During the academic year, the Department hosts a weekly colloquium series which features speakers from both academia and industry. This semester (Spring 2019) the colloquia take place on Thursdays from 3:15-4:30 pm in BIOS 335. Refreshments are served at 3:15 pm and talks begin at 3:30 pm.
This week's colloquium
"Observation of Electron Antineutrino Disappearance at Daya Bay"
Dr. Harry Themann, Cal State LA
Thursday, April 25, 3:15 pm in BIOS 335
At the Daya Bay Reactor Neutrino Experiment we have measured the last unknown neutrino mixing angle, θ13, to be non-zero at minimum 6.2σ level, which is the most precise measurement to date. This was done using a careful optimization of the detector systems, the measurement technique and choice of experimental site. I will give a short introduction to neutrinos, what we know about them and how we know these things. I will then talk of the mathematical formalism of neutrino mixing and how we might measure the parameters of mixing. At Daya Bay we use the technique of far/near relative measurement to make a significant reduction of the systematic errors that have been a problem for previous measurements. I will describe this technique and how this drove the design of the hardware of our experiment. Lastly I will describe the backgrounds to our measurement and how they are dealt with and then, of course, the final result. If there is time I hope to discuss the implication of our measurement and what’s in store for neutrino physics.
May 2: Dr. Renyu Hu, JPL
Previous colloquia (2018-19)
Apr. 18: Dr. Seyda Ipek, UC Irvine, "Why Are We Here? Matter–Antimatter Asymmetry of the Universe"
Apr. 11: Prof. Pete Kekenes-Huskey, Univ. of Kentucky, "Molecular simulations of diffusion in nanoporous media"
Mar. 21: Prof. Andreas Bill, CSU Long Beach, "Quantum States of Superconducting-Magnetic Proximity Systems and Josephson Junctions"
Mar. 14: Prof. Nick Graham, USC, "Systems biology approaches to decode cellular behaviors"
Feb. 28: Prof. Roya Zandi, UC Riverside, "Principles for designing protein nanocages"
Feb. 21: Dr. Davide Gerosa, Caltech, "Understanding the birth and growth of binary black holes using gravitational waves"
Feb. 14: Prof. Hai-Bo Yu, UC Riverside, "Hunting for Dark Matter"
Feb. 7: Dr. Daniel Silevtich, Caltech, "Taming Disorder: Statics and Dynamics in a Realization of the Random Field Ising Model"
Jan. 31: Dr. Simon Birrer, UCLA, "Probing Dark Matter with Gravitational Lensing"
Nov. 29: Prof. Marco Bernardi, Caltech, "Advances in Computing Charge Carrier Dynamics in Materials from First Principles"
Nov. 15: Prof. Olaseni Sode, Cal State LA, "Exploring the electronic and vibrational structure of carbon dioxide"
Nov. 8: Prof. Zhongbo Kang, UCLA, "Quantum tomography of a proton"
Nov. 1: Prof. Ximin He, UCLA, "Bioinspired Dynamic Material Systems based on Smart Hydrogels: Sensing, Sorting, and Harvesting"
Oct. 25: Dr. Coral Wheeler, Caltech, "Be it therefore resolved: simulating dwarf galaxies at the high resolution limit"
Oct. 18: Prof. Breanna Binder, Cal Poly Pomona, "SN2010da: From Supernova Impostor to Ultraluminous X-ray Source"
Oct. 11: Prof. Anna Bezryadina, CSU Northridge, "Optical trapping and manipulation of bacteria"
Oct. 4: Prof. Wylie Ahmed, CSU Fullerton, "Active mechanics and forces that keep our cells alive"
Sept. 27: Prof. Eli Levenson-Falk, USC, "Fleas on Schrödinger's Cat: Decoherence in Superconducting Quantum Circuits"
Sept. 20: Arabi Seshappan, Cal State LA, "CeBOx (B=La, Mn, Co, Fe) as potential catalysts for thermochemical water splitting reactions"
Sept. 13: Marc Ong, Cal State LA, "Applications of machine learning in physics and chemistry"
Sept. 6: Prof. Peter Zhao, Cal State LA, "Polaronic high-temperature superconductivity in cuprates, bismuthates, and pnictides"
Previous colloquia (2017-18)
May 3: Prof. Christoph Haselwandter, USC, "Collective phenomena in cell membranes"
April 26: Dr. Yuval Baum, Caltech, "Current at a distance and resonant transparency in Weyl semimetals"
April 19: Prof. Jayakanth Ravichandran, USC, "Shining Light on Perovskite Chalcogenides: Semiconductors for Visible to Infrared Optoelectronics"
This list will be rebuilt shortly! (We had a little accident...)