[Jlab-seminars] Today's Virtual Physics Lunch Seminar: Holly Szumila-Vance; Ruling out Color Transparency in quasi-elastic 12C(e,e’p) up to Q2 = 14 (GeV/c)2

[Stephanie Tysor]

Virtual Physics Division Lunch Seminar

Holly Szumila-Vance

Jefferson Lab



Ruling out Color Transparency in quasi-elastic 12C(e,e’p) up to Q2 = 14 (GeV/c)2


Abstract:



Color transparency (CT) is a fundamental phenomenon of QCD postulating that at high momentum transfer, one can preferentially measure hadrons that fluctuate to a small color neutral transverse size in the nucleus, and final state interactions within the nuclear medium are suppressed. This talk will discuss the recent quasi-elastic 12C(e, e’p) scattering measurement in Hall C at momentum transfer squared Q2 = 8, 9.4,11.4, and 14.2 (GeV/c)2, the highest ever achieved to date. Nuclear transparency for this reaction was extracted by comparing the measured yield to that expected from a plane-wave impulse approximation calculation without any final state interactions. The measured transparency was observed to be independent of Q2, up to momentum scales where earlier A(p, 2p) results had indicated a rise in transparency, ruling out the quantum chromodynamics effect of color transparency at such momentum scales. These new results impose strict constraints on models of color transparency for protons.


Friday, October 9, 2020
12:00pm

https://bluejeans.com/245615984





Upcoming Seminars:

Friday, Nov. 13:  Camillo Mariani (VT)  Argon (e,e’p) Results



Stephanie Tysor
Hall A/C Administrative Assistant
Physics Division
Jefferson Lab
757-269-6005


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