89th Annual Meeting of the Southeastern Section of the APS
Volume 67, Number 18
Thursday–Saturday, November 3–5, 2022;
University of Mississippi, University, MS
Session N01: Particle Spins and Moments
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Chair: Romulus Godang, University of South Alabama
Room: University of Mississippi Ballroom A
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Saturday, November 5, 2022
8:30AM - 9:00AM
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N01.00001: Looking for Physics Beyond the Standard Model: First Results and Current Status of the Muon g-2 Experiment at Fermilab
Invited Speaker:
Laura Kelton
In the search for physics beyond the Standard Model, the Muon g − 2 Experiment at Fermilab (E989) has made the most precise measurement of the anomalous magneitc moment of the muon aμ. When combined with previous experimental results, there is a 4.2σ discrepancy with the Muon g − 2 Theory Initiative Standard Model prediction. The muon aμ is extracted from the measurement of the precession frequency of spin-polarized muons stored in a highly uniform, precisely mapped magnetic field. This talk will present the measurement and systematic errors associated with the first result from the 2018 data and will discuss the subsequent runs and continued improvements in the extraction of aμ.
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Saturday, November 5, 2022
9:00AM - 9:30AM
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N01.00002: Storage ring proton EDM experiment at 10^{-29} e.cm
On Kim
The storage ring proton EDM experiment aims to measure the electric dipole moment (EDM) of the proton at 10^{-29} e.cm, which is a three orders of magnitude improvement from the current best limit of the neutron EDM. This experiment will provide competitive sensitivity to New Physics up to 1,000 TeV. With the frozen-spin condition in a hybrid electric and magnetic storage ring, the polarization of stored protons will rotate in the vertical direction in the presence of the EDM. The known systematic error sources, such as radial magnetic field, vertical electric field, and vertical velocity effect, can be suppressed below the target sensitivity thanks to the latest symmetric lattice design. We consider this experiment ready to go and have asked for a strong endorsement from the community at the 2022 Seattle Snowmass meeting. |
Saturday, November 5, 2022
9:30AM - 10:00AM
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N01.00003: The SpinQuest Experiment: Probing the sea-quarks' Sivers asymmetry
Invited Speaker:
Ishara P Fernando
The SpinQuest experiment (E1039) at Fermilab aims to extract the Sivers functions for the light sea-quarks as part of a global effort to understand the nucleon's missing spin. SpinQuest will measure the correlation between the angular distribution of the di-muons and the spin-polarization of the nucleon through the Transverse Single Spin Asymmetry (TSSA) from the Drell-Yan (DY) process, using an unpolarized 120 GeV proton beam interacting with a solid polarized fixed target of either NH$_3$ (for proton) or ND$_3$ (for neutron). In addition to the Drell-Yan TSSA measurements, J/$psi$ TSSAs will also be measured to extract the gluon Sivers function. This presentation will discuss the current status and plans of the SpinQuest experiment, and put it into a global context. It will consider SpinQuest's unique kinematic coverage, which will serve as a bridge between probing valence-quarks and kinematics for the sea-quarks at future Electron-Ion Collider (EIC) experiments.
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