Bulletin of the American Physical Society
Prairie Section Fall 2022 Meeting
Volume 67, Number 12
Thursday–Saturday, October 13–15, 2022; University of South Dakota, Sioux Falls, SD
Session E01: Parallel Session II |
Hide Abstracts |
Chair: Aswathi Balagopal V., University of Wisconsin - Madison Room: University of South Dakota Avera Lecture Hall |
Friday, October 14, 2022 2:30PM - 2:42PM |
E01.00001: A New Explanation for the Big Bang Mechanism from Creation to Explosion Gh. Saleh The formation of the Universe begins with the Big Bang phenomenon. The Big Bang is a periodic motion, like a planet that starts its movement from one point and returns to the initial point after a complete period, which we name a Cycle period (like a year). |
Friday, October 14, 2022 2:42PM - 2:54PM |
E01.00002: Calibration of VERITAS Stellar Intensity Interferometry with Vega Margaret Shepherd, David B Kieda The VERITAS-SII (Very Energetic Radiation Imaging Telescope Array System with Stellar Intensity Interferometry, or VSII) collaboration aims to measure the properties of stars, such as the angular diameter, using optical interferometric observations. In this project, the angular diameter of the star Vega and the zero-baseline normalization factor associated with the VSII instrument are estimated. Vega's angular diameter is found to be 2.40 milliarcseconds with 1-sigma errors of 0.49 mas (lower) and 0.55 mas (upper). At the 3 sigma level, the maximum angular diameter is unconstrained. Though the uncertainty is large, this estimate (specific to VERITAS' observational wavelength) is consistent with measurements at longer wavelengths. In addition, these observations are a useful test of the largest angular diameter that VERITAS can measure. Measurements of the instrumental normalization factor came from the stars alp Lyr (Vega), gam Cas, and gam Ori. The measured normalization is within the uncertainty of previously published values but itself has a large associated uncertainty, which can be decreased with observations made under good weather and further improvements to the VERITAS telescopes' hardware. |
Friday, October 14, 2022 2:54PM - 3:06PM |
E01.00003: Constraining the strange-quark vacuum condensate using SU(3) flavor symmetry-breaking Jason N Ho, Derek Harnett, Tom G Steele While the light quark vacuum condensate $langle ar{q} q angle$ is well-understood and known to good precision, the strange quark vacuum condensate $langle ar{s} s angle$ is not as well determined. Using the renormalization-group invariant strange quark mass ratio $r_m = m_s/m_q$, as well as properties of pions and kaons, we develop a simple constraint on a dimensionless PCAC deviation parameter $r_p$ and the quark condensate ratio $r_c = langle ar{s}s angle/langle ar{u}u angle$ to ensure self-consistency between the two parameters, and to tighten the bounds on $r_p$. We compare predictions in the literature against this constraint. |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700