Constraints on Proton Structure from Precision Atomic-Physics Measurements
نویسندگان
چکیده
Stanley J. Brodsky,1, ∗ Carl E. Carlson,2, † John R. Hiller,3, ‡ and Dae Sung Hwang4, § Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 Particle Theory Group, Physics Department, College of William and Mary, Williamsburg, VA 23187-8795 Department of Physics, University of Minnesota-Duluth, Duluth, MN 55812 Department of Physics, Sejong University, Seoul 143-747, Korea (Dated: July 22, 2005 (revised))
منابع مشابه
Comment on "constraints on proton structure from precision atomic-physics measurements".
Ground-state hyperfine splittings in hydrogen and muonium are very well measured. Their difference, after correcting for magnetic moment and reduced mass effects, is due solely to proton structure-the large QED contributions for a pointlike nucleus essentially cancel. The rescaled hyperfine difference depends on the Zemach radius, a fundamental measure of the proton, computed as an integral ove...
متن کاملLaboratory Limits on Temporal Variations of Fundamental Constants: An Update. arXiv preprint physics/0611088
Precision comparisons of different atomic frequency standards over a period of a few years can be used for a sensitive search for temporal variations of fundamental constants. We present recent frequency measurements of the 688 THz transition in the 171 Yb + ion. For this transition frequency a record over six years is now available, showing that a possible frequency drift relative to a cesium ...
متن کاملPrecision tests of QCD with jets and vector bosons at HERA and TevaTron
Recent results from HERA and TevaTron on precision tests of QCD with jets, W and Z bosons and photons associated with jets and heavy flavours are presented. The measurements were used to probe QCD at the highest energies, to provide experimental constraints on SM processes that constitute background to new physics, to extract values of the coupling of the strong interaction and to constrain the...
متن کاملPrecision muon physics
Themuon is playing a unique role in sub-atomic physics. Studies ofmuon decay both determine the overall strength and establish the chiral structure of weak interactions, as well as setting extraordinary limits on charged-lepton-flavor-violating processes. Measurements of the muon’s anomalous magnetic moment offer singular sensitivity to the completeness of the standard model and the predictions...
متن کاملSinglet-Catalyzed Electroweak Phase Transitions and Precision Higgs Studies
We update the phenomenology of gauge singlet extensions of the Standard Model scalar sector and their implications for the electroweak phase transition. Considering the introduction of one real scalar singlet to the scalar potential, we analyze present constraints on the potential parameters from Higgs coupling measurements at the Large Hadron Collider (LHC) and electroweak precision observable...
متن کامل