Bulletin of the American Physical Society
APS April Meeting 2023
Volume 68, Number 6
Minneapolis, Minnesota (Apr 15-18)
Virtual (Apr 24-26); Time Zone: Central Time
Session UU03: V: General Physics II |
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Chair: Robert Pattie, East Tennessee State University Room: Virtual Room 3 |
Tuesday, April 25, 2023 6:00PM - 6:12PM |
UU03.00001: Search for CPT and Lorentz Invariance Violation in the Muon g-2 Experiment. Baisakhi Mitra, On Kim, Breese Quinn, Byungchul Yu Muon g-2 data can be used to search for a sidereal variation of the anomalous muon spin precession rate, which is one of the important potential signatures of CPT and Lorentz Invariance Violation in the muon sector. The talk will focus on the analysis framework that has been used to study sidereal variation of this precession rate in Muon g-2 preliminary Run 2 data. This will include a brief introduction to the signal blinding method, which will be used on the entire Run 2/3/4/5 dataset. |
Tuesday, April 25, 2023 6:12PM - 6:24PM |
UU03.00002: Levitated Nanospheres for Submicron Gravity Tests in Cryogenic EHV Environment Alexey Grinin Levitated Nanospheres for Submicron Gravity Tests in a Cryogenic EHV Environment |
Tuesday, April 25, 2023 6:24PM - 6:36PM |
UU03.00003: Interface Engineering of the High-Efficiency Perovskite Solar Cells with Triphenylene Discotic Liquid Crystals Qurat Ul Ain, Imanah Rafieh alwani, Ammar Ahmed Khan, Jianxing Xia Herein, we incorporated Hexa-alkoxy triphenylene (HAT6)-based Discotic Liquid Crystals(DLCs) for the interfacial engineering of the Perovskite Solar cell (PSC). Experimental studies demonstrate that a discotic liquid crystal interface formation between the perovskite and a hygroscopic hole transporter Spiro-OMeTAD can make the device more stable and efficient. Surface anchoring of the perovskite with the DLCs slower the degradation mechanism of the devices and inhibits the lead iodide formation. Different concentration of HAT6 was used for interfacial layer formation. Devices with liquid Crystal interfaces with a lower thickness (40nm) provide higher power conversion efficiency, up to 19%. The reference devices gave an efficiency value up to 17%. HAT6-incorporated device layers proved better hydrophobicity and PL quenching than reference devices. The incident photon-to-electron ratio was significantly improved due to less recombination at the Perovskite-Spiro-OMeTAD interface. Overall, the results illustrate the DLC materials among the potential candidates for providing stable and efficient perovskite photovoltaics. |
Tuesday, April 25, 2023 6:36PM - 6:48PM |
UU03.00004: Fostering teaching competency in STEM education for natural science students at universities of pedagogy in Vietnam Tuan M Dang, Chung K Pham, Hung V Mai Abstract: This research focuses on determining the STEM educational competency of final year students majoring in natural science at universities of pedagogy in Vietnam, thereby developing this important competency building program for students before graduating to become science school teachers. Questionnaire surveys and in-depth interviews were conduct among 4th year natural science students at different pedagogical schools in Vietnam. The results reveal that final year students have an average STEM education competency. Despite the implementation of STEM education-related modules in the natural science curriculum, some key component competencies were found to be below average. The research also demonstrates that the lack of STEM education competency to meet the implementation of the natural program is not only related to the content of the training program but also closely linked to the method and form as well as organize this competency training for students. Finally, the research proposes the program content and methods of fostering technology-based STEM educational competency for last-year students in natural science so that they gain the competence to carry out STEM educational activities for secondary pupils before graduation to become a professional middle school teacher. |
Tuesday, April 25, 2023 6:48PM - 7:00PM |
UU03.00005: Light Sterile Neutrinos, Left-Right Symmetry, and 0νββ Decay Juan Carlos Vasquez Carmona We investigate neutrinoless double beta (0νββ) decay rates in minimal left-right symmetric models in the presence of relatively light right-handed neutrinos. Using an effective field theory approach, we systematically include all contributions in the model as well as the dependence of the decay amplitude on the masses of right-handed neutrinos. In type-I and type-II seesaw scenarios, we analyze the impact of right-handed neutrinos heavier than about 10 MeV, showing that this effect can lead to a detection of 0νββ decay in the next-generation experiments even for the normal hierarchy and a relatively large right-handed scale set by the mass of hypothetical right-handed gauge bosons. Finally, we comment on a possible connection between light right-handed neutrinos and the strong CP problem. |
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