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19912026
Showing 2019 · hep-phShow all

15 papers · 2 filters

hep-ph2019★ 19 cited

Loop Dominated Signals from Neutrino Portal Dark Matter

Hiren H. Patel, Stefano Profumo, Bibhushan Shakya

We study scenarios where loop processes give the dominant contributions to dark matter decay or annihilation despite the presence of tree level channels. We illustrate this possibi…

hep-ph2019★ 14 cited

Parity-Violating Møller Scattering at NNLO: Closed Fermion Loops

Yong Du, Ayres Freitas, Hiren H. Patel +1

A complete, gauge-invariant computation of two loop virtual corrections involving closed fermion loops to the polarized Møller scattering asymmetry is presented. The set of contrib…

hep-ph2019★ 11 cited

Superradiance and the Spins of Black Holes from LIGO and X-ray binaries

Nicolas Fernandez, Akshay Ghalsasi, Stefano Profumo

Measurements of the spin of stellar mass black holes (BHs) are now possible both through LIGO observations of binary BH mergers and for BHs in X-ray binary systems. The spins of BH…

hep-ph2019★ 5 cited

One-Loop Charge-Breaking Minima in the Two-Higgs Doublet Model

Pedro M. Ferreira, Logan A. Morrison, Stefano Profumo

We analyze the vacuum structure of the one-loop effective potential in the two Higgs doublet model. We find that electroweak-breaking vacuua can coexist with charge breaking ones,…

hep-ph2019★ 32 cited

Light Dark Matter from Entropy Dilution

Jared A. Evans, Akshay Ghalsasi, Stefania Gori +2

We show that a thermal relic which decouples from the standard model (SM) plasma while relativistic can be a viable dark matter (DM) candidate, if the decoupling is followed by a p…

hep-ph2019★ 55 cited

Gauging the accidental symmetries of the Standard Model, and implications for the flavour anomalies

Wolfgang Altmannshofer, Joe Davighi, Marco Nardecchia

We explore the possibility that lepton family numbers and baryon number are such good symmetries of Nature because they are the global remnant of a spontaneously broken gauge symme…

hep-ph2019★ 62 cited

The Majoron at two loops

Julian Heeck, Hiren H. Patel

We present singlet-Majoron couplings to Standard Model particles through two loops at leading order in the seesaw expansion, including couplings to gauge bosons as well as flavor-c…

hep-ph2019★ 37 cited

Constraining axion-like particles from rare pion decays

Wolfgang Altmannshofer, Stefania Gori, Dean J. Robinson

Ultraviolet completions for axion-like particles (ALPs) lighter than the neutral pion generically induce ALP-neutral pion mixing, and are therefore sensitive to direct constraints…

hep-ph2019★ 73 cited

Hazma: A Python Toolkit for Studying Indirect Detection of Sub-GeV Dark Matter

Adam Coogan, Logan Morrison, Stefano Profumo

With several proposed MeV gamma-ray telescopes on the horizon, it is of paramount importance to perform accurate calculations of gamma-ray spectra expected from sub-GeV dark matter…

hep-ph2019★ 7 cited

Doubly Blind Spots in Scalar Dark Matter Models

Wolfgang Altmannshofer, Brian Maddock, Stefano Profumo

We consider a framework where the Standard Model is augmented by a second SU(2) scalar doublet and by a real scalar singlet that, protected by a Z2 symmetry, provides a particle Da…

hep-ph2019★ 68 cited

Direct detection of primordial black hole relics as dark matter

Benjamin V. Lehmann, Christian Johnson, Stefano Profumo +1

If dark matter is composed of primordial black holes, such black holes can span an enormous range of masses. A variety of observational constraints exist on massive black holes, an…

hep-ph2019★ 37 cited

Rare Top Decays as Probes of Flavorful Higgs Bosons

Wolfgang Altmannshofer, Brian Maddock, Douglas Tuckler

We study a version of Two Higgs Doublet Models with non-standard flavor violation in the up quark sector. We find branching ratios for the rare top decays and t…

hep-ph2019★ 249 cited

B-decay discrepancies after Moriond 2019

Jason Aebischer, Wolfgang Altmannshofer, Diego Guadagnoli +3

Following the updated measurement of the lepton flavour universality (LFU) ratio R_K in B -> Kll decays by LHCb, as well as a number of further measurements, e.g. R_K* by Belle and…

hep-ph2019★ 25 cited

N = 5, 6, 7, 8: Nested hypothesis tests and truncation dependence of

Florian U. Bernlochner, Zoltan Ligeti, Dean J. Robinson

The determination of from exclusive semileptonic decays is sensitive to the choice of form factor parametrization. Larger values are obtained…

hep-ph2019★ 119 cited

Neutrino Tridents at DUNE

Wolfgang Altmannshofer, Stefania Gori, Justo Martin-Albo +2

The DUNE near detector will collect an unprecedented large number of neutrino interactions, allowing the precise measurement of rare processes such as neutrino trident production,…