Undergraduate

Astronomy & Astrophysics Colloquium: Sydney Barnes - Gyrochronology: a route to the ages of cool field stars

The ages of astronomical objects, while not directly measurable, are of use in constructing chronologies, and the key to understanding origins. The ages of cool field dwarfs, although important in a Galactic context, are especially challenging to obtain. I will present a route to the ages of such objects that is called “Gyrochronology,” one based on the measured rotation periods of such stars.

NPA Seminar: Zoltan Varga, Wigner Research Centre for Physics, "Studying the multiplicity dependence of jet properties and the role of the underlying event in pp collisions"

The Koba-Nielsen-Olesen (KNO) scaling hypothesis is an influential contribution to the analysis of event multiplicities in high-energy particle collisions, according to which the event-multiplicity distributions can be all collapsed onto a universal scaling curve. Recent phenomenological studies suggest that a similar scaling may hold within single jets, if we consider the jet multiplicity as a function of the jet transverse momentum.

NPA Seminar: Charles Baltay, Yale, "Precision Measurement of the Hubble Constant Using Type Ia Supernovae"

It has been realized recently that Type Ia supernova are the most sensitive distance indicators in measuring the Hubble Constant. Our Yale group has been collaborating with the Carnegie Observatory Group (Mark Phillips, Wendy Friedman, et al) with our La Silla/QUEST Supernova Survey providing a substantial part of the supernovae for the most recent precision measurement of the Hubble Constant. Results of this measurement will be presented and and its significance discussed.

Host: Thomas Penny

WIDG Seminar: Arianna García Caffaro, Yale, "Probing the Higgs CP Structure and Quantifying QCD Systematics in Jet Substructure Techniques"

Since the Higgs boson’s discovery in 2012, the High Energy Physics community has centered its efforts on thoroughly studying this particle’s properties. As a step towards that goal, the ATLAS Collaboration has undertaken a study of the CP nature of the Higgs Yukawa coupling to the tau lepton. A Run 2 analysis has measured the CP mixing angle to be 9 ± 16°, excluding the pure CP-odd Higgs hypothesis at 3.4σ. The next iteration of this analysis with partial Run 3 data is underway.

NPA Seminar: Jennet Dickinson, Fermilab, "Boosted Higgs boson production via vector boson fusion with the CMS experiment"

A first search is conducted for boosted Higgs boson production via vector boson fusion in the H(bb) decay channel at the LHC proton-proton collider. The result is based on the full 13 TeV dataset collected by the CMS detector in 2016, 2017, and 2018, corresponding to an integrated luminosity of 138 fb^{-1}. Jet kinematics are used to define independent regions targeting vector boson fusion (VBF) and gluon fusion (ggF) production of Higgs bosons with p_T>450 GeV.

YPPDO Seminar: Ellie Hadjiyska Schmelzer, Collins Aerospace, "Elliptical Career Paths"

Many of us expect to follow linear career paths. However, sometimes we cannot predict our growth and change, leading us to reevaluate our career trajectory. Course corrections can alter our linear paths and create parallel, perpendicular, or even elliptical career paths. In this talk, I will discuss the surprising twists and turns one may encounter when navigating their professional growth.

ACCESS: Free HPC Resources Available to Researchers

The session will provide an overview of free ACCESS resources, outline the application process for various resource allocations, as well as reporting requirements for successful applications.

If you are a graduate student, post-doc or professor experiencing restrictions via CPU hour limits, gpu access, and/or other resource-related limitations then ACCESS may be the solution for you.

Parallel Programming with Python

This workshop introduces parallel programming concepts and demonstrates their implementation with Python. We will discuss parallel concepts, classes of parallel programs, Python’s implementation of parallel workflows, and showcase several toolkits for CPU and GPU-based parallel programming in Python. Additionally, we will discuss leveraging cluster-infrastructure for large parallel work via Slurm Job Arrays.

WIDG Seminar: Sophia Hollick, Yale, "COSINE-100 and ANAIS-112 Search for WIMPs"

This prospectus carries the goal of testing the DAMA/LIBRA (DL) dark matter claim by combining two collaborations who have set forth to reproduce the DL annual modulation signature, COSINE-100 and ANAIS-112. COSINE-100’s recent modulation results support both the no modulation case and the DL modulation case. ANAIS- 112 excludes DL to 2σ. A combination of the two experiments would allow for a sensitive search from opposite sides of the world, notably, Spain and Korea.

WIDG Seminar: Mark Gonzalez, Yale, "Detectorology and its Phenomenological Applications"

Well-defined operators which are capable of describing measurements made at future null infinity in collider experiments are naturally of phenomenological interest, but they are also of great formal interest. Here we discuss the properties of these so called asymptotic detector operators, including both their formal construction in terms of light-ray operators in a conformal field theory, as well as their utility in jet substructure phenomenology.

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