[Sbs] Fwd: [EXTERNAL] Fw: UVA Physics Department Seminars for the week of 9/30/24 -10/04/24

[Arun Tadepalli]

Hello all,

Please find zoom information on Andrew’s UVA colloquium in the forwarded message.

Arun


Begin forwarded message:

From: "Liyanage, Nilanga K (nl8n)" <nl8n at virginia.edu>
Date: October 3, 2024 at 2:50:31 PM EDT
To: Arun Tadepalli <arunts at jlab.org>
Subject: [EXTERNAL] Fw: UVA Physics Department Seminars for the week of 9/30/24 -10/04/24




________________________________
From: phys-seminars-request at virginia.edu <phys-seminars-request at virginia.edu> on behalf of Bledsoe, Avery A (ptt3vn) <ptt3vn at virginia.edu>
Sent: Monday, September 30, 2024 9:12 AM
To: phys-seminars at virginia.edu <phys-seminars at virginia.edu>
Subject: [[phys-seminars]] UVA Physics Department Seminars for the week of 9/30/24 -10/04/24

[UVA Physics SeminarsColoquium.png]
"Precision studies of nucleon structure at the sub-femtoscale: the Super BigBite Spectrometer and its Physics Program"<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.phys.virginia.edu_Announcements_talk-2Dlist.asp-3FSELECT-3DSID-3A4649&d=DwMF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=jDcfcMtO-0JpottLKfE-ew&m=TZVviik5nljlSSonF2FHSksXh9OxbiBlFhMPbBV_1jj9oE5fVUMeIRg6eeBZgMA8&s=gyNqSCohjYyWVPCMfzlf7ZhfhF3wtRxPggU7DWEygrU&e=>

Andrew Puckett , University of Connecticut
[Host: Nilanga Liyanage]
ABSTRACT:
Electron scattering has been a tool of choice for the precision study of nucleon and nuclear structure since the pioneering, Nobel Prize-winning investigations by Robert Hofstadter and collaborators at Stanford during the 1950s. Over the ensuing decades, as accelerator capabilities increased, such experiments generated a wealth of knowledge of the rich and complicated structure of nucleons and nuclei, answering many questions and raising many more. Owing largely to the understanding gained from electron scattering, nucleons are now understood to consist of elementary quarks and gluons confined by strong interactions, described within the Standard Model by Quantum Chromodynamics (QCD). The Continuous Electron Beam Accelerator Facility at Jefferson Lab (JLab), with its medium energy, its unrivaled intensity, duty cycle and polarization performance, and its four experimental halls with complementary target and detector capabilities, is uniquely suited to the investigation of strong interaction physics at the luminosity frontier. Among the most famous results in the history of JLab is the surprising discovery of the rapid decrease with four-momentum-transfer Q2 of the proton’s electromagnetic form factor ratio G p E /Gp M using the polarization transfer method. These measurements upended long-held notions about the proton’s internal structure, revealed the importance of quark orbital angular momentum in understanding the origins of the proton’s spin, and exposed the limits of applicability of the one-photon-exchange approximation in the interpretation of electron scattering data. The technical challenges involved in extending the Q2 reach and precision of these measurements motivated the development of medium-acceptance, open-geometry spectrometers capable of precision charged-particle tracking in an environment of extremely high luminosity and background rate. The detector capabilities required to measure the proton form factor ratio at very large Q2 enable a large, ambitious physics program including high-Q2 proton and neutron form factor measurements, single-spin asymmetries in semi-inclusive deep inelastic scattering, measurements of the pion structure function using tagged deep inelastic scattering, and more. The collection of apparatus developed to carry out this ambitious program is collectively referred to as the Super BigBite Spectrometer (SBS). After 14 years of development, the SBS program started in JLab’s Hall A in 2021. Three major experiments measuring neutron form factors at large Q2 have already been completed, while the “flagship” measurement of G p E /Gp M is scheduled to run in 2025. In this colloquium, I will give an overview of the SBS apparatus, science program, and technical achievements, the data analysis status of completed experiments, and the outlook for completing the remaining approved physics program. Time permitting, I will also discuss some potential future opportunities taking advantage of the unique capabilities of SBS.
Colloquium
Friday, October 4, 2024
3:30 PM
Physics, Room 338
Zoom Link:  https://web.phys.virginia.edu/Private/Covid-19/colloquium.asp<https://urldefense.proofpoint.com/v2/url?u=https-3A__web.phys.virginia.edu_Private_Covid-2D19_colloquium.asp&d=DwMF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=jDcfcMtO-0JpottLKfE-ew&m=TZVviik5nljlSSonF2FHSksXh9OxbiBlFhMPbBV_1jj9oE5fVUMeIRg6eeBZgMA8&s=o7jpgZ8scC145jmej-o64z6JYPZM3shmFTL3Fi7_rR4&e=>




sent by:
Avery Bledsoe, MAT (she/they)
Administrative Coordinator
UVA Physics Department
Office:  Room 103c, Physics Bldg
Phone:   (434)924-3782
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