Probing heavy charged fermions at e+e− collider using the optimal observable technique

Bhattacharya, Subhaditya; Jahedi, Sahabub; Wudka, José

doi:10.1007/jhep05(2022)009

Cited by 14 publications

(7 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Investigation of top quark interaction at γγ collider [58][59][60], measurement of top-Yukawa couplings at LHC [61], muon collider [62] and eγ collider [63] have also been done in context of OOT. Recent work on OOT includes the Z couplings of heavy charged fermions at e + e − colliders [64] as well as exploring NP effects in flavor physics scenarios [65][66][67]. In this work, we opt for this powerful technique to estimate the sensitivity of NP couplings by using above described CM energy and integrated luminosity at CLIC.…”

Section: Introductionmentioning

confidence: 99%

Probing new physics in dimension-8 neutral gauge couplings at e+e− colliders

Ellis

Xiao

2020

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

We investigate the measurement of non-standard ZZV (V = γ, Z) couplings through Z-boson pair production at the e + e − colliders. We adopt Standard Model Effective Field Theory (SMEFT) approach to study these anomalous neutral triple gauge couplings. There are one CP-conserving and three CP-violating dim-8 SMEFT operators that contribute to ZZV couplings. Using optimal observable technique , the sensitivity of these NP couplings has been estimated and then we compare it with the latest experimental limits on dim-8 couplings at CERN LHC. Effect of beam polarization and correlations among CP-violating ZZV couplings are discussed. Comparison of statistical limits of new physics couplings between optimal observable technique and contemporary cut-based analysis has also been studied in detail.

show abstract

Section: Introductionmentioning

confidence: 99%

Probing new physics in dimension-8 neutral gauge couplings at e+e− colliders

Ellis

Xiao

2020

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

show abstract

“…In this section we provide a brief summary of the derivation of the statistical uncertainties of the NP physics in the OOT approach. The results here are a straightforward extension of the OOT expression obtained in [46,47,64]; the derivation is summarized in the appendix.…”

Section: Optimal Uncertaintiesmentioning

confidence: 86%

“…A few works have appeared using this approach in top-quark physics at the LHC [58][59][60] and various aspects of flavour physics [61][62][63]. Recently, the OOT has been used in studying heavy charged fermion [64] production and and di-boson production [65] at the e + e − collider.…”

Section: Introductionmentioning

confidence: 99%

Optimal determination of New Physics couplings with dominant and subdominant Standard Model contribution

Bhattacharya¹,

Jahedi²,

Wudka³

2023

Preprint

View full text Add to dashboard Cite

The accuracy to which new physics (NP) couplings can be determined using the optimal observable technique (OOT) depends on the strength of the Standard Model (SM) contribution. In this work we study this effect in two cases: one where the SM contribution is dominant and another where it is subdominant. For the first we consider t t production in presence of dimension six effective operators and determine the optimal statistical precision to which the Wilson coefficients can be extracted in an e + e − collider. As an example of NP dominance we consider the production of heavy charged scalars in several 2-Higgs multiplet models (with and without right handed neutrino contributions), and again determine the optimal range of statistical uncertainty for the NP couplings. We confirm the expectation that the optimal estimation of NP couplings with minimal SM interference is more precise than those where SM dominates, and discuss the effects of the efficiency of background reduction, luminosity and beam polarization.

show abstract

“…Inspiration from the study of compressed spectra has lead researchers to explore new kinematic variables where signatures for new physics may be lurking and to devise ways and means of exploiting the existent data to the maximum using such variables [337,[855][856][857][858][859][860][861][862][863][864][865][866][867][868][869][870][871]. Inevitably, such searches have led to the use of machine learning tools to sift and find patterns in the data.…”

Section: New Variables For Bsm Studiesmentioning

confidence: 99%

Indian contributions to LHC theory

Raychaudhuri

2023

Eur. Phys. J. Spec. Top.

View full text Add to dashboard Cite

Indian scientists began to work on the theoretical aspects of LHC physics from the early 1980s, at the same time when the rest of the world started taking interest in this then-futuristic topic. From this point grew a whole school of collider phenomenologists, who now form a significant fraction of the Indian high-energy physics community. This article briefly reviews the growth and contributions of the Indian school, on the way describing some of the physics ideas while placing the work in the international context, and proceeding thus, brings the story up to date in mid-2022.Dedicated to the memory of the late D.P. Roy (1941Roy ( -2017, the father of Indian collider theory. The expectant 80sThe LHC owes its origin [1] to CERN's far-sighted leaders, Léon van Hove, who served from 1976-1980 as the Scientific Director-General, and Technical Director-General Sir John Adams (1976)(1977)(1978)(1979)(1980)(1981), who resolved that it would be feasible and scientifically rewarding to build the next-generation storage ring at CERN. Thus, in 1977, Adams wrote the crucial concept note that the LEP collider 1 tunnel, which would be excavated in the 1980s, should be made large enough to accommodate the superconducting magnets required for a future phase of proton acceleration at higher energies. This 1977 note may be thought of as the genesis of the LHC. By 1978, it was already well known in the community, even though the formal approval for the LEP came only in 1981, and the machine itself started running in 1989 [2]. However, the fact that the 20 TeV LHC would eventually come and that the physics at such a machine should be studied, was in the air right from the early 1980s onward. Moreover, the USA was supposed to build a 40 TeV Superconducting Super Collider (SSC) which, sadly, never materialised 2 . The 1980s were, in fact, a period of great optimism for high-energy physics -or, as it was then more commonly known, elementary particle physics. One trigger for this may have lain in the decision of the Nobel Prize committee, in 1979, to recognise the work of Glashow (1961) [3], of Salam (1966-1968 1 The Large Electron-Positron collider.2 It was sanctioned in 1989, and eventually cancelled in 1993.

show abstract

Probing heavy charged fermions at e+e− collider using the optimal observable technique

Cited by 14 publications

References 33 publications

Probing new physics in dimension-8 neutral gauge couplings at e+e− colliders

Probing new physics in dimension-8 neutral gauge couplings at e+e− colliders

Optimal determination of New Physics couplings with dominant and subdominant Standard Model contribution

Indian contributions to LHC theory

Contact Info

Product

Resources

About