Probing magnetic moment operators in 
					
	    
	    
	   production and 
					
	    
	    
	   rare decay *

Cao, Qing-Hong; Jiang, H.; Li, Bin; Liu, Yandong; Zeng, Guojin

doi:10.1088/1674-1137/ac0e88

Cited by 5 publications

(2 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the 3 TeV electron collider (CLIC), the precision is estimated to be able to reach |a τ | ≈ 3 × 10 −3 with 2000 fb −1 of data, through the γγ and eγ collisions [27]. Studies have also been performed at the HL-LHC through Hγ productions and Higgs rare decay into τ τ γ [28], where the projected sensitivity is evaluated in the framework of effective field theory and can extend the LEP searches to a large extent. Similar studies have also been done at the muon colliders [29,30].…”

Section: Anomalous Magnetic Momentummentioning

confidence: 99%

Boosted tau lepton as a microscope and macroscope

Qian¹,

Guan²,

Deng³

et al. 2022

Preprint

View full text Add to dashboard Cite

Anomalies from the LHCb lepton flavour universality and Fermilab muon anomalous magnetic momentum, show tantalizing hints of possible new physics from the lepton sectors. Due to its large mass and shorter lifetime than muon, the tau lepton is believed to couple more to possible new physics beyond the standard model. Traditionally, tau leptons are probed through the decay products due to tau's short life time. On the other hand, at a high energy scale, a large fraction of tau leptons could be boosted to a much longer life time and fly a visible distance from several centimetres up to kilometer length scale, yet very informative to new physics beyond the standard model or high energy cosmic rays. In this article, we show unique yet promising tau physics by exploiting long-lived taus as a microscope or macroscope, to measure tau's anomalous magnetic momentum to an unprecedented level of accuracy and detect high energy cosmic neutrinos at the 1 TeV to 1 PeV scale, respectively.INTRODUCTION.

show abstract

Section: Anomalous Magnetic Momentummentioning

confidence: 99%

Boosted tau lepton as a microscope and macroscope

Qian¹,

Guan²,

Deng³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…At the proposed 3-TeV Compact Linear Collider (CLIC), the precision is estimated to be able to reach ja τ j ≈ 3 × 10 −3 with 2000 fb −1 of data, through the γγ and eγ collisions [28]. Studies have also been performed at the HL-LHC through Hγ productions and the Higgs rare decay into ττγ [29], where the projected sensitivity is evaluated in the framework of effective field theory and can extend the LEP searches to a large extent. Similar studies have also been done at the muon colliders [30,31].…”

Section: Anomalous Magnetic Momentmentioning

confidence: 99%

Boosted Tau Lepton as a Microscope and Macroscope

Qian

Guan

Deng

et al. 2022

Advances in High Energy Physics

View full text Add to dashboard Cite

Anomalies from the LHCb lepton flavour universality and Fermilab muon anomalous magnetic moment show tantalizing hints of possible new physics from the lepton sectors. Due to its large mass and shorter lifetime than muon, the tau lepton is believed to couple more to possible new physics beyond the Standard Model. Traditionally, tau leptons are probed through their decay products due to tau’s short lifetime. On the other hand, at a high energy scale, a large fraction of tau leptons could be boosted to a much longer lifetime and fly a visible distance from several centimetres up to kilometer length scale yet very informative to new physics beyond the standard model or high energy cosmic rays. In this article, we investigate rare, yet promising, tau-physics phenomena, where long-lived taus are exploited either as a microscope (for the measurement of tau’s anomalous magnetic moment to an unprecedented level of accuracy) or as a macroscope (for the detection of 1 TeV to 1 PeV cosmic neutrinos).

show abstract

Exploring Higgs-photon production at the LHC

Biswas

Datta

2023

J. High Energ. Phys.

View full text Add to dashboard Cite

We have investigated the signal for physics beyond the Standard Model via Higgs plus photon final state, hitherto unobserved at the LHC, in the framework of Standard Model Effective Field Theory. Using the relevant dimension-6 operators, we probe two distinct classes of interactions, based on the Lorentz structure of Higgs couplings to gauge bosons and fermions. To begin with, constraints on the Wilson coefficients of these operators have been derived from existing experimental data. We then focus on the hadronic decay of the Higgs boson to two bottom quarks in the boosted regime, leading to a high pT fat-jet recoiling against a hard photon. Following a CMS Run II search for a heavy resonance decaying into a Higgs boson and a photon, a detailed signal and background analysis for this channel has been done and limits on the relevant Wilson coefficients have been obtained. By performing a cut-based analysis, we identify some kinematic observables that distinguish between signal and SM background. Minimum values of the Wilson coefficients that will yield 3σ signal significance at the 14 TeV run of the LHC with 3000 fb−1 data, have been obtained. A multivariate analysis using a boosted decision tree and exploiting the jet substructure techniques further help to isolate the regions of phase space where the contribution of SMEFT driven signal is significantly enhanced. Finally, we briefly discuss the parameter dependencies and interpretations of the allowed values of the coefficients on a particularly interesting UV complete model namely, the Minimal Supersymmetric Standard Model.

show abstract

Probing magnetic moment operators in production and rare decay *

Abstract: The magnetic moment ( ) and weak magnetic moment ( ) of charged leptons and quarks are sensitive to quantum effects of new physics heavy resonances. In effective field theory, and are induced by two independent operators. Therefore, one ha… Show more

Cited by 5 publications

References 46 publications

Boosted tau lepton as a microscope and macroscope

Boosted tau lepton as a microscope and macroscope

Boosted Tau Lepton as a Microscope and Macroscope

Exploring Higgs-photon production at the LHC

Contact Info

Product

Resources

About