Physical Regions in Invariant Variables for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>n</mml:mi></mml:math>Particles and the Phase-Space Volume Element

Byers, Nina; Yang, C. N.

doi:10.1103/revmodphys.36.595

Cited by 70 publications

(33 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[61], which relies on Ref. [62]. It is helpful to transform the phase space integral to an integration over the set of independent Lorentz invariants κ ij , the scalar product of the two four vectors k i and k j , instead of angular variables which are not Lorentz invariant.…”

Section: Hlc Llmentioning

confidence: 99%

The Higgs width in the SMEFT

Brivio

Corbett

Trott

2019

J. High Energ. Phys.

View full text Add to dashboard Cite

We calculate the total and partial inclusive Higgs widths at leading order in the Standard Model Effective Field Theory (SMEFT). We report results incorporating SMEFT corrections for two and four body Higgs decays through vector currents in this limit. The narrow width approximation is avoided and all phase space integrals are directly evaluated. We explain why the narrow width approximation fails more significantly in the SMEFT compared to the SM, despite the narrowness of the observed SU(2) × U(1) bosons in both theories. Our results are presented in a manner that allows various input parameter schemes to be used, and they allow the inclusive branching ratios and decay widths of the Higgs to be numerically determined without a Monte Carlo generation of phase space for each Wilson coefficient value chosen.

show abstract

Section: Hlc Llmentioning

confidence: 99%

The Higgs width in the SMEFT

Brivio

Corbett

Trott

2019

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…As described in ref. [49], the kinematically allowed region is given by ∆ 1,2,3,4 > 0, with the boundary located at 6…”

Section: Mathematical Description Of Four-body Phase Spacementioning

confidence: 99%

Enhancing the discovery prospects for SUSY-like decays with a forgotten kinematic variable

Debnath

Matchev

Yang

et al. 2019

J. High Energ. Phys.

View full text Add to dashboard Cite

The lack of a new physics signal thus far at the Large Hadron Collider motivates us to consider how to look for challenging final states, with large Standard Model backgrounds and subtle kinematic features, such as cascade decays with compressed spectra. Adopting a benchmark SUSY-like decay topology with a four-body final state proceeding through a sequence of two-body decays via intermediate resonances, we focus our attention on the kinematic variable ∆ 4 which previously has been used to parameterize the boundary of the allowed four-body phase space. We highlight the advantages of using ∆ 4 as a discovery variable, and present an analysis suggesting that the pairing of ∆ 4 with another invariant mass variable leads to a significant improvement over more conventional variable choices and techniques.

show abstract

“…A less well-known formulation expressed purely in terms of Lorentz scalars can be constructed as follows [3].…”

Section: Phase Space Boundary Enhancementmentioning

confidence: 99%

“…The kinematically accessible region of phase space corresponds to ∆ 1,2,3 > 0, ∆ 4 ≥ 0 and ∆ 5,...,n = 0 [3]. For n ≥ 4, the phase space volume element locally has the form [3,2] …”

Section: Phase Space Boundary Enhancementmentioning

confidence: 99%

Mass Reconstruction for High Multiplicity Final States Using the Boundary of Phase Space

Klimek¹,

Yang²

2017

Proceedings of Fourth Annual Large Hadron Collider Physics — PoS(LHCP2016)

View full text Add to dashboard Cite

The lack of conclusive evidence for new physics in Run I of the LHC suggests that future discoveries may manifest themselves with small numbers of signal events. In this case, it will be crucial to use analysis techniques that extract as much information as possible from a limited number of events. Previously, a technique exploiting correlations in the full multi-particle phase space to efficiently reconstruct intermediate and invisible masses in decay chains has been demonstrated for the case of four final state particles. We review this technique and discuss its generalization to five or more final state particles. We also demonstrate a new technique for implementing a mass finding algorithm based on the same principle in the presence of realistic backgrounds with Voronoi tessellations.

show abstract

Physical Regions in Invariant Variables fornParticles and the Phase-Space Volume Element

Cited by 70 publications

References 3 publications

The Higgs width in the SMEFT

The Higgs width in the SMEFT

Enhancing the discovery prospects for SUSY-like decays with a forgotten kinematic variable

Mass Reconstruction for High Multiplicity Final States Using the Boundary of Phase Space

Contact Info

Product

Resources

About