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CERN Document Server 2,009 records found  1 - 10próximoend  jump to record: Search took 3.33 seconds. 
1.
(100)
A seesaw model for large neutrino masses in concordance with cosmology / Escudero, Miguel (CERN) ; Schwetz, Thomas (KIT, Karlsruhe, IAP) ; Terol-Calvo, Jorge (IAC, La Laguna ; Laguna U., Tenerife)
Cosmological constraints on the sum of the neutrino masses can be relaxed if the number density of active neutrinos is reduced compared to the standard scenario, while at the same time keeping the effective number of neutrino species $N_{\rm eff}\approx 3$ by introducing a new component of dark radiation. We discuss a UV complete model to realise this idea, which simultaneously provides neutrino masses via the seesaw mechanism. [...]
arXiv:2211.01729; CERN-TH-2022-180.- 2023-02-14 - 20 p. Fulltext: Addendum - PDF; document - PDF; 2211.01729 - PDF; Publication - PDF;
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2.
(91)
Supernova limits on muonic dark forces / Manzari, Claudio Andrea (UC, Berkeley ; LBL, Berkeley) ; Martin Camalich, Jorge (IAC, La Laguna ; Laguna U., Tenerife ; CERN) ; Spinner, Jonas (U. Heidelberg, ITP ; KIT, Karlsruhe, TTP) ; Ziegler, Robert (Freiburg U. ; KIT, Karlsruhe, TTP)
Proto-neutron stars formed during core-collapse supernovae are hot and dense environments that contain a sizable population of muons. If these interact with new long-lived particles with masses up to roughly 100 MeV, the latter can be produced and escape from the stellar plasma, causing an excessive energy loss constrained by observations of SN 1987A. [...]
arXiv:2307.03143.- 2023-11-13 - 25 p. - Published in : Phys. Rev. D 108 (2023) 103020 Fulltext: PDF;
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3.
(80)
Hyperons during proto-neutron star deleptonization and the emission of dark flavored particles / Fischer, Tobias (Wroclaw U.) ; Martin Camalich, Jorge (IAC, La Laguna ; Laguna U., Tenerife ; CERN) ; Kochankovski, Hristijan (ICC, Barcelona U. ; Skopje U.) ; Tolos, Laura (Barcelona, IEEC ; Frankfurt U., FIAS ; Bucharest, Inst. Space Science)
Complementary to high-energy experimental efforts, indirect astrophysical searches of particles beyond the standard model have long been pursued. [...]
CERN-TH-2024-130 ; arXiv:2408.01406. - 24 p.
Fulltext
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4.
(68)
New constraints on the central mass contents of Omega Centauri from combined stellar kinematics and pulsar timing / Bañares-Hernández, Andrés (IAC, La Laguna ; Laguna U., Tenerife) ; Calore, Francesca (Annecy, LAPTH) ; Camalich, Jorge Martin (IAC, La Laguna ; Laguna U., Tenerife ; CERN) ; Read, Justin I. (Surrey U.)
We perform a combined analysis of stellar kinematics and line-of-sight accelerations of millisecond pulsars to investigate the mass contents of Omega Centauri. [...]
arXiv:2408.00939. - 19.
Fulltext
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5.
(53)
Quark Flavor Phenomenology of the QCD Axion / Martin Camalich, Jorge (IAC, La Laguna ; Laguna U., Tenerife) ; Pospelov, Maxim (Minnesota U. ; Minnesota U., Theor. Phys. Inst.) ; Vuong, Pham Ngoc Hoa (LPSC, Grenoble) ; Ziegler, Robert (CERN ; KIT, Karlsruhe, TTP) ; Zupan, Jure (Cincinnati U.)
Axion models with generation-dependent Peccei-Quinn charges can lead to flavor-changing neutral currents, thus motivating QCD axion searches at precision flavor experiments. We rigorously derive limits on the most general effective flavor-violating couplings from current measurements and assess their discovery potential. [...]
arXiv:2002.04623.- 2020-07-28 - 24 p. - Published in : Phys. Rev. D 102 (2020) 015023 Article from SCOAP3: PDF; Fulltext: PDF;
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6.
(52)
A search for dark matter in Triangulum II with the MAGIC telescopes / MAGIC Collaboration
We present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 hours of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper limits on both the differential and integral gamma-ray flux are presented. [...]
arXiv:2003.05260.- 2020-05 - 14 p. - Published in : Phys. Dark Univ.: 28 (2020) , pp. 100529
Fulltext: PDF;
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7.
(51)
The Mono-Tau Menace: From $B$ Decays to High-$p_T$ Tails / Greljo, Admir (CERN) ; Martin Camalich, Jorge (CERN ; IAC, La Laguna ; Laguna U., Tenerife) ; Ruiz-Álvarez, José David (Antioquia U.)
We investigate the crossing-symmetry relation between $b\to c\tau^-\bar\nu$ decay and $b\bar c\to \tau^-\bar\nu$ scattering to derive direct correlations of New Physics in semi-tauonic $B$-meson decays and the mono-tau signature at the LHC ($pp\to\tau_h X$ + MET). Using an exhaustive set of effective operators and heavy mediators we find that the current ATLAS and CMS data constrain scenarios addressing anomalies in $B$-decays. [...]
arXiv:1811.07920.- 2019-04-06 - 7 p. - Published in : Phys. Rev. Lett. 122 (2019) 131803 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF;
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8.
(51)
Bounds on Lorentz invariance violation from MAGIC observation of GRB 190114C / MAGIC Collaboration
On January 14, 2019, the Major Atmospheric Gamma Imaging Cherenkov telescopes detected GRB 190114C above 0.2 TeV, recording the most energetic photons ever observed from a gamma-ray burst. We use this unique observation to probe an energy dependence of the speed of light in vacuo for photons as predicted by several quantum gravity models. [...]
arXiv:2001.09728.- 2020-07-09 - 7 p. - Published in : Phys. Rev. Lett. 125 (2020) 021301 Fulltext: PDF;
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9.
(44)
New Physics Searches at Kaon and Hyperon Factories / Goudzovski, Evgueni (Birmingham U.) ; Redigolo, Diego (CERN ; INFN, Florence) ; Tobioka, Kohsaku (Florida State U. ; KEK, Tsukuba) ; Zupan, Jure (Cincinnati U.) ; Alonso-Álvarez, Gonzalo (McGill U.) ; Alves, Daniele S.M. (Los Alamos) ; Bansal, Saurabh (Cincinnati U.) ; Bauer, Martin (Durham U., ICC) ; Brod, Joachim (Cincinnati U.) ; Chobanova, Veronika (Santiago de Compostela U., IGFAE) et al.
Rare meson decays are among the most sensitive probes of both heavy and light new physics. Among them, new physics searches using kaons benefit from their small total decay widths and the availability of very large datasets. [...]
arXiv:2201.07805; FERMILAB-PUB-22-057-T.- 2023-01-06 - 68 p. - Published in : Rep. Prog. Phys. 86 (2023) 016201 Fulltext: jt - PDF; 2201.07805 - PDF; 20769f2ea1acd21399f56329734230a9 - PDF; External link: Fermilab Accepted Manuscript
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10. Recommendations of the Finance Committee to Council as to the Financing of the 1965 Supplementary Programme
Recommandations du Comité des Finances au Conseil au sujet du financement du programme supplémentaire pour 1965
CERN/0572
28th Session of Council ; 1964
English: PDF
French: PDF
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