (2019) , no. 1, pp. 070004
- Published in : , pp. 227-232 Fulltext: PDF;
In : 10th International Physics Conference of the Balkan Physical Union, Sofia, Bulgaria, 26 - 30 Aug 2018, pp.070004
15th International Conference on Nuclear Reaction Mechanisms, Varenna, Italy, 11 - 15 Jun 2018, pp.227-232
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5.
Measurement of dijet azimuthal decorrelations in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector and determination of the strong coupling / ATLAS Collaboration
A measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations is presented, using the quantity $R_{\Delta \phi}$. The quantity $R_{\Delta \phi}$ specifies the fraction of the inclusive dijet events in which the azimuthal opening angle of the two jets with the highest transverse momenta is less than a given value of the parameter $\Delta \phi_\mathrm{max}$. [...]
arXiv:1805.04691; CERN-EP-2017-282.- Geneva : CERN, 2018-11-07 - 31 p. - Published in : Phys. Rev. D 98 (2018) 092004 Article from SCOAP3: PDF; Fulltext: 1805.04691 - PDF; rdphi_lxplus - PDF; External link: Previous draft version
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6.
Angular analysis of $B^0_d \to K^{*}\mu^+\mu^-$ decays in $pp$ collisions at $\sqrt{s}= 8$ TeV with the ATLAS detector / ATLAS Collaboration
An angular analysis of the decay $B^0_d \rightarrow K^{*}\mu^+\mu^-$ is presented, based on proton-proton collision data recorded by the ATLAS experiment at the LHC. The study is using 20.3 fb$^{-1}$ of integrated luminosity collected during 2012 at centre-of-mass energy of $\sqrt{s}=8$ TeV. [...]
arXiv:1805.04000; CERN-EP-2017-161.- Geneva : CERN, 2018-10-08 - 47 p. - Published in : JHEP 10 (2018) 047 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; External link: Previous draft version
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7.
Measurement of colour flow using jet-pull observables in $t\bar{t}$ events with the ATLAS experiment at $\sqrt{s} = 13$ TeV / ATLAS Collaboration
Previous phenomenological studies and measurements have shown that weighted angular moments derived from jet constituents encode the colour connections between initiating partons that seed the jets. This paper presents measurements of two such distributions, the jet-pull angle and jet-pull magnitude, both of which are derived from the jet-pull angular moment. [...]
arXiv:1805.02935; CERN-EP-2018-041.- Geneva : CERN, 2018-10-22 - 45 p. - Published in : Eur. Phys. J. C 78 (2018) 847 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: 1805.02935 - PDF; 10.1140_epjc_s10052-018-6290-2 - PDF; External link: Previous draft version
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8.
Search for R-parity-violating supersymmetric particles in multi-jet final states produced in $p$-$p$ collisions at $\sqrt{s} =13$ TeV using the ATLAS detector at the LHC / ATLAS Collaboration
Results of a search for gluino pair production with subsequent R-parity-violating decays to quarks are presented. This search uses 36.1 fb$^{-1}$ of data collected by the ATLAS detector in proton-proton collisions with a center-of-mass energy of $\sqrt{s} = 13$ TeV at the LHC. [...]
arXiv:1804.03568; CERN-EP-2017-298.- Geneva : CERN, 2018-10-10 - 38 p. - Published in : Phys. Lett. B 785 (2018) 136 Article from SCOAP3: PDF; Fulltext: PDF; External link: Rivet analyses reference
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9.
Search for supersymmetry in events with four or more leptons in $\sqrt{s}=13$ TeV $pp$ collisions with ATLAS / ATLAS Collaboration
Results from a search for supersymmetry in events with four or more charged leptons (electrons, muons and taus) are presented. The analysis uses a data sample corresponding to 36.1 fb$^{-1}$ of proton-proton collisions delivered by the Large Hadron Collider at $\sqrt{s}=13$ TeV and recorded by the ATLAS detector. [...]
arXiv:1804.03602; CERN-EP-2017-300.- Geneva : CERN, 2018-08-16 - 47 p. - Published in : Phys. Rev. D 98 (2018) 032009 Article from SCOAP3: PDF; Fulltext: PDF; Preprint: PDF; External link: Article from SCOAP3
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10.
Search for Higgs boson decays into pairs of light (pseudo)scalar particles in the $\gamma\gamma jj$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
This Letter presents a search for exotic decays of the Higgs boson to a pair of new (pseudo)scalar particles, $H\to aa$, where the $a$ particle has a mass in the range 20-60 GeV, and where one of the $a$ bosons decays into a pair of photons and the other to a pair of gluons. The search is performed in event samples enhanced in vector-boson fusion Higgs boson production by requiring two jets with large invariant mass in addition to the Higgs boson candidate decay products. [...]
arXiv:1803.11145; CERN-EP-2017-295.- Geneva : CERN, 2018-06-14 - 18 p. - Published in : Phys. Lett. B 782 (2018) 750-767 Article from SCOAP3: PDF; Fulltext: PDF; External link: Previous draft version
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CERN Document Server : 找到 763 笔记录   1 - 10下一个最後  跳到记录:
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