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The anomalous magnetic moments of leptons represent excellent probes of the Standard Model and therefore also of possible new physics effects. In particular, the persisting hint of new physics in the muon $g$-2 motivates the investigation…

高能物理 - 唯象学 · 物理学 2024-10-17 ZeQiang Wang

Motivated by two experimental facts, the muon g-2 anomaly and the observed Higgs boson mass around 125 GeV, we propose a simple model of anomaly mediation, which can be seen as a generalization of mixed modulus-anomaly mediation. In our…

高能物理 - 唯象学 · 物理学 2015-09-07 Debtosh Chowdhury , Norimi Yokozaki

The new experiment data of muon g-2 is reported by the workers at Fermilab National Accelerator Laboratory(FNAL). Combined with the previous Brookhaven National Laboratory(BNL) E821 result, the departure from the standard model prediction…

高能物理 - 唯象学 · 物理学 2022-04-13 Shu-Min Zhao , Lu-Hao Su , Xing-Xing Dong , Tong-Tong Wang , Tai-Fu Feng

Anomalous magnetic moment of the muon (muon g-2) is one of the most precisely measured quantities in particle physics. At the same time, it can be evaluated in the Standard Model with an unprecedented accuracy. The Muon g-2 experiment at…

高能物理 - 格点 · 物理学 2021-02-03 Marina Krstic Marinkovic , Nuno Cardoso

A non-universal $U(1)_{X}$ extension to the Standard Model composed of two scalar doublets and two scalar singlets together with three additional quark singlets and two lepton singlets and three generations of right-handed and Majorana…

高能物理 - 唯象学 · 物理学 2020-10-07 J. S. Alvarado , M. A. Bulla , D. G. Martinez , R. Martinez

The two-pion low-energy contribution to the anomalous magnetic moment of the muon, $a_\mu\equiv(g-2)_\mu/2$, expres sed as an integral over the modulus squared of the pion electromagnetic form fac tor, brings a relatively large contribution…

高能物理 - 唯象学 · 物理学 2016-07-01 B. Ananthanarayan , Irinel Caprini , Diganta Das , I. Sentitemsu Imsong

The prospects for the analysis of tau channels at the SUSY benchmark point SPS1a', especially from e+e- -> stau_1 stau_1 and e+e- -> stau_2 stau_2, have been studied in full simulation of the ILD detector concept forseen for the…

高能物理 - 实验 · 物理学 2015-03-13 Philip Bechtle , Mikael Berggren , Jenny List , Peter Schade , Olga Stempel

A precision measurement of the muon anomalous magnetic moment, $a_{\mu} = (g-2)/2$, was previously performed at BNL with a result of 2.2 - 2.7 standard deviations above the Standard Model (SM) theoretical calculations. The same experimental…

加速器物理 · 物理学 2013-01-30 C. Yoshikawa , A. Leveling , N. V. Mokhov , J. Morgan , D. Neuffer , S. Striganov

We calculate contributions to the anomalous magnetic moment of the muon from heavy neutral and charged Higgs bosons and new leptons in two Higgs doublet models extended by vectorlike leptons. We present detailed predictions of two models…

高能物理 - 唯象学 · 物理学 2021-09-29 Radovan Dermisek , Keith Hermanek , Navin McGinnis

The recent measurement of a_\mu =\frac{g_\mu -2}{2} by the E821 Collaboration at Brookhaven deviates from the quoted Standard Model (SM) central value prediction by 2.6\sigma. The difference between SM theory and experiment may be easily…

高能物理 - 唯象学 · 物理学 2009-11-07 Howard Baer , Csaba Balazs , Javier Ferrandis , Xerxes Tata

For the purpose of minimizing the number of sample model evaluations, we propose and study algorithms that utilize (sequential) versions of likelihood-to-evidence ratio neural estimation.We apply our algorithms to a supersymmetric…

高能物理 - 唯象学 · 物理学 2022-12-15 Logan Morrison , Stefano Profumo , Nolan Smyth , John Tamanas

We present a gauge mediated supersymmetry breaking model having weak SU(2) triplet, color SU(3) octet and SU(5) 5-plet messengers, that can simultaneously explain the muon $(g-2)$ data within 1$\sigma$ and the observed Higgs boson mass of…

高能物理 - 唯象学 · 物理学 2015-06-17 Gautam Bhattacharyya , Biplob Bhattacherjee , Tsutomu T. Yanagida , Norimi Yokozaki

There has been a long-standing discrepancy between the experimental measurements of the electron and muon anomalous magnetic moments and their predicted values in the Standard Model. This is particularly relevant in the case of the muon…

高能物理 - 唯象学 · 物理学 2021-09-15 Pablo Escribano , Jorge Terol-Calvo , Avelino Vicente

The status of the muon (g-2) experiment at the Brookhaven AGS is reviewed. An accuracy of 1.3 ppm on the mu^+ anomalous magnetic moment has been achieved and published. This result differs with the standard model prediction by about 2.5…

高能物理 - 实验 · 物理学 2007-05-23 B. Lee Roberts , H. N. Brown

The recent precise measurement of the $W$-mass by the CDF II collaboration is indicative of new physics beyond the Standard Model. On the other hand, a resolution of the longstanding muon $g-2$ anomaly also calls for additional dynamics. In…

高能物理 - 唯象学 · 物理学 2022-06-24 Nabarun Chakrabarty

A study of various SUSY scenarios is presented in which the lightest supersymmetric particle is the gravitino $\sG$ and the next-to-lightest supersymmetric particle is a scalar tau $\stau$ with lifetimes ranging from seconds to years.…

高能物理 - 唯象学 · 物理学 2009-01-07 H. -U. Martyn

Supersymmetry is still a viable explanation for the muon $g-2$ anomaly, if the sleptons and electroweak gauginos are $\mathcal{O}(100)$ GeV. However, for supersymmetry breaking masses this light, the SUSY flavor and CP-problem are…

高能物理 - 唯象学 · 物理学 2023-03-22 Jason L. Evans , Tsutomu T. Yanagida , Norimi Yokozaki

The supersymmetric contribution to the muon g-2 is studied in light of the finalization of the LEP electroweak precision data. The recent precise measurement of the muon g-2 of E821 experiment is explained well by the relatively light…

高能物理 - 唯象学 · 物理学 2007-05-23 Gi-Chol Cho

The 3.6 \sigma discrepancy between the predicted and measured values of the anomalous magnetic moment of positive muons can be explained by the existence of a new dark boson Z_\mu with a mass in the sub-GeV range, which is coupled…

高能物理 - 唯象学 · 物理学 2015-05-21 S. N. Gninenko , N. V. Krasnikov , V. A. Matveev

We analyze two minimal supersymmetric constrained models with low-energy vector-like matter preserving gauge coupling unification. In one we add to the MSSM spectrum a pair of 5-plets of SU(5), in the other a pair of 10-plets. We show that…

高能物理 - 唯象学 · 物理学 2017-05-23 Arghya Choudhury , Luc Darmé , Leszek Roszkowski , Enrico Maria Sessolo , Sebastian Trojanowski