Recent Publications (2024)

Double-Higgs Production,” Loukas Gouskos, Katharine J.C. Leney, Annual Reviews

FarView: An in-situ manufactured lunar far side radio array concept for 21-cm Dark Ages cosmology,” Polidan, R….Jonathan C Pober, et al, Advances in Space Research

21cmSense v2: A modular, open-source 21 cm sensitivity calculator,” Steven G Murray, Jonathan C Pober, Matthew Kolopanis, JOSS

pyradiosky: A Python package for Radio Sky Models,” Bryna Hazelton…Jonathan C Pober, et al, JOSS

Analysis of Systematics in the Epoch of Reionization Data from MWA Phase II with Delay Spectrum,” Shi, Ruijie, Pober, Jonathan, Bulletin of the American Astronomical Society, Vol. 56, No. 2

Focus topics for the ECFA study on Higgs / Top / EW factories,” de Blas, J….L. Gouskos, et al, arXiv

A Field Guide to Event-Shape Observables Using Optimal Transport,” C. Cesarotti & M. LeBlanc, arXiv

Les Houches 2023: Physics at TeV Colliders: Standard Model Working Group Report,” Andersen, J….M. LeBlanc, et al, arXiv

Measurements of Lund subjet multiplicities in 13 TeV proton-proton collisions with the ATLAS detector,” ATLAS Collaboration, M. LeBlanc, arXiv

Measurements of jet cross-section ratios in 13 TeV proton–proton collisions with ATLAS,” ATLAS Collaboration, M. LeBlanc, arXiv

A precise measurement of the jet energy scale derived from single-particle measurements and in situ techniques in proton-proton collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector,” ATLAS Collaboration, M. LeBlanc, arXiv

Search for heavy neutral leptons in final states with electrons, muons, and hadronically decaying tau leptons in proton-proton collisions at √s= 13 TeV,” The CMS Collaboration, Hayrapetyan, A., U. Heintz, et al, arXiv

Observation of the J/ψ→μ+μ−μ+μ− decay in proton-proton collisions at √s= 13 TeV,” The CMS Collaboration, Hayrapetyan, A., U. Heintz, et al, arXiv

Studies of dijet pseudorapidity distributions and transverse momentum balance in pPb collisions at $\sqrt {s_ {NN}} $= 5.02 TeV,” Chatrchyan, S….U.Heintz, et al, arXiv

Search for Higgs boson pair production in the b¯¯¯bW+W− decay mode in proton-proton collisions at √s= 13 TeV,” The CMS Collaboration, Hayrapetyan, A., U. Heintz, et al, arXiv

Search for ZZ and ZH production in the b¯bb¯b final state using proton-proton collisions at √s= 13 TeV,” The CMS Collaboration, Hayrapetyan, A., U. Heintz, et al, arXiv

Search for pair production of scalar and vector leptoquarks decaying to muons and bottom quarks in proton-proton collisions at √s= 13 TeV,” The CMS Collaboration, Hayrapetyan, A., U. Heintz, et al, arXiv

A novel internship program in HEP,” Santanu Banerjee, Tulika Bose, Ulrich Heintz, Sudhir Malik, arXiv

Test of lepton flavor universality in B±→K±μ+μ− and B±→K±e+e− decays in proton-proton collisions at √s= 13 TeV,” The CMS Collaboration, Hayrapetyan, A., U. Heintz, et alarXiv

Muon collider forum report,” KM Black…J.Fan, et al. JINST 19

LoVoCCS — II. Weak Lensing Mass Distributions, Red-Sequence Galaxy Distributions, and Their Alignment with the Brightest Cluster Galaxy in 58 Nearby X-ray-Luminous Galaxy Clusters,” Shenming Fu…Ian Dell’Antonio, et al, arXiv

The Non-triviality of Dynamical Chern-Simons Gravity and the Standard Model,” Stephon Alexander, Cyril Creque-Sarbinowski, Heliudson Bernardo, arXiv

“The Field Theory Axiverse,” Stephon Alexander, Tucker Manton, Evan McDonough, arXiv

What can galaxy shapes tell us about physics beyond the standard model?Oliver H. E. Philcox, Morgane J. König, Stephon Alexander, and David N. Spergel, Phys. Rev. D 109, 063541

The Kalb-Ramond field and Gravitational Parity Violation,” Stephon Alexander, Tucker Manton, arXiv

“Spacetime geometry of acoustics and electromagnetism,” Stephon Alexander, Lucas Burns, Tatsuya Daniel, Justin Dressel, Quantum Studies

“Constraints On Covariant WIMP-Nucleon Effective Field Theory Interactions from the First Science Run of the LUX-ZEPLIN Experiment,” J. Aalbers…R.J. Gaitskell, et al, arXiv

“New constraints on ultraheavy dark matter from the LZ experiment,” J. Aalbers…R.J. Gaitskell, et al, arXiv

“Search for new physics in low-energy electron recoils from the first LZ exposure,” J. Aalbers…R.J. Gaitskell, et al, PhysRevD

Recent Publications (June 2023)

Observation of electroweak W+W- pair production in association with two jets in proton-proton collisions at √s = 13 TeV,” A. Tumasyan…U. Heintz, et al, Phys.Lett.B 841 (2023)

Optimizing Roman’s High Latitude Wide Area Survey for Low Surface Brightness Astronomy,” Mireia Montes…Ian Dell’Antonio, et al, arXiv:2306.09414

