recid:1753632 - Резултати от търсенето

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Challenges for New Physics in the Flavour Sector / Crivellin, Andreas (CERN)
In these proceedings I present a personal perspective of the challenges for new physics (NP) searches in the flavour sector. [...]
arXiv:1409.0922 ; CERN-PH-TH-2014-166. - 2014. - 27 p.
Preprint - Full text

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Overview of flavour physics with focus on the MSSM and 2HDMs / Crivellin, Andreas (CERN)
In these proceedings we give a concise review of some selected flavour-violation processes and their implications for two-Higgs-doublet models (2HDMs) and the MSSM. The processes under investigation are $\Delta F=2$ processes, $B_s\to\mu^+\mu^-$, $b\to s\gamma$, and tauonic $B$ decays. [...]
arXiv:1405.3701; CERN-PH-TH-2014-090.- 2014 - 4 p. External link: Preprint
In : 49th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 22 - 29 Mar 2014, pp.103-106

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(53)

New Physics in $B$ decays / Crivellin, Andreas (CERN)
While the LHC did not observe direct evidence for physics beyond the standard model, indirect hints for new physics were uncovered in the flavour sector in the decays $B\to K^*\mu^+\mu^-$, $B\to K\mu^+\mu^-/B\to Ke^+e^-$, $B_s\to\phi\mu^+\mu^-$, $B\to D^{(*)}\tau\nu$ and $h\to\tau^\pm\mu^\mp$. Each observable deviates from the SM predictions at the $2-3\,\sigma$ level only, but combining all $b\to s\mu^+\mu^-$ data via a global fit, one finds $4-5\,\sigma$ difference for NP compared to the SM and combining $B\to D^{*}\tau\nu$ with $B\to D\tau\nu$ one obtains $3.9\,\sigma$. [...]
CERN-PH-TH-2015-270; arXiv:1511.04015; CERN-PH-TH-2015-270.- Geneva : CERN, 2016-04-26 - 9 p. - Published in : EPJ Web Conf. 118 (2016) 01007 Fulltext: PDF; Preprint: PDF; External link: Preprint
In : Workshop on Flavour changing and conserving processes 2015, Anacapri, Capri Island, Italy, 10 - 12 Sep 2015, pp.01007

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$B$ Decays and Lepton Flavour (Universality) Violation / Crivellin, Andreas (CERN)
LHCb found hints for physics beyond the standard model in $B\to K^*\mu^+\mu^-$, $B\to K^*\mu^+\mu^-/B\to K^*e^+e^-$ and $B_s\to\phi\mu^+\mu^-$. In addition, the BABAR results for $B\to D^{(*)}\tau\nu$ and the CMS excess in $h\to\tau^\pm\mu^\mp$ also point towards lepton flavour (universality) violating new physics. [...]
arXiv:1505.01527; CERN-PH-TH-2015-109; CERN-PH-TH-2015-109.- Geneva Geneva : CERN, CERN, 2016-07 - 8 p. - Published in : Nuovo Cimento C 38 (2016) 134 Fulltext: arXiv:1505.01527 - PDF; fulltext - PDF; SIF Open Access article: PDF; External link: Preprint
In : 29th Rencontres de Physique de La Vallée d'Aoste, La Thuile, Aosta Valley, Italy, 1 - 7 Mar 2015, pp.134

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Tauonic $B$ decays and Higgs mediated flavour violation / Crivellin, Andreas (CERN)
In these proceedings we review the impact of the tauonic $B$ decays $B\to\tau\nu$, $B\to D\tau\nu$ and $B\to D^*\tau\nu$ on Higgs mediated flavour violation. [...]
arXiv:1410.8557. - 2014. - 6 p.
Preprint - Full text

