The CFPU welcomes Dr. Shawn Dubey, who will begin his term as Postdoctoral Research Associate at Brown in September. Dr. Dubey writes, “My research is primarily in particle physics. I study the application of various AI and machine learning methods to search for new physics and rare events in particle physics data. My current focus is on using machine learning for anomaly detection. I previously worked on the Belle experiment, where I searched for rare decays at the Υ(5S) resonance, and the Belle II experiment, where I helped validate the electronics for Belle II’s Cherenkov imaging time-of-propagation (iTOP) sub-detector.” Welcome, Dr. Dubey!
Category: CFPU
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
The CFPU welcomes Dr. Madhurima Choudhury
The CFPU welcomes Dr. Madhurima Choudhury, who will begin her term as Postdoctoral Research Associate at Brown in October.
Dr. Choudhury writes, “My research focuses on cosmology, particularly on the 21cm line of neutral Hydrogen. I work on applying machine learning techniques to extract the faint 21cm signal and develop parameter inference methods. A significant part of my research is centered around studying the Epoch of Reionization (EoR), a crucial phase in the Universe’s history when the primordial neutral hydrogen was ionized by early stars and galaxies. My primary interests are, exploring various aspects of the HI 21cm signal, interpreting observations, and developing strategies for detecting the EoR HI signal. My contributions aim to enhance our understanding of this pivotal era and its impact on the evolution of galaxies.” Welcome, Dr. Choudhury!
Recent Publications (Jan 2021)
A generalized Hartle-Hawking wavefunction
Postdoctoral associate Gabriel Herczeg, together with Professor Alexander (BTPC/CFPU affiliated faculty member) and João Maguiejo (Imperial College, London) study the quantum mechanics of anisotropic cosmological models and black holes using a new proposal for a generalization of the Hartle-Hawking “wavefunction of the universe.”