Implications of perturbative unitarity for scalar di-boson resonance searches at LHC

Luzio, Luca Di; Kamenik, Jernej F.; Nardecchia, Marco

doi:10.1140/epjc/s10052-017-4594-2

Cited by 63 publications

(55 citation statements)

References 74 publications

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“…, which saturates the perturbative unitarity bound [85,86], we find that the updated limit from B s mixing requires M 0 Z ≲ 8 TeV for the 1σ explanation of R K ðÃÞ . Whether a few TeV Z 0 is ruled out or not by direct searches at LHC depends however on the details of the Z 0 model.…”

mentioning

confidence: 64%

Updated Bs -mixing constraints on new physics models for b→sℓ+ℓ
Luzio
¹
,
Kirk
²
,
Lenz
³

2018
Phys. Rev. D
130
7
163
1
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Many new physics models that explain the intriguing anomalies in the b-quark flavor sector are severely constrained by B s mixing, for which the Standard Model prediction and experiment agreed well until recently. The most recent Flavour Lattice Averaging Group (FLAG) average of lattice results for the nonperturbative matrix elements points, however, in the direction of a small discrepancy in this observable Cabibbo-Kobayashi-Maskawa (CKM). Using up-to-date inputs from standard sources such as PDG, FLAG and one of the two leading CKM fitting groups to determine ΔM SM s , we find a severe reduction of the allowed parameter space of Z 0 and leptoquark models explaining the B anomalies. Remarkably, in the former case the upper bound on the Z 0 mass approaches dangerously close to the energy scales already probed by the LHC. We finally identify some model-building directions in order to alleviate the tension with B s mixing.

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mentioning

confidence: 64%

Updated Bs -mixing constraints on new physics models for b→sℓ+ℓ
Luzio
¹
,
Kirk
²
,
Lenz
³

2018
Phys. Rev. D
130
7
163
1
View full text Add to dashboard Cite

show abstract

“…Last but not least, the parameter space is constrained by direct LHC searches [66,67] and perturbative unitarity [68,69]. Whether a few TeV Z is ruled out by LHC direct searches crucially depends on the details of the Z model.…”

Section: Simplified Models For the B → S Anomaliesmentioning

confidence: 99%

“…It is straightforward to rescale the bound for different lepton couplings. The combination of ∆M s and perturbative unitarity (requiring λ L 22 < √ 4π [68,69]) gives an upper bound of M Z 20 TeV from the Average '19 prediction. With the future scenario for ∆M s (orange region) this will improve to about 9 TeV, being a factor of 6 more constraining than the perturbative unitarity bound [68,69].…”

Section: ∆M S Interplay With Flavour Anomalies In the Minimal Scenariosmentioning

confidence: 99%

∆Ms theory precision confronts flavour anomalies

Luzio

Kirk

Lenz

et al. 2019

J. High Energ. Phys.

139

113

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Based on recent HQET sum rule and lattice calculations we present updated Standard Model predictions for the mass differences of neutral B mesons: ∆M SM s = 18.4 +0.7 −1.2 ps −1 and ∆M SM d = 0.533 +0.022 −0.036 ps −1 and study their impact on new physics models that address the present hints of anomalous data in b → s transitions. We also examine future prospects of further reducing the theory uncertainties and discuss the implications of a 2025 scenario with ∆M SM 2025 s = (18.4 ± 0.5) ps −1 . In particular, the latter yields upper bounds M Z 9 TeV and M S 3 30 TeV for the minimal Z and S 3 lepto-quark explanations of the b → s anomalies, respectively.

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“…This raises the question of the expected size of multi-Higgs production in the light of Higgs potential and other constraints (see e.g. [8]). EFT by construction can only provide limited insight in this context, i.e.…”

Section: Introductionmentioning

confidence: 99%

Phenomenology of GUT-inspired gauge-Higgs unification

2020

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We perform a detailed investigation of a Grand Unified Theory (GUT)-inspired theory of gauge-Higgs unification. Scanning the model's parameter space with adapted numerical techniques, we contrast the scenario's low energy limit with existing SM and collider search constraints. We discuss potential modifications of di-Higgs phenomenology at hadron colliders as sensitive probes of the gauge-like character of the Higgs self-interactions and find that for phenomenologically viable parameter choices modifications of the order of 20% compared to the SM cross section can be expected. While these modifications are challenging to observe at the LHC, a future 100 TeV hadron collider might be able to constrain the scenario through more precise di-Higgs measurements. We point out alternative signatures that can be employed to constrain this model in the near future.1 A SU (6)-based scenario was discussed in [30], also demonstrating that proton decay can be avoided. 2 A different variant of evolutionary algorithms, namely genetic algorithms, have been employed in the exploration of viable string theory scenarios and the pMSSM in [33,34].

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Implications of perturbative unitarity for scalar di-boson resonance searches at LHC

Cited by 63 publications

References 74 publications

Updated Bs -mixing constraints on new physics models for b→sℓ+ℓ
Luzio
¹
,
Kirk
²
,
Lenz
³

2018
Phys. Rev. D
130
7
163
1
View full text Add to dashboard Cite

Updated Bs -mixing constraints on new physics models for b→sℓ+ℓ
Luzio
¹
,
Kirk
²
,
Lenz
³

2018
Phys. Rev. D
130
7
163
1
View full text Add to dashboard Cite

∆Ms theory precision confronts flavour anomalies

Phenomenology of GUT-inspired gauge-Higgs unification

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Implications of perturbative unitarity for scalar di-boson resonance searches at LHC

Cited by 63 publications

References 74 publications

Updated Bs -mixing constraints on new physics models for b→sℓ+ℓLuzio1, Kirk2, Lenz3 2018Phys. Rev. D13071631View full textAdd to dashboardCite

Updated Bs -mixing constraints on new physics models for b→sℓ+ℓLuzio1, Kirk2, Lenz3 2018Phys. Rev. D13071631View full textAdd to dashboardCite

∆Ms theory precision confronts flavour anomalies

Phenomenology of GUT-inspired gauge-Higgs unification

Contact Info

Product

Resources

About

Updated Bs -mixing constraints on new physics models for b→sℓ+ℓ
Luzio
¹
,
Kirk
²
,
Lenz
³

2018
Phys. Rev. D
130
7
163
1
View full text Add to dashboard Cite

Updated Bs -mixing constraints on new physics models for b→sℓ+ℓ
Luzio
¹
,
Kirk
²
,
Lenz
³

2018
Phys. Rev. D
130
7
163
1
View full text Add to dashboard Cite