539 citations · 2.8k across the 66 of their papers we have counts for
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How Macroscopic Limits on Neutron Star Baryon Loss Yield Microscopic Limits on Non-Standard-Model Baryon Decay
Jeffrey M. Berryman, Susan Gardner, Mohammadreza Zakeri
We investigate how our baryon-loss limits from anomalous binary-pulsar period lengthening can be interpreted microscopically to yield specific constraints on the particle physics o…
On Baryon and Lepton Number Violation
Pavel Fileviez Perez, Andrea Pocar, K. S. Babu +11
In this report we discuss the main theories to understand the origin of baryon and lepton number violation in physics beyond the Standard Model. We present the theoretical predicti…
Theories and Experiments for Testable Baryogenesis Mechanisms: A Snowmass White Paper
J. L. Barrow, Leah Broussard, James M. Cline +16
The baryon asymmetry of the Universe is one of the central motivations to expect physics beyond the Standard Model. In this Snowmass white paper, we review the challenges and oppor…
QCD Analysis of Hadronic Parity Violation
Susan Gardner, Girish Muralidhara
We present a QCD analysis of the effective weak Hamiltonian at hadronic energy scales for strangeness-nonchanging () hadronic processes. Performing a leading-order renormaliz…
Neutron Stars with Baryon Number Violation, Probing Dark Sectors
Jeffrey M. Berryman, Susan Gardner, Mohammadreza Zakeri
The neutron lifetime anomaly has been used to motivate the introduction of new physics with hidden-sector particles coupled to baryon number, and on which neutron stars provide pow…
LC Circuits for the Direct Detection of Ultralight Dark Matter Candidates
Christopher M. Donohue, Susan Gardner, Wolfgang Korsch
Cosmological mechanisms that yield ultralight dark matter are insensitive to the intrinsic parity of a bosonic dark matter candidate, but that same quantity plays a crucial role in…
Neutron star structure with a new force between quarks
Jeffrey M. Berryman, Susan Gardner
The discovery of nondiffuse sources of gravitational waves through compact-object mergers opens new prospects for the study of physics beyond the Standard Model. In this paper, we…
: A State of the Field, and Looking Forward--A brief status report of theoretical and experimental physics opportunities
Kaladi Babu, Joshua Barrow, Zurab Berezhiani +21
The origin of the matter-antimatter asymmetry apparently obligates the laws of physics to include some mechanism of baryon number () violation. Searches for interactio…
LIght scalars with lepton number to solve the anomaly
Susan Gardner, Xinshuai Yan
Scalars that carry lepton number can help mediate would-be lepton-number-violating processes, such as neutrinoless double decay or lepton-scattering-mediated nucleon-antinucleo…
Patterns of CP violation from mirror symmetry breaking in the Dalitz plot
Susan Gardner, Jun Shi
A violation of mirror symmetry in the Dalitz plot has long been recognized as a signal of C and CP violation. Here we show how the isospin of the underlying C- and…
Processes that break baryon number by two units and the Majorana nature of the neutrino
Susan Gardner, Xinshuai Yan
We employ the simplest possible models of scalar-fermion interactions that are consistent with the gauge symmetries of the Standard Model and permit no proton decay to analyze the…
Phenomenology of neutron-antineutron conversion
Susan Gardner, Xinshuai Yan
We consider the possibility of neutron-antineutron () conversion, in which the change of a neutron into an antineutron is mediated by an external source, as can occur in…
US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report
Marco Battaglieri, Alberto Belloni, Aaron Chou +248
This white paper summarizes the workshop "U.S. Cosmic Visions: New Ideas in Dark Matter" held at University of Maryland on March 23-25, 2017.
Dark Sectors 2016 Workshop: Community Report
Jim Alexander, Marco Battaglieri, Bertrand Echenard +201
This report, based on the Dark Sectors workshop at SLAC in April 2016, summarizes the scientific importance of searches for dark sector dark matter and forces at masses beneath the…
Particle Physics Models for the 17 MeV Anomaly in Beryllium Nuclear Decays
Jonathan L. Feng, Bartosz Fornal, Iftah Galon +4
The 6.8 anomaly in excited 8Be nuclear decays via internal pair creation is fit well by a new particle interpretation. In a previous analysis, we showed that a 17 MeV protophobi…
Protophobic Fifth Force Interpretation of the Observed Anomaly in Be Nuclear Transitions
Jonathan L. Feng, Bartosz Fornal, Iftah Galon +4
Recently a 6.8 anomaly has been reported in the opening angle and invariant mass distributions of pairs produced in nuclear transitions. The data are exp…
CPT, CP, and C transformations of fermions, and their consequences, in theories with B-L violation
Susan Gardner, Xinshuai Yan
We consider the transformation properties of fermions under the discrete symmetries CPT, CP, and C in the presence of B-L violation. We thus generalize the analysis of the known pr…
New Prospects in Fixed Target Searches for Dark Forces with the SeaQuest Experiment at Fermilab
S. Gardner, R. J. Holt, A. S. Tadepalli
An intense, 120 GeV proton beam incident on an extremely long, iron target generates enormous numbers of light-mass particles that also decay within that target. If one of these pa…
Comment on "New Limits on Intrinsic Charm in the Nucleon from Global Analysis of Parton Distributions"
S. J. Brodsky, S. Gardner
A Comment on the Letter by P. Jimenez-Delgado, T.J. Hobbs, J.T. Londergan, and W. Melnitchouk, Phys. Rev. Lett. 114, 082002 (2015).
Trapping Penguins with Entangled B Mesons
Ryan Dadisman, Susan Gardner, Xinshuai Yan
The first direct observation of time-reversal (T) violation in the system has been reported by the BaBar collaboration, employing the method of Bauls a…
Phenomenology of - Oscillations Revisited
S. Gardner, E. Jafari
We revisit the phenomenology of - oscillations in the presence of external magnetic fields, highlighting the role of spin. We show, contrary to long-held belief, that…
QCD and strongly coupled gauge theories: challenges and perspectives
N. Brambilla, S. Eidelman, P. Foka +46
We highlight the progress, current status, and open challenges of QCD-driven physics, in theory and in experiment. We discuss how the strong interaction is intimately connected to…
An overview of neV probes of PeV scale physics --- and of what's in between
Susan Gardner, Brad Plaster
Low-energy experiments which would identify departures from the Standard Model (SM) rely either on the unexpected observation of symmetry breaking, such as of CP or B, or on an obs…
Beta Decays and Non-Standard Interactions in the LHC Era
Vincenzo Cirigliano, Susan Gardner, Barry Holstein
We consider the role of precision measurements of beta decays and light meson semi-leptonic decays in probing physics beyond the Standard Model in the LHC era. We describe all low-…