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X-ORIGINAL-URL:https://www.ashoka.edu.in
X-WR-CALDESC:Events for Ashoka University
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TZID:Asia/Kolkata
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TZOFFSETFROM:+0530
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DTSTART:20210101T000000
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BEGIN:VEVENT
DTSTART;TZID=Asia/Kolkata:20221014T100000
DTEND;TZID=Asia/Kolkata:20221014T112000
DTSTAMP:20221007T060640Z
CREATED:20221007T042009Z
LAST-MODIFIED:20221007T060640Z
UID:35934-1665741600-1665746400@www.ashoka.edu.in
SUMMARY:3D Tomography of Hadron in the Light-front dynamics
DESCRIPTION:Abstract: One dimensional (1D) momentum space information provided by the Parton distribution function (PDF) is not sufficient and there are some experimental observations that indicate Hadron structure beyond 1D. Transverse momentum-dependent Parton distributions (TMDs) encode three-dimensional structures\, as well as angular momentum information of a hadron\, and hence\, have attracted a lot of attention in recent times. We present all the twist-2 TMDs for proton in a light-front quark-diquark model (LFQDM). The 𝑥−𝑝2⊥ factorization used in phenomenological extraction for TMDs is observed to hold in this model. We present the results for the quark densities and the transverse shape of the proton. The shape of the transversely polarized proton is shown to be non-spherical for nonzero transverse momentum.  We also calculate the more general Wigner distribution and present our recent result in the momentum space as well as in the boost invariant longitudinal space. We found that the Wigner distributions in the boost invariant space show a single slit diffraction behavior. We will also present our model result for Sivers asymmetry and give a prediction for the future electron-ion-collider(EIC) at BNL. The talk will be mostly based on my recent work Phys.Rev.D 105 (2022) 7\, 074024.  \nSpeaker Bio:Currently\, Dr. Tanmay Maji is working as a National Postdoctoral Fellow (N-PDF) at the Department of Physics at IIT Hyderabad. He received his Ph.D. from IIT Kanpur in 2018 and held postdoctoral positions at IIT Bombay and at Fudan University\, Shanghai in the last four years. The research works of Dr. Maji belong to High Energy Physics Theory and more precisely his research is focused on 3D tomography of hadrons in light-front dynamics and precision prediction to even shapes measurements in the framework of Soft-Collinear Effective Theory (SCET). Dr. Maji has been awarded the prestigious Gary McCartor award in 2018 given by Jefferson Lab\, USA\, and the Young Scientist award in 2019 given by China Postdoctoral Science Foundation\, China. 
URL:https://www.ashoka.edu.in/event/3d-tomography-of-hadron-in-the-lightfront-dynamics/
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BEGIN:VEVENT
DTSTART;TZID=Asia/Kolkata:20221014T140000
DTEND;TZID=Asia/Kolkata:20221014T150000
DTSTAMP:20221013T015752Z
CREATED:20221013T015752Z
LAST-MODIFIED:20221013T015752Z
UID:36182-1665756000-1665759600@www.ashoka.edu.in
SUMMARY:Sleep is plastic and supports plastic
DESCRIPTION:Abstract:\nSleep is near universal in animals and recognized to be plastic and influenced by ecological factors and environmental changes. Changes in sleep in turn are thought to facilitate neural plasticity and consequently\, changes in behaviour. The mechanisms that might regulate sleep-plasticity\, and the mechanisms by which sleep might support adaptive behaviour are however\, not well understood. Our recent work speaks to both of these aspects. First\, we found that manipulations that impair flight in Drosophila increase sleep as a form of sleep-plasticity. Further\, we identified a novel neural circuit that mediates this effect. This circuit consists of pheromone-sensitive sensory neurons\, their partner projection neurons\, and targets of the projection neurons in the brain.\nSecond\, we have adapted a spatial learning assay to explore the relationship between sleep and plasticity. Excitingly we find that flies exhibit age dependent declines in spatial learning that are reversed by enhancing sleep. These data reveal an unexpected role for flight in regulating sleep\, provide new insight into how sensory processing controls sleep need\, and how sleep impacts adaptive behaviour. \nAbout Speaker: \nKrishna is interested in understanding how brains generate adaptive behaviours. To get at these questions\, his lab uses a variety of techniques including genetics\, circuit tracing tools\, physiology and behavioural measurements. His current interests are in studying sleep in the fly Drosophila. His work speaks to two aspects of sleep – that sleep is plastic i.e. modifiable by environmental changes\, and in turn supports brain plasticity and learning. In so doing\, his work addresses fundamental questions around both the how and why of sleep. \nPrior to joining Ashoka\, Krishna was a Staff Scientist in the Dept of Neuroscience\, Washington University School of Medicine studying sleep in the fly Drosophila with Dr. Paul Shaw. He received a PhD from the University of Massachusetts\, Amherst studying neural development with Dr. John Nambu. From development\, he went on to first investigate the neural substrates for colour vision at the National Institutes of Health\, Bethesda\, before finding his true intellectual home in the study of sleep in flies. \n 
URL:https://www.ashoka.edu.in/event/sleep-is-plastic-and-supports-plastic/
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