Higgs Inflation and the Electroweak Gauge Sector,” Stephon Alexander, Cyril Creque-Sarbinowski, Humberto Gilmer, Katherine Freese, arXiv: 2306.04671

Spacetime geometry of acoustics and electromagnetism,” Lucas Burns, Stephon Alexander, Tatsuya Daniel, Justin Dressel, arXiv: 2305.11448

Recent publications (May 2023)

Nuclear recoil response of liquid xenon and its impact on solar 8B neutrino and dark matter searches,” X. Xiang…R. Gaitskell, et al, arxiv: 2304.06142v1

Black hole Superradiance in Dynamical Chern-Simons Gravity,” Stephon Alexander, Gregory Gabadadze, Leah Jenks, Nicolás Yunes, arxiv: 2201.02220

The π-axion and π-axiverse of dark QCD,” Stephon Alexander, Humberto Gilmer, Evan McDonough,Tucker Manton, arxiv: 2304.11176

Emergent Gravity from the Entanglement Structure in Group Field Theory,” Stephon Alexander, Jinglong Liu, Antonino Marciano, Roman Pasechnik, arxiv: 2304.10865

Size and Spectroscopic Evolution of HectoMAP Quiescent Galaxies,” Ivana Damjanov, Jubee Sohn, Margaret J. Geller, Yousuke Utsumi and Ian Dell’Antonio, The Astrophysical Journal, vol. 943 (2023)

Strange hadron collectivity in pPb and PbPb collisions,” The CMS Collaboration, A. Tumasyan…U. Heintz, et al, JHEP 05 (2023)

H0 and S8 tensions necessitate early and late time changes to ΛCDM,” Steven J. Clark, Kyriakos Vattis, JiJi Fan, and Savvas M. Koushiappas, Phys. Rev. D 107 (2023)

New EoR power spectrum limits from MWA Phase II using the delay spectrum method and novel systematic rejection,” Matthew Kolopanis, Jonathan C Pober, Daniel C Jacobs, Samantha McGraw, Monthly Notices of the Royal Astronomical Society, Volume 521, Issue 4

Recent Publications (Dec 2020)

Strongly-Interacting Ultralight Millicharged Particle (STUMP) Neutron Stars as Dark Matter Halos

BTPC/CFPU affiliated faculty member Stephon Alexander along with former BTPC affiliated postdoc Evan McDonough and David Spergel put forth a model of ultra-light fermionic dark matter, “STUMP dark matter.” This model shows consistency with observations of dwarf galaxies and can be distinguished from ultra-light boson dark matter through direct detection and collider signals.

Spectroscopic Tomography: A First Weak-lensing Detection Using Spectroscopic Redshifts Only

The distortion of the shape of galaxies depends on the relative distances of the lens and the galaxy whose light is distorted. If the distances are uncertain, the reconstruction of the lensing mass is complicated. In this pilot study, CFPU faculty Ian Dell’Antonio (working with colleagues at the Smithsonian Astrophysical Observatory, NASA JPL and Stony Brook) showed that the combination of a deep redshift survey and accurate lensing measurements can provide a measure of the cluster mass even using a smaller number of galaxies. In addition, they showed that increasing the number of galaxies with known distances makes it possible to measure the expansion history of the Universe directly from the amplitude of the lensing signal as a function of redshift.

Constraints on Axions from Cosmic Distance Measurements

Postdoc Manuel Buen-Abad, Chen Sun (Tel Aviv) and Prof. Fan use different combinations of the most updated distance measurements to constrain the axion-photon coupling. The derived strong bounds are comparable to or stronger than the existing bounds in the literature. The bounds are determined by the shape of Hubble rate as a function of redshift reconstructable from various distance measurements, and insensitive to today’s Hubble rate, of which there is a tension between early and late cosmological measurements.

Accurate background modeling provides the key to unambiguously detecting dark matter

The LUX-ZEPLIN (LZ) collaboration has developed a customized Monte Carlo simulation framework to model how the LZ detector responds to various types of signals. This framework will allow scientists to unambiguously either constrain or discover dark matter in the upcoming LZ search by allowing comparison between generated mock data from simulation and actual detector data.

A novel machine learning technique to mitigate backgrounds in xenon-based dark matter detectors

The LUX collaboration has developed a boosted decision tree machine learning algorithm to classify events in the LUX detector based on their signal shapes. This novel technique effectively mitigates backgrounds originating from the electrodes, and has improved the sensitivity of low-mass dark matter searches for experiments using liquid xenon as the target.

Radioactivity assays play important role controlling and modelling dominant dark matter detector background

The LUX-ZEPLIN (LZ) collaboration performed an extensive radioassay campaign over a period of six years to ensure a highly radiopure detector. The assay results not only help establish a Radon background model (one of the dominant backgrounds in the LZ detector), but will also help future scientists select and model clean materials for the next generation of dark matter detection experiments.

The impact of tandem redundant/sky-based calibration in MWA Phase II data analysis

Brown master’s student Zheng Zhang and CFPU affiliated faculty member Prof. Pober led a study of new calibration techniques for precisely characterizing the response of the Murchison Widefield Array (MWA) radio telescope. A calibration technique based on redundancy in the layout of the array’s antennas has attracted a lot of attention in the past few years, with studies conflicted about how useful the approach is. We find that redundant calibration can lead to statistically significant improvements in our analysis when our model for the radio sky is poor, but is limited in its efficacy when accurate sky models are available.