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Charged Higgs: Interpretation of $B$-physics results / Crivellin, Andreas (CERN)
In these proceedings we review the impact of additional Higgs bosons on $B$ physics observables. For this purpose, we consider first the 2HDM of type II which respects natural flavour conservation. [...]
arXiv:1412.2512; CERN-PH-TH-2014-251; CERN-PH-TH-2014-251.- SISSA, 2015-02-18 - 9 p. - Published in : PoS Charged2014 (2015) 015 Fulltext: PDF; Published version from PoS: PDF; External link: PoS server
In : 5th International Workshop: Prospects for Charged Higgs Discovery at Colliders, Uppsala, Sweden, 16 - 18 Sep 2014, pp.015

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Explaining the LHC flavour anomalies / Crivellin, Andreas (CERN) ; D'Ambrosio, Giancarlo (CERN) ; Heeck, Julian (Brussels U.)
The LHC observed deviations from the Standard Model (SM) in the flavour sector: LHCb found a $4.3\,\sigma$ discrepancy compared to the SM in $b\to s\mu\mu$ transitions and CMS reported a non-zero measurement of $h\to\mu\tau$ with a significance of $2.4\,\sigma$. Here we discuss how these deviations from the SM can be explained, focusing on two models with gauged $L_\mu-L_\tau$ symmetry. [...]
arXiv:1505.02026; CERN-PH-TH-2015-111.- Geneva Geneva : CERN, CERN, 2015 - 6 p. - Published in : , pp. 101-106 Fulltext: PDF; Preprint: PDF; fulltext: PDF; External link: Preprint
In : 50th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 21 - 28 Mar 2015, pp.101-106

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Lepton-flavour violating $B$ decays in generic $Z'$ models / Crivellin, Andreas (CERN) ; Hofer, Lars (Barcelona, Autonoma U.) ; Matias, Joaquim (Barcelona, Autonoma U.) ; Nierste, Ulrich (KIT, Karlsruhe, TTP) ; Pokorski, Stefan (Warsaw U.) ; Rosiek, Janusz (Warsaw U.)
LHCb has reported deviations from the SM expectations in $B\to K^* \mu^+\mu^-$ angular observables, in $B_s\to\phi\mu^+\mu^-$ and in ratio $R(K)=Br[B\to K \mu^+\mu^-]/Br[B\to K e^+e^-]$. For all three decays, a heavy neutral gauge boson mediating $b\to s\mu^+\mu^-$ transitions is a prime candidate for an explanation. [...]
arXiv:1504.07928; CERN-PH-TH-2015-091.- Geneva : CERN, 2015 - 10 p. - Published in : Phys. Rev. D 92 (2015) 054013 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint

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Rare Decays / Chen, Kai-Feng (Taiwan, Natl. Taiwan U.)
Studies of rare decays play an important role in the search of physics beyond the standard model. [...]
CMS-CR-2017-318 ; arXiv:1710.05418. - 2017. - 6 p.
Preprint

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Correlating $\epsilon^\prime/\epsilon$ to hadronic $B$ decays via $U(2)^3$ flavour symmetry / Crivellin, Andreas (PSI, Villigen ; Zurich U.) ; Gross, Christian (INFN, Pisa ; Pisa U. ; CERN) ; Pokorski, Stefan (Warsaw U.) ; Vernazza, Leonardo (Nikhef, Amsterdam)
There are strong similarities between charge-parity (CP) violating observables in hadronic $B$ decays (in particular $\Delta A^-_{\rm CP}$ in $B\to K\pi$) and direct CP violation in Kaon decays ($\epsilon^\prime$): All these observables are very sensitive to new physics (NP) which is at the same time CP and isospin violating (i.e. NP with complex couplings which are different for up quarks and down quarks). [...]
arXiv:1909.02101; PSI-PR-19-18; UZ-TH 41/19; CERN-TH-2019-142; Nikhef/2019-041, INT-PUB-19-041; Nikhef/2019-041, INT-PUB-19-041.- 2020-01-29 - 8 p. - Published in : Phys. Rev. D 101 (2020) 015022 Article from SCOAP3: PDF; Fulltext: PDF; Published fulltext: PDF;

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