Montull, Marc - Risultato della ricerca

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Global Analysis of Leptophilic $Z^\prime$ Bosons / Buras, Andrzej J. (TUM-IAS, Munich) ; Crivellin, Andreas (CERN ; Zurich U. ; PSI, SLS) ; Kirk, Fiona (Zurich U. ; PSI, SLS) ; Manzari, Claudio Andrea (Zurich U. ; PSI, SLS) ; Montull, Marc (Zurich U. ; PSI, SLS)
New neutral heavy gauge bosons ($Z^\prime$) are predicted within many extensions of the Standard Model. While in case they couple to quarks the LHC bounds are very stringent, leptophilic $Z^\prime$ bosons (even with sizable couplings) can be much lighter and therefore lead to interesting quantum effects in precision observables (like $(g-2)_\mu$) and generate flavour violating decays of charged leptons. [...]
arXiv:2104.07680; AJB-21-3; CERN-56; PSI-PR-21-06; ZU-TH 15/20; CERN-TH-2021-054.- 2021-06-09 - 48 p. - Published in : JHEP 2106 (2021) 068 Article from SCOAP3: PDF; Fulltext: PDF;

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Correlating nonresonant di-electron searches at the LHC to the Cabibbo-angle anomaly and lepton flavor universality violation / Crivellin, Andreas (Zurich U. ; PSI, Villigen ; CERN) ; Manzari, Claudio Andrea (Zurich U. ; PSI, Villigen) ; Montull, Marc (Zurich U. ; PSI, Villigen)
In addition to the existing strong indications for lepton flavour university violation (LFUV) in low energy precision experiments, CMS recently released an analysis of non-resonant di-lepton pairs which could constitute the first sign of LFUV in high-energy LHC searches. In this article we show that the Cabibbo angle anomaly, an (apparent) violation of first row and column CKM unitarity with $\approx3\,\sigma$ significance, and the CMS result can be correlated and commonly explained in a model independent way by the operator $[Q_{\ell q}^{(3)}]_{1111} = (\bar{\ell}_1\gamma^{\mu}\sigma^I\ell_1)(\bar{q}_1\gamma_{\mu}\sigma^Iq_1)$. [...]
arXiv:2103.12003; CERN-TH-2021-036; PSI-PR-21-03; ZU-TH 11/21.- 2021-12-01 - 6 p. - Published in : Phys. Rev. D 104 (2021) 115016 Fulltext: PhysRevD.104.115016 - PDF; 2103.12003 - PDF;

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Global Electroweak Fit and Vector-Like Leptons in Light of the Cabibbo Angle Anomaly / Crivellin, Andreas (CERN ; Zurich U. ; PSI, Villigen) ; Kirk, Fiona (Zurich U. ; PSI, Villigen) ; Manzari, Claudio Andrea (Zurich U. ; PSI, Villigen) ; Montull, Marc (Zurich U. ; PSI, Villigen)
The "Cabibbo Angle Anomaly" (CAA) originates from the disagreement between the CKM elements $V_{ud}$ and $V_{us}$ extracted from superallowed beta and kaon decays, respectively, once compared via CKM unitarity. It points towards new physics with a significance of up to $4\,\sigma$, depending on the theoretical input used, and can be explained through modified $W$ couplings to leptons. [...]
arXiv:2008.01113; CERN-TH-2020-128; PSI-PR-20-11; UZ-TH 26/20.- 2020-12-28 - 34 p. - Published in : JHEP 2020 (2020) 166 Article from SCOAP3: PDF; Fulltext: PDF;

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Higgs Couplings in Composite Models / Montull, Marc (Barcelona, IFAE) ; Riva, Francesco (IPT, Lausanne) ; Salvioni, Ennio (CERN ; Padua U. ; INFN, Padua) ; Torre, Riccardo (Padua U. ; INFN, Padua ; SISSA, Trieste)
We study Higgs couplings in the composite Higgs model based on the coset SO(5)/SO(4). We show that the couplings to gluons and photons are insensitive to the elementary-composite mixings and thus not affected by light fermionic resonances. [...]
arXiv:1308.0559; CERN-PH-TH-2013-183; DFPD-2013-TH-14; LPN13-054.- 2013 - 13 p. - Published in : Phys. Rev. D 88 (2013) 095006 APS published version, local copy: PDF; External link: Preprint

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Emergent Gauge Fields in Holographic Superconductors / Domènech, Oriol ; Montull, Marc ; Pomarol, Alex ; Salvio, Alberto ; Silva, Pedro J
Holographic superconductors have been studied so far in the absence of dynamical electromagnetic fields, namely in the limit in which they coincide with holographic superfluids. It is possible, however, to introduce dynamical gauge fields if a Neumann-type boundary condition is imposed on the AdS-boundary. [...]
arXiv:1005.1776.- 2010 - 19 p. - Published in : JHEP 08 (2010) 033 External link: Preprint

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