CERN Accelerating science

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Letzte Einträge:
2019-12-12
05:08
Supersymmetric Proton Decay Revisited / Ellis, John ; Evans, Jason L. ; Nagata, Natsumi ; Olive, Keith A. ; Velasco-Sevilla, Liliana
Encouraged by the advent of a new generation of underground detectors---JUNO, DUNE and Hyper-Kamiokande---that are projected to improve significantly on the present sensitivities to various baryon decay modes, we revisit baryon decay in the minimal supersymmetric SU(5) GUT. [...]
arXiv:1912.04888 ; KCL-PH-TH/2019-91 ; CERN-TH-2019-216 ; UT-19-30 ; UMN-TH-3907/19, FTPI-MINN-19/28.
- 53 p.
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2019-12-12
05:08
AION: An Atom Interferometer Observatory and Network / Badurina, L. (King's Coll. London) ; Bentine, E. (U. Oxford (main)) ; Blas, D. (King's Coll. London) ; Bongs, K. (Birmingham U., UK) ; Bortoletto, D. (U. Oxford (main)) ; Bowcock, T. (U. Liverpool (main)) ; Bridges, K. (U. Liverpool (main)) ; Bowden, W. (Teddington, Natl. Phys. Lab ; Imperial Coll., London) ; Buchmueller, O. (Imperial Coll., London) ; Burrage, C. (U. Nottingham) et al.
We outline the experimental concept and key scientific capabilities of AION (Atom Interferometer Observatory and Network), a proposed UK-based experimental programme using cold strontium atoms to search for ultra-light dark matter, to explore gravitational waves in the mid-frequency range between the peak sensitivities of the LISA and LIGO/Virgo/ KAGRA/INDIGO/Einstein Telescope/Cosmic Explorer experiments, and to probe other frontiers in fundamental physics. [...]
arXiv:1911.11755 ; AION-2019-001.
- 28 p.
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2019-12-11
10:08
Search for a narrow resonance lighter than 200 GeV decaying to a pair of muons in proton-proton collisions at $\sqrt{s} = $ 13 TeV / CMS Collaboration
A search is presented for a narrow resonance decaying to a pair of oppositely charged muons using $\sqrt{s} = $ 13 TeV proton-proton collision data recorded at the LHC. [...]
arXiv:1912.04776 ; CMS-EXO-19-018 ; CERN-EP-2019-265 ; CMS-EXO-19-018-003.
- 2019.
Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext

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2019-12-11
08:32
Searches for additional Higgs bosons at CMS / Tao, Junquan (Beijing, Inst. High Energy Phys.) /CMS Collaboration
Direct searches for additional Higgs bosons at CMS are presented. The searches for heavy neutral Higgs bosons, charged Higgs bosons and light neutral Higgs bosons are performed using proton-proton collision data at $\sqrt{s}=13$ TeV collected by the CMS detector. [...]
CMS-CR-2019-122.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF;
In : XXIX International Symposium on Lepton Photon Interactions at High Energies, Toronto, Canada, 5 - 10 Aug 2019

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2019-12-11
04:46
Probing the scale of grand unification with gravitational waves / Buchmuller, Wilfried ; Domcke, Valerie ; Murayama, Hitoshi ; Schmitz, Kai
The spontaneous breaking of $U(1)_{B-L}$ around the scale of grand unification can simultaneously account for hybrid inflation, leptogenesis, and neutralino dark matter, thus resolving three major puzzles of particle physics and cosmology in a single predictive framework. [...]
arXiv:1912.03695 ; CERN-TH-2019-215 ; DESY 19-210 ; IPMU 19-0179.
- 6 p.
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2019-12-11
04:46
Timing Performance of a Micro-Channel-Plate Photomultiplier Tube / Bortfeldt, J. (CERN) ; Brunbauer, F. (CERN) ; David, C. (CERN) ; Desforge, D. (IRFU, Saclay) ; Fanourakis, G. (Democritos Nucl. Res. Ctr.) ; Gallinaro, M. (LIP, Lisbon) ; Garcıa, F. (Helsinki U.) ; Giomataris, I. (IRFU, Saclay) ; Gustavsson, T. (LIDYL, Saclay) ; Guyot, C. (IRFU, Saclay) et al.
The spatial dependence of the timing performance of the R3809U-50 Micro-Channel-Plate PMT (MCP-PMT) by Hamamatsu was studied in high energy muon beams. [...]
arXiv:1909.12604.
- 6 p.
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2019-12-10
04:11
Precision calculations of dark matter relic abundance / Ala-Mattinen, Kalle ; Kainulainen, Kimmo
The dark matter annihilation channels sometimes involve sharp resonances. [...]
arXiv:1912.02870 ; CERN-TH-2019-214.
- 20 p.
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2019-12-09
18:52
Determination of the strong coupling constant ${\alpha_S}(m_{\mathrm{Z}})$ from measurements of inclusive $\mathrm{W}^{\pm}$ and $Z$ boson production cross sections in proton-proton collisions at $\sqrt{s} = $ 7 and 8 TeV / CMS Collaboration
Twelve measurements of inclusive cross sections of $\mathrm{W^{\pm}} $ and $\mathrm{Z}$ boson production, performed in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, are compared with perturbative quantum chromodynamics calculations at next-to-next-to-leading order (NNLO) accuracy obtained with the CT14, HERAPDF2.0, MMHT14, and NNPDF3.0 parton distribution functions (PDFs). [...]
arXiv:1912.04387 ; CMS-SMP-18-005 ; CERN-EP-2019-259 ; CMS-SMP-18-005-003.
- 2019.
Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext

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2019-12-09
13:47
Measurement of $CP$ violation in $B^0\to D^{*\pm} D^{\mp}$ decays / LHCb Collaboration
The decay-time-dependent $CP$ asymmetry in $B^0 \to D^{*\pm}D^{\mp}$ decays is measured using a data set corresponding to an integrated luminosity of$9$fb$^{-1}$ recorded by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. [...]
arXiv:1912.03723 ; LHCB-PAPER-2019-036.
- 2019.
Fulltext - Related data file(s) - Supplementary information - Fulltext

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2019-12-09
11:43
Behaviour of copper during initial conditioning in the pulse DC system / Profatilova, Iaroslava (CERN) ; Wuensch, Walter (CERN) ; Calatroni, Sergio (CERN)
Conditioning is a process that is used to improve the quality of RF accelerating structures before starting operation at full field and power. [...]
CERN-ACC-2019-0058 ; CLIC-Note-1145.
- 2019. - 10 p.
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