Bulletin of the American Physical Society
2021 Joint Spring Meeting of the Texas Sections of APS, AAPT and Zone 13 of the SPS
Volume 66, Number 2
Thursday–Sunday, April 8–11, 2021; Virtual
Session B07: APS: Nuclear and Particle Physics-IV |
Hide Abstracts |
Friday, April 9, 2021 6:00PM - 6:12PM |
B07.00001: Near-horizon aspects of acceleration radiation by free fall of an atom into a black hole Abhijit Chakraborty, Carlos Ordonez, Horacio Camblong A cloud of two-level atoms falling freely into a Schwarzschild black hole was recently shown to detect radiation in the Boulware vacuum using a quantum optics approach. In this model, the atoms interact with a mode of the scalar field via a dipole interaction. The relative acceleration between the field and the atom causes it to detect the radiation. The detected radiation has a thermal spectrum with a Planck factor which depends upon the frequency of the field mode. In this talk we show that the probability of detecting radiation is dominated by the conformal aspects of the near-horizon physics. The results indicate the relation of the near-horizon conformal quantum mechanics (CQM) with the spectrum of the detected thermal radiation with Hawking temperature and reinforces its relevance to all other thermodynamic properties of the black hole. Additionally, this insight about the effect of the near-horizon CQM enables us to tackle the same problem for a variety of spacetime backgrounds and general initial conditions. [Preview Abstract] |
Friday, April 9, 2021 6:12PM - 6:24PM |
B07.00002: Potential for discovery of a new dark matter WIMP at the High-Luminosity Large Hadron Collider or the Compact Linear Collider SABRINA HERNANDEZ, SPENCER ELLIS, DRUE LUBANSKI, BAILEY TALLMAN, DIEGO CRISTANCHO GUERRERO, TREVOR CROTEAU, CADEN LAFONTAINE, BRANDON TORRES, ROLAND ALLEN We propose a new dark matter WIMP, for which the best prospect for collider discovery appears to be vector boson fusion. Since this is a 4-vertex process with a small cross-section, it then also appears that detection of this particle is likely to require a new collider with greater reach than the present LHC -- either the High-Luminosity LHC or the Compact Linear Collider (CLIC). We will discuss the plans for these new colliders and how the particle proposed here can be observed, via missing transverse energy of $\sim$ 150 GeV resulting from W and Z fusion. We will also describe the very favorable features of this dark matter candidate, including consistency with the results of current direct detection experiments, indirect detection experiments, collider detection experiments, and the observed abundance of dark matter, [Preview Abstract] |
Friday, April 9, 2021 6:24PM - 6:36PM |
B07.00003: Triggers for the Light Dark Matter eXperiment Niramay Gogate The particle nature of dark matter remains a mystery to date. Scientists have proposed numerous theories about the fundamental constituents and origins of dark matter, but none have been proven experimentally. New theoretical developments have motivated "hidden sector" dark matter in the mass range of 1 MeV to 1 GeV. The Light Dark Matter Experiment (LDMX) uses an electron beam to produce dark matter in fixed-target collisions. A low current, high repetition rate electron beam, exploiting SLAC's LCLS-II upgrades, will provide LDMX with sufficient luminosity to explore thermal relic targets over most of the 1 MeV to 1GeV mass range. With a novel detector design, LDMX is expected to definitively test thermal relic targets for dark matter masses between one and several hundred MeV. The LDMX trigger system will play a crucial role in achieving these physics goals. A strategy will be presented in which scintillator-based counting detectors will provide the basis of a missing energy trigger to support the LDMX dark matter program. Preliminary work on simulations of these detectors to estimate their performance will be presented. [Preview Abstract] |
Friday, April 9, 2021 6:36PM - 6:48PM |
B07.00004: Smashing Gold on Gold: Producing and Identifying Trans-Target Multinucleon Transfer Products A. Hood, A. Abbott, J. Gauthier, K. Hagel, B. Harvey, A. Hannaman, A. Jedele, Y.-W. Lui, A. McIntosh, L. McIntosh, M. Sorensen, Z. Tobin, R. Wada, A. Wakhle, S. Yennello Multinucleon transfer (MNT) reactions may offer a way to produce new neutron-rich isotopes of known and yet-to-be discovered elements in the heavy and super-heavy mass regimes. Despite decades of study, many open questions remain about MNT reactions. For example, the mechanisms of multinucleon transfers in low-energy collisions of very heavy ions are not well understood. Experimental data are imperative to verify and refine theoretical models. We plan to use an active catcher array to study short-lived trans-target MNT products of the reaction $^{197}$Au + $^{197}$Au, with a pulsed beam. These products, which result from a transfer of $\Delta Z = 9-11$ protons and $\Delta N = 14$ neutrons, undergo three rapid $\alpha$-decays. To identify these products, we will perform a search of single digitized waveforms for correlated $\alpha$-decays of parent and daughter nuclei, thereby establishing decay chains. [Preview Abstract] |
Friday, April 9, 2021 6:48PM - 7:00PM |
B07.00005: A Concept of Neutral Rich Horn Focusing System for Low-Mass Dark Matter Search in Future Neutrino Experiments. Aayush Bhattarai Next-generation neutrino experiments like the Deep Underground Neutrino Experiment (DUNE) can also help exploring the physics Beyond the Standard Model (BSM) thanks to high intensity proton beams and capable detectors. The concept of a Neutral Rich Horn Focusing system (NRHF) makes it possible for precision neutrino experiments and beam-dump style experiments to coexist. This system helps to reduce background from neutrinos to searches of BSM particles such as low-mass dark matter, axions like particles, heavy neutral leptons, and other charge-neutral particles. The most essential component of this system is the three-dimensional sign selecting dipole that provides a magnetic kick guiding the focused charged particles towards the neutrino experiment, leaving the neutral particles on their way to the beam dump. With this system, we can enhance the signal to background ratio by several orders of magnitudes. This presentation will describe the working principles of NRHF, technical issues concerning sign selecting 3D dipole, and the resulting enhancement of the signal to background ratio dependent on the parameters of the system. [Preview Abstract] |
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