scholarly journals The Muon g − 2 experiment at Fermilab

2019 ◽  
Vol 212 ◽  
pp. 05003 ◽  
Author(s):  
Alexander Keshavarzi
Keyword(s):  
Theoretical Prediction ◽  
Magnetic Anomaly ◽  
Experimental Measurement ◽  
Previous Experiment ◽  
New Physics ◽  
Statistical Uncertainty ◽  
Experimental Programme ◽  
Muon Magnetic Anomaly

The current ~ 3.5σ discrepancy between the experimental measurement and theoretical prediction of the muon magnetic anomaly, aµ, stands as a potential indication of the existence of new physics. The Muon g − 2 experiment at Fermilab is set to measure aµ with a four-fold improvement in the uncertainty with respect to previous experiment, with an aim to determine whether the g − 2 discrepancy is well established. The experiment recently completed its first physics run and a summer programme of essential upgrades, before continuing on with its experimental programme. The Run-1 data alone are expected to yield a statistical uncertainty of 350 ppb and the publication of the first result is expected in late-2019.

scholarly journals Thermo-responsive and shape-morphing CF/GF composite skin: Full-field experimental measurement, theoretical prediction, and finite element analysis

2021 ◽  
Vol 160 ◽  
pp. 106874
Author(s):  
Jamal Seyyed Monfared Zanjani ◽  
Pouya Yousefi Louyeh ◽  
Isa Emami Tabrizi ◽  
Abdulrahman Saeed Al-Nadhari ◽  
Mehmet Yildiz
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Theoretical Prediction ◽  
Experimental Measurement ◽  
Element Analysis ◽  
Full Field ◽  
Shape Morphing

scholarly journals The discrepancy between τ and e + e − spectral functions revisited and the consequences for the muon magnetic anomaly

2010 ◽  
Vol 66 (1-2) ◽  
pp. 127-136 ◽  
Author(s):  
M. Davier ◽  
A. Hoecker ◽  
G. López Castro ◽  
B. Malaescu ◽  
X. H. Mo ◽  
...  
Keyword(s):  
Magnetic Anomaly ◽  
Spectral Functions ◽  
Muon Magnetic Anomaly

Theoretical Prediction and Experimental Measurement of the Degree of Cure of Anisotropic Conductive Films (ACFs) for Chip-On-Flex (COF) Applications

2008 ◽  
Vol 37 (10) ◽  
pp. 1580-1590 ◽  
Author(s):  
Chang-Kyu Chung ◽  
Yong-Min Kwon ◽  
Il Kim ◽  
Ho-Young Son ◽  
Kyo-Sung Choo ◽  
...  
Keyword(s):  
Theoretical Prediction ◽  
Experimental Measurement ◽  
Degree Of Cure ◽  
Conductive Films

scholarly journals Impact of correlations between $$a_{\mu }$$ and $$\alpha _\text {QED}$$ on the EW fit

2021 ◽  
Vol 81 (1) ◽  
Author(s):  
Bogdan Malaescu ◽  
Matthias Schott
Keyword(s):  
Theoretical Prediction ◽  
Experimental Measurement ◽  
Mass Range ◽  
Appropriate Use ◽  
Lower Mass ◽  
Vacuum Polarisation ◽  
Theoretical Predictions ◽  
Potential Impact ◽  
Parameter Values ◽  
The Impact

AbstractWe study the potential impact on the electroweak (EW) fits due to the tensions between the current determinations of the hadronic vacuum polarisation (HVP) contributions to the anomalous magnetic moment of the muon ($$a_{\mu }$$ a μ ), based on either phenomenological dispersion integrals using measured hadronic spectra or on Lattice QCD calculations. The impact of the current tension between the experimental measurement of $$a_{\mu }$$ a μ and the total theoretical prediction based on the phenomenological calculations of the HVP is also studied. The correlations between the uncertainties of the theoretical predictions of $$a_{\mu }$$ a μ and of the running of $$\alpha _\mathrm{QED}$$ α QED are taken into account in the studies. We conclude that the impact on the EW fit can be large in improbable scenarios involving global shifts of the full HVP contribution, while it is much smaller if the shift is restricted to a lower mass range and/or if the shift in $$\alpha _\text {QED}$$ α QED is obtained from that in $$a_{\mu }$$ a μ through appropriate use of the correlations. Indeed, the latter scenarios only imply at most a 2.6/16 increase in the $$\chi ^2/\text {n.d.f.} $$ χ 2 / n.d.f. of the EW fits and relatively small changes for the resulting fit parameter values.

scholarly journals Probing new physics scenarios of muon g − 2 via J/ψ decay at BESIII

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Gorazd Cvetič ◽  
C. S. Kim ◽  
Donghun Lee ◽  
Dibyakrupa Sahoo
Keyword(s):  
Model Prediction ◽  
Magnetic Moment ◽  
Experimental Measurement ◽  
Anomalous Magnetic Moment ◽  
Numerical Study ◽  
Standard Model Prediction ◽  
Vector Boson ◽  
New Physics ◽  
Muon Anomalous Magnetic Moment ◽  
The Standard Model

Abstract The disagreement between the standard model prediction and the experimental measurement of muon anomalous magnetic moment can be alleviated by invoking an additional particle which is either a vector boson (X1) or a scalar (X0). This new particle, with the mass mX ≲ 2mμ, can be searched for in the decay J/ψ → μ−μ+X, where X is missing. Our numerical study shows that the search is quite feasible at the BESIII experiment in the parameter space allowed by muon g − 2 measurements.

scholarly journals MIRROR MATTER ADMIXTURES IN KS→γγ

2006 ◽  
Vol 21 (19n20) ◽  
pp. 4197-4207 ◽  
Author(s):  
G. SÁNCHEZ-COLÓN ◽  
A. GARCÍA
Keyword(s):  
Experimental Data ◽  
Theoretical Prediction ◽  
Mirror Symmetry ◽  
B Meson ◽  
Branching Ratio ◽  
New Physics ◽  
B Meson Decays ◽  
Mixing Angles ◽  
Meson Decays ◽  
Mirror Matter

The latest measurement of the KS→γγ branching ratio clearly shows an enhancement over the current theoretical prediction. As in other K and B meson decays, this invites to consider the possibility of the contribution of new physics. We study a particular form of the latter, which may be refered to as manifest mirror symmetry. The experimental data are described using previously determined values for the mixing angles of the admixtures of mirror matter in ordinary hadrons and by assuming that for π0, η, η′ → γγ, the mirror decay amplitudes have the same magnitudes as their ordinary counterparts.

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