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19912026
Showing 2019 · hep-phShow all

16 papers · 2 filters

hep-ph2019★ 19 cited

Crunching Away the Cosmological Constant Problem: Dynamical Selection of a Small

Itay M. Bloch, Csaba Csáki, Michael Geller +1

We propose a novel explanation for the smallness of the observed cosmological constant (CC). Regions of space with a large CC are short lived and are dynamically driven to crunch s…

hep-ph2019★ 22 cited

Probing the two-neutrino exchange force using atomic parity violation

Mitrajyoti Ghosh, Yuval Grossman, Walter Tangarife

The exchange of two neutrinos at one loop leads to a long-range parity-violating force between fermions. We explore the two-neutrino force in the backdrop of atomic physics. We poi…

hep-ph2019★ 2 cited

UV Sensitivity of the Axion Mass from Instantons in Partially Broken Gauge Groups

Csaba Csaki, Maximilian Ruhdorfer, Yuri Shirman

We examine the contribution of small instantons to the axion mass in various UV completions of QCD. We show that the reason behind the potential dominance of such contributions is…

hep-ph2019★ 3 cited

The Time Substructure of Jets and Boosted Object Tagging

Matthew D. Klimek

We initiate the study of the time substructure of jets, motivated by the fact that the next generation of detectors at particle colliders will resolve the time scale over which jet…

hep-ph2019★ 65 cited

On the Statistical Treatment of the Cabibbo Angle Anomaly

Yuval Grossman, Emilie Passemar, Stefan Schacht

We point out that testing the equality of the Cabibbo angle as extracted from , the ratio and nuclear decays is not…

hep-ph2019★ 15 cited

Twin Higgs with Exact

Csaba Csáki, Cong-Sen Guan, Teng Ma +1

We present a novel mechanism for realistic electroweak symmetry breaking in Twin Higgs/neutral naturalness models where the exchange symmetry can remain exactly unbroken. The…

hep-ph2019★ 19 cited

Conformal Freeze-In of Dark Matter

Sungwoo Hong, Gowri Kurup, Maxim Perelstein

We present the conformal freeze-in (COFI) scenario for dark matter production. At high energies, the dark sector is described by a gauge theory flowing towards a Banks-Zaks fixed p…

hep-ph2019★ 51 cited

Implications of the LHCb discovery of CP violation in charm decays

Avital Dery, Yosef Nir

The recent measurement of by the LHCb collaboration requires an enhancement coming from hadronic physics in order to be explained within the SM. We examine…

hep-ph2019★ 66 cited

Infrared Singularities of Scattering Amplitudes and NLL Resummation for -Jet Processes

Thomas Becher, Matthias Neubert

We revisit the multi-loop structure of the anomalous-dimension matrix governing the infrared divergences of massless -particle scattering amplitudes in non-abelian gauge theorie…

hep-ph2019★ 167 cited

Axion-like particles, lepton-flavor violation and a new explanation of and

Martin Bauer, Matthias Neubert, Sophie Renner +2

Axion-like particles (ALPs) with lepton-flavor violating couplings can be probed in exotic muon and tau decays. The sensitivity of different experiments depends strongly on the ALP…

hep-ph2019★ 156 cited

The puzzle: an update

Paolo Gambino, Martin Jung, Stefan Schacht

We discuss the impact of the recent untagged analysis of decays by the Belle Collaboration on the extraction of the CKM element and prov…

hep-ph2019★ 20 cited

Dynamical origin of flavor hierarchies in a warped extra dimension

Aqeel Ahmed, Adrian Carmona, Javier Castellano Ruiz +2

Extensions of the Standard Model featuring a warped extra dimension compactified on an orbifold, in which the fermions and gauge bosons live in the bulk of the f…

hep-ph2019★ 8 cited

Generating a Higgs Quartic

Csaba Csáki, Cong-sen Guan, Teng Ma +1

We present a simple mechanism for generating a Higgs quartic in composite Higgs models without a corresponding quadratic term. The extra quartic will originate from a Higgs depende…

hep-ph2019★ 13 cited

Clockwork Neutrinos

Sungwoo Hong, Gowri Kurup, Maxim Perelstein

Clockwork (CW) mechanism can explain the smallness of neutrino masses without introducing unnaturally small input parameters. In this paper we study the simplest CW neutrino model,…

hep-ph2019★ 81 cited

The Emergence of the Rule in Charm Physics

Yuval Grossman, Stefan Schacht

We discuss the implications of the recent discovery of CP violation in two-body SCS decays by LHCb. We show that the result can be explained within the SM without the need for…

hep-ph2019★ 36 cited

Effective Theory for a Heavy Scalar Coupled to the SM via Vector-Like Quarks

Stefan Alte, Matthias Koenig, Matthias Neubert

We illustrate the application of the recently developed SCET framework in the context of a specific model, in which the Standard Model (SM) is supplemented by a heavy s…