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CERN Published Articles

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2019-12-11
06:28
Di-Higgs results from the ATLAS and CMS experiments / Kagan, Michael (SLAC) /ATLAS ; CMS
Measurements of di-Higgs production are of fundamental importance to understanding the process of electroweak symmetry breaking and the structure of the Higgs potential. While the Standard Model (SM) predicted production crosssection for this process is too small to be observed by current LHC datasets, searches for this process at the ATLAS and CMS experiments can set limits on theSM production rate, anomalous Higgs self-couplings and Beyond the SM di-Higgs interaction vertices, and contributions to this process from new heavy resonances. [...]
2018 - 6 p. - Published in : (2018) , pp. 135-140
In : 53rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 10 - 17 Mar 2018, pp.135-140

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2019-12-10
08:56
Multiboson production measurements at the CMS experiment / Bellan, Riccardo (INFN, Turin ; Turin U.) /CMS
Precision measurements of multiboson production are a validation of the Standard Model. These multiboson processes are a background to Higgs boson measurements and searches for Beyond the Standard Model physics. [...]
SISSA, 2019 - 4 p. - Published in : PoS ICHEP2018 (2019) 194 Fulltext: PDF;
In : XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.194

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2019-12-10
08:56
Searches for heavy neutral lepton production and lepton flavour violation in kaon decays at the NA62 experiment / Zamkovsky, Michal (Charles U.) /NA62
Search for heavy neutral lepton (HNL) production and lepton flavor and number violation (LFV/LNV) in charged kaon decays using the data collected by Kaon experiment NA62 at CERN are reported. Upper limits are established on the elements of the extended neutrino mixing matrix for heavy neutral lepton mass in the range 130-450 MeV, improving on the results from previous HNL production search. [...]
SISSA, 2019 - 4 p. - Published in : PoS ICHEP2018 (2019) 188 Fulltext: PDF;
In : XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.188

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2019-12-10
08:56
Measurements of heavy flavor properties at CMS / Chen, Po-Hsun (Taiwan, Natl. Taiwan U.) /CMS
A new decay channel $B_{s2}(5840)^{0}\to{}B^{0}K_{s}$ has been observed by $6.3\sigma$ to $7.0\sigma$. Accompanied with the obserservation, there is also a hint of $B_{s1}\pm{}B^{∗0}K_{s}$. [...]
SISSA, 2019 - 4 p. - Published in : PoS ICHEP2018 (2019) 179 Fulltext: PDF;
In : XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.179

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2019-12-10
08:56
Studies of the CKM matrix elements and $b$-hadron production using semileptonic decays at LHCb / Vazquez Gomez, Ricardo (CERN) /LHCb
Exclusive semileptonic $b$-hadron decays are under good theoretical control, which allows precise determinations of the CKM matrix elements, $V_{ub}$ and $V_{cb}$. The large production of $\Lambda_b$ baryons and $B_s$ mesons at the LHC allows LHCb to provide complementary information with respect to the B-factories in this sector, as well as in the measurement of the shape of the $\Lambda_b$ differential decay rates. [...]
SISSA, 2019 - 4 p. - Published in : PoS ICHEP2018 (2019) 177 Fulltext: PDF;
In : XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.177

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2019-12-03
07:04
$t\bar{t}$ production in the forward region at LHCb / Vieites Diaz, M (Santiago de Compostela U.) /LHCb
Despite having an optimised design for b-physics, the LHCb spectrometer may beused as a general purpose detector in the forward region, covering thepseudorapidity $(η)$ range from 2 to 5. Its outstanding vertexing and particleidentification performances allow for an efficient tagging of heavy flavouredjets, and the separation of jets originating from $b$ and $c$ quarks. [...]
2018 - 4 p. - Published in : (2018) , pp. 391-394
In : 53rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 10 - 17 Mar 2018, pp.391-394

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2019-12-03
07:04
Search for heavy neutral lepton production in kaon decays / Parkinson, C J (Birmingham U.) /NA62
A search for heavy neutral lepton (HNL) production in charged kaon decays usinga data sample collected with a minimum bias trigger by the NA62 experiment atCERN in 2015 is reported. Upper limits are established on the elements of theextended neutrino mixing matrix for HNL mass in the range 170 − 448 MeV/$c^2$.This improves on the results from previous HNL production searches, setting morestringent limits and extending the mass range..
2018 - 6 p. - Published in : (2018) , pp. 297-302
In : 53rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 10 - 17 Mar 2018, pp.297-302

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2019-11-30
06:43
Studies of open charm production and properties at LHCb / O'Hanlon, Daniel (INFN, Bologna) /LHCb
Copious production of open-charm mesons and baryons at the LHC, in addition to the flexible trigger scheme, and excellent momentum resolution, impact-parameter, and particle identification capabilities of the LHCb detector, results in some of the most precise measurements to-date on the production and properties of open-charm hadrons. In particular, measurements of the $D_s^{+}$ meson production asymmetry at $\sqrt{s} = 7$ and $8$ TeV, and a high precision measurement of the $\Omega_c^0$ baryon lifetime, are presented. [...]
SISSA, 2019 - 4 p. - Published in : PoS ICHEP2018 (2019) 210 Fulltext from publisher: PDF;
In : XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.210

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2019-11-29
07:03
Testable leptogenesis scenarios and phenomenological implications / Lopez-Pavon, J (CERN)
The simplest extension of the Standard Model (SM) that can account for neutrinomasses consists in the addition of 2 right-handed neutrinos to the SM fieldcontent. In addition to the generation of the light neutrino mass and mixingpattern measured in neutrino oscillation experiments, the low scale realizationof the model provides an explanation for the matter-antimatter asymmetry of theUniverse via ARS leptogenesis, with right-handed neu-trino masses in the range[0.1-100] GeV. [...]
2018 - 6 p. - Published in : (2018) , pp. 291-296
In : 53rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 10 - 17 Mar 2018, pp.291-296

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2019-11-29
07:03
The reactor neutrino anomaly: status and recent developments / Dentler, M (Mainz U.) ; Alvaro Hernandez-Cabezudo, A (KIT, Karlsruhe) ; Kopp, J (Mainz U. ; CERN) ; Machado, P (Fermilab) ; Maltoni, M (Madrid, IFT) ; Martinez-Soler, I (Madrid, IFT) ; Schwetz, T (KIT, Karlsruhe)
The observed antineutrino flux from nuclear reactors is consistently lower thanpredicted. This anomaly could hint at oscillations of active neutrinos into anew sterile neutrino species, or it could simply be a reflection ofunderestimated systematic uncertainties in the theoretical flux prediction. [...]
2018 - 6 p. - Published in : (2018) , pp. 273-278
In : 53rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 10 - 17 Mar 2018, pp.273-278

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