Hunting New Physics with Lepton Flavor Universality Violations in B Decays and Asymmetries in Top Pair Production

2013 ◽  
Vol 241-242 ◽  
pp. 146-151
Author(s):  
Jernej F. Kamenik
Keyword(s):  
Pair Production ◽  
New Physics ◽  
B Decays ◽  
Lepton Flavor ◽  
Top Pair Production

scholarly journals Non-resonant new physics in top pair production at hadron colliders

2011 ◽  
Vol 2011 (3) ◽  
Author(s):  
Céline Degrande ◽  
Jean-Marc Gérard ◽  
Christophe Grojean ◽  
Fabio Maltoni ◽  
Géraldine Servant
Keyword(s):  
Pair Production ◽  
New Physics ◽  
Hadron Colliders ◽  
Top Pair Production

scholarly journals New physics in rare B decays after Moriond 2021

2021 ◽  
Vol 81 (10) ◽  
Author(s):  
Wolfgang Altmannshofer ◽  
Peter Stangl
Keyword(s):  
Standard Model ◽  
Global Analysis ◽  
New Physics ◽  
Two Dimensional ◽  
Contact Interactions ◽  
B Decays ◽  
Lepton Flavor ◽  
The Standard Model ◽  
Excellent Description ◽  
Non Gaussian

AbstractThe anomalies in rare B decays endure. We present results of an updated global analysis that takes into account the latest experimental input – in particular the recent results on $$R_K$$ R K and BR$$(B_s \rightarrow \mu ^+\mu ^-)$$ ( B s → μ + μ - ) – and that qualitatively improves the treatment of theory uncertainties. Fit results are presented for the Wilson coefficients of four-fermion contact interactions. We find that muon specific Wilson coefficients $$C_9 \simeq -0.73$$ C 9 ≃ - 0.73 or $$C_9 = -C_{10} \simeq -0.39$$ C 9 = - C 10 ≃ - 0.39 continue to give an excellent description of the data. If only theoretically clean observables are considered, muon specific $$C_{10} \simeq 0.60$$ C 10 ≃ 0.60 or $$C_9=-C_{10} \simeq -0.35$$ C 9 = - C 10 ≃ - 0.35 improve over the Standard Model by $$\sqrt{\Delta \chi ^2} \simeq 4.7\sigma $$ Δ χ 2 ≃ 4.7 σ and $$\sqrt{\Delta \chi ^2} \simeq 4.6\sigma $$ Δ χ 2 ≃ 4.6 σ , respectively. In various new physics scenarios we provide predictions for lepton flavor universality observables and CP asymmetries that can be tested with more data. We update our previous combination of ATLAS, CMS, and LHCb data on BR$$(B_s \rightarrow \mu ^+\mu ^-)$$ ( B s → μ + μ - ) and BR$$(B^0\rightarrow \mu ^+\mu ^-)$$ ( B 0 → μ + μ - ) taking into account the full two-dimensional non-Gaussian experimental likelihoods.

scholarly journals Highly boosted Higgs bosons and unitarity in vector-boson fusion at future hadron colliders

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Wolfgang Kilian ◽  
Sichun Sun ◽  
Qi-Shu Yan ◽  
Xiaoran Zhao ◽  
Zhijie Zhao
Keyword(s):  
Pair Production ◽  
Vector Boson ◽  
New Physics ◽  
Higgs Bosons ◽  
Vector Boson Fusion ◽  
Final State ◽  
Proton Proton ◽  
Effective Lagrangian ◽  
Discovery Potential ◽  
New Interactions

Abstract We study the observability of new interactions which modify Higgs-pair production via vector-boson fusion processes at the LHC and at future proton-proton colliders. In an effective-Lagrangian approach, we explore in particular the effect of the operator $$ {h}^2{W}_{\mu \nu}^a{W}^{a,\mu \nu} $$ h 2 W μν a W a , μν , which describes the interaction of the Higgs boson with transverse vector-boson polarization modes. By tagging highly boosted Higgs bosons in the final state, we determine projected bounds for the coefficient of this operator at the LHC and at a future 27 TeV or 100 TeV collider. Taking into account unitarity constraints, we estimate the new-physics discovery potential of Higgs pair production in this channel.

scholarly journals On the breaking of lepton flavor universality in B decays

2015 ◽  
Vol 2015 (7) ◽  
Author(s):  
Admir Greljo ◽  
Gino Isidori ◽  
David Marzocca
Keyword(s):  
B Decays ◽  
Lepton Flavor

scholarly journals Top-pair production at the LHC through NNLO QCD and NLO EW

2017 ◽  
Vol 2017 (10) ◽  
Author(s):  
Michał Czakon ◽  
David Heymes ◽  
Alexander Mitov ◽  
Davide Pagani ◽  
Ioannis Tsinikos ◽  
...  
Keyword(s):  
Pair Production ◽  
Top Pair Production

scholarly journals Fully-differential top-pair production at a lepton collider: from threshold to continuum

2018 ◽  
Vol 2018 (3) ◽  
Author(s):  
Fabian Bach ◽  
Bijan Chokoufé Nejad ◽  
André H. Hoang ◽  
Wolfgang Kilian ◽  
Jürgen Reuter ◽  
...  
Keyword(s):  
Pair Production ◽  
Fully Differential ◽  
Top Pair Production
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