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Asatrian, H. M.; Ewerth, Thorsten; Ferroglia, Andrea; Greub, Christoph; Ossola, Giovanni

doi:10.1103/physrevd.82.074006

Cited by 24 publications

(24 citation statements)

References 52 publications

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“…the calculation in ref. [27] revealed that the α 2 s β 0 term is not a good approximation to the full result. In light of this finding we do not advocate the use of naive non-abelianization in our case.…”

Section: Jhep10(2017)191mentioning

confidence: 97%

Towards next-to-next-to-leading-log accuracy for the width difference in the $$ {B}_s-{\overline{B}}_s $$ system: fermionic contributions to order (m c /m b )0 and (m c /m b )1

Asatrian

Hovhannisyan

Nierste

et al. 2017

J. High Energ. Phys.

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Towards next-to-next-to-leading-log accuracy for the width difference in the B s −B s system: fermionic contributions to order Abstract: We calculate a class of three-loop Feynman diagrams which contribute to the next-to-next-to-leading logarithmic approximation for the width difference ∆Γ s in the B s −B s system. The considered diagrams contain a closed fermion loop in a gluon propagator and constitute the order α 2 s N f , where N f is the number of light quarks. Our results entail a considerable correction in that order, if ∆Γ s is expressed in terms of the pole mass of the bottom quark. If the MS scheme is used instead, the correction is much smaller. As a result, we find a decrease of the scheme dependence. Our result also indicates that the usually quoted value of the NLO renormalization scale dependence underestimates the perturbative error.

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Section: Jhep10(2017)191mentioning

confidence: 97%

Towards next-to-next-to-leading-log accuracy for the width difference in the $$ {B}_s-{\overline{B}}_s $$ system: fermionic contributions to order (m c /m b )0 and (m c /m b )1

Asatrian

Hovhannisyan

Nierste

et al. 2017

J. High Energ. Phys.

Self Cite

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“…(3)(4), as the remaining ones can be neglected due to their small Wilson coefficients. The Q 7 -Q 7 and Q 7 -Q 8 interference terms are already known at O(α 2 s ) in a complete manner [32][33][34][35][36]. The NNLO interference terms not involving Q 7 can be separated into two-body final state contributions (trivially derived from the NLO results) or relatively small (n ≥ 3)-body final state contributions that have been calculated so far [37][38][39] only in the Brodsky-LepageMackenzie (BLM) [40] approximation.…”

Section: The Ratio R γ In the Sm And 2hdmmentioning

confidence: 99%

Weak radiative decays of the B meson and bounds on $$M_{H^\pm }$$ M H ± in the Two-Higgs-Doublet Model

2017

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In a recent publication (Abdesselam et al. arXiv:1608.02344), the Belle collaboration updated their analysis of the inclusive weak radiative B-meson decay, including the full dataset of (772 ± 11) × 10 6 BB pairs. Their result for the branching ratio is now below the Standard Model prediction (Misiak et al. Phys Rev Lett 114:221801, 2015, Czakon et al. JHEP 1504:168, 2015, though it remains consistent with it. However, bounds on the charged Higgs boson mass in the Two-Higgs-Doublet Model get affected in a significant manner. In the so-called Model II, the 95% C.L. lower bound on M H ± is now in the 570-800 GeV range, depending quite sensitively on the method applied for its determination. Our present note is devoted to presenting and discussing the updated bounds, as well as to clarifying several ambiguities that one might encounter in evaluating them. One of such ambiguities stems from the photon energy cutoff choice, which deserves re-consideration in view of the improved experimental accuracy.

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“…The allowed region depends on higherorder QCD effects. A huge effort has been made devoted to the calculation of these corrections, the bulk of which are the same as in the SM [164][165][166][167][168][169][170][171][172][173][174][175][176][177][178][179][180][181][182][183]. They are now complete up to NNLO order.…”

Section: Constraints From H + Loop-level Exchangementioning

confidence: 99%

Prospects for charged Higgs searches at the LHC

et al. 2017

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The goal of this report is to summarize the current situation and discuss possible search strategies for charged scalars, in non-supersymmetric extensions of the Standard Model at the LHC. Such scalars appear in Multi-HiggsDoublet models, in particular in the popular Two-HiggsDoublet model, allowing for charged and additional neutral Higgs bosons. These models have the attractive property that electroweak precision observables are automatically in agreement with the Standard Model at the tree level. For the most popular version of this framework, Model II, a discovery of a charged Higgs boson remains challenging, since the parameter space is becoming very constrained, and the QCD background is very high. We also briefly comment on models with dark matter which constrain the corresponding charged a e-mail: Maria.Krawczyk@fuw.edu.pl b e-mail: Per.Osland@uib.no scalars that occur in these models. The stakes of a possible discovery of an extended scalar sector are very high, and these searches should be pursued in all conceivable channels, at the LHC and at future colliders.

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Complete(O7,O8)contribution toB¯→X

Cited by 24 publications

References 52 publications

Towards next-to-next-to-leading-log accuracy for the width difference in the $$ {B}_s-{\overline{B}}_s $$ system: fermionic contributions to order (m c /m b )0 and (m c /m b )1

Towards next-to-next-to-leading-log accuracy for the width difference in the $$ {B}_s-{\overline{B}}_s $$ system: fermionic contributions to order (m c /m b )0 and (m c /m b )1

Weak radiative decays of the B meson and bounds on $$M_{H^\pm }$$ M H ± in the Two-Higgs-Doublet Model

Prospects for charged Higgs searches at the LHC

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