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Qweak: First Direct Measurement of the Proton’s Weak Charge
- Source :
- EPJ Web of Conferences, Vol 137, p 08005 (2017)
- Publication Year :
- 2017
- Publisher :
- EDP Sciences, 2017.
-
Abstract
- The Q weak experiment, which took data at Jefferson Lab in the period 2010 - 2012, will precisely determine the weak charge of the proton by measuring the parity-violating asymmetry in elastic e-p scattering at 1.1 GeV using a longitudinally polarized electron beam and a liquid hydrogen target at a low momentum transfer of Q 2 = 0.025 (GeV/c)2 . The weak charge of the proton is predicted by the Standard Model and any significant deviation would indicate physics beyond the Standard Model. The technical challenges and experimental apparatus for measuring the weak charge of the proton will be discussed, as well as the method of extracting the weak charge of the proton. The results from a small subset of the data, that has been published, will also be presented. Furthermore an update will be given of the current status of the data analysis.
- Subjects :
- Physics
Particle physics
Proton
010308 nuclear & particles physics
QC1-999
media_common.quotation_subject
Hadron
Charge (physics)
Elementary particle
7. Clean energy
01 natural sciences
Asymmetry
Standard Model
Nuclear physics
0103 physical sciences
Physics::Accelerator Physics
Grand Unified Theory
Nuclear Experiment
010306 general physics
Nucleon
media_common
Subjects
Details
- ISSN :
- 2100014X
- Volume :
- 137
- Database :
- OpenAIRE
- Journal :
- EPJ Web of Conferences
- Accession number :
- edsair.doi.dedup.....2a6bb54e0e698905a7bf2b1fcf8522db