SCOAP3 Repository 12 records found  1 - 10nextSearch took 0.02 seconds. 
1. Anomalies in bottom from new physics in top / Camargo-Molina, José Eliel ; Celis, Alejandro ; Faroughy, Darius A.
We analyze the possibility to accommodate current b→sℓ+ℓ− anomalies with TeV-scale mediators that couple to right-handed top quarks and muons, contributing to b→sℓ+ℓ− at the one-loop level. [...]
Published in Physics letters B (2018) 10.1016/j.physletb.2018.07.051
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2. Yukawa enhancement of Z -mediated new physics in ∆ S = 2 and ∆ B = 2 processes / Bobeth, Christoph ; Buras, Andrzej ; Celis, Alejandro ; Jung, Martin
We discuss Yukawa-enhanced contributions from Z -mediated new physics to down-type quark Δ F = 2 processes in the framework of the standard model gauge-invariant effective theory (SMEFT). [...]
Published in JHEP 1707 (2017) 124 10.1007/JHEP07(2017)124 arXiv:1703.04753
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3. DsixTools: the standard model effective field theory toolkit / Celis, Alejandro ; Fuentes-Martín, Javier ; Vicente, Avelino ; Virto, Javier
We present DsixTools, a Mathematica package for the handling of the dimension-six standard model effective field theory. [...]
Published in EPJC 77 (2017) 405 10.1140/epjc/s10052-017-4967-6
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4. Scalar contributions to b → c ( u ) τν transitions / Celis, Alejandro ; Jung, Martin ; Li, Xin-Qiang ; Pich, Antonio
We perform a comprehensive analysis of scalar contributions in b→cτν transitions including the latest measurements of R(D(⁎)) , the q2 differential distributions in B→D(⁎)τν , the τ polarization asymmetry for B→D⁎τν , and the bound derived from the total width of the Bc meson. [...]
Published in Physics letters B (2017) 10.1016/j.physletb.2017.05.037
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5. Patterns of flavour violation in models with vector-like quarks / Bobeth, Christoph ; Buras, Andrzej ; Celis, Alejandro ; Jung, Martin
We study the patterns of flavour violation in renormalisable extensions of the Standard Model (SM) that contain vector-like quarks (VLQs) in a single complex representation of either the SM gauge group G SM or G SM ′ ≡ G SM  ⊗ U(1)L μ  − L τ . [...]
Published in JHEP 1704 (2017) 079 10.1007/JHEP04(2017)079 arXiv:1609.04783
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6. Phenomenology of an SU(2) × SU(2) × U(1) model with lepton-flavour non-universality / Boucenna, Sofiane ; Celis, Alejandro ; Fuentes-Martín, Javier ; Vicente, Avelino ; et al
We investigate a gauge extension of the Standard Model in light of the observed hints of lepton universality violation in b → cℓν and b → sℓ + ℓ − decays at BaBar, Belle and LHCb. [...]
Published in JHEP 1612 (2016) 059 10.1007/JHEP12(2016)059 arXiv:1608.01349
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7. Non-abelian gauge extensions for B-decay anomalies / Boucenna, Sofiane M. ; Celis, Alejandro ; Fuentes-Martín, Javier ; Vicente, Avelino ; et al
We study the generic features of minimal gauge extensions of the Standard Model in view of recent hints of lepton-flavor non-universality in semi-leptonic b→sℓ+ℓ− and b→cℓν decays. [...]
Published in Physics letters B (2016) 10.1016/j.physletb.2016.06.067
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8. Stringy explanation of b → sℓ + ℓ − anomalies / Celis, Alejandro ; Feng, Wan-Zhe ; Lüst, Dieter
We show that the recent anomalies in b → sℓ + ℓ − transitions observed by the LHCb collaboration can be accommodated within string motivated models with a low mass Z ′ gauge boson. [...]
Published in JHEP 1602 (2016) 007 10.1007/JHEP02(2016)007 arXiv:1512.02218
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9. Flavour-changing top decays in the aligned two-Higgs-doublet model / Abbas, Gauhar ; Celis, Alejandro ; Li, Xin-Qiang ; Lu, Jie ; et al
We perform a complete one-loop computation of the two-body flavour-changing top decays t → ch and t → cV ( V = γ , Z ), within the aligned two-Higgs-doublet model. [...]
Published in JHEP 1506 (2015) 005 10.1007/JHEP06(2015)005 arXiv:1503.06423
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10. A class of invisible axion models with FCNCs at tree level / Celis, Alejandro ; Fuentes-Martín, Javier ; Serôdio, Hugo
We build a class of invisible axion models with tree-level Flavor Changing Neutral Currents completely controlled by the fermion mixing matrices. [...]
Published in JHEP 1412 (2014) 167 10.1007/JHEP12(2014)167 arXiv:1410.6218
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