YAM2: Yet another library for the M2 variables using sequential quadratic programming

@article{Park2021YAM2YA,
  title={YAM2: Yet another library for the M2 variables using sequential quadratic programming},
  author={Chan Beom Park},
  journal={Comput. Phys. Commun.},
  year={2021},
  volume={264},
  pages={107967}
}
  • Chan Beom Park
  • Published 2021
  • Computer Science, Physics
  • Comput. Phys. Commun.
Abstract The M 2 variables are devised to extend M T 2 by promoting transverse masses to Lorentz-invariant ones and making explicit use of on-shell mass relations. Unlike simple kinematic variables such as the invariant mass of visible particles, where the variable definitions directly provide how to calculate them, the calculation of the M 2 variables is undertaken by employing numerical algorithms. Essentially, the calculation of M 2 corresponds to solving a constrained minimization problem… Expand

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References

SHOWING 1-10 OF 78 REFERENCES
Resolving combinatorial ambiguities in dilepton t t̄ event topologies with constrained M 2 variables
We advocate the use of on-shell constrained $M_2$ variables in order to mitigate the combinatorial problem in SUSY-like events with two invisible particles at the LHC. We show that in comparison toExpand
OPTIMASS: a package for the minimization of kinematic mass functions with constraints
A bstractReconstructed mass variables, such as M2, M2C, MT*, and MT2W, play an essential role in searches for new physics at hadron colliders. The calculation of these variables generally involvesExpand
On-shell constrained M2 variables with applications to mass measurements and topology disambiguation
A bstractWe consider a class of on-shell constrained mass variables that are 3+1 dimensional generalizations of the Cambridge MT2 variable and that automatically incorporate various assumptions aboutExpand
Properties of MT2 in the massless limit
Although numerical methods are required to evaluate the stransverse mass, MT2, for general input momenta, non-numerical methods have been proposed for some special clases of input momenta. OneExpand
Mass reconstruction with M 2 under constraint in semi-invisible production at a hadron collider
The mass-constraining variable ${M}_{2}$, a ($1+3$)-dimensional natural successor of extremely popular ${M}_{T2}$, possesses an array of rich features having the ability to use on-shell massExpand
Improving ultimate convergence of an augmented Lagrangian method
TLDR
An additional hybrid algorithm is defined, in which the interior-point method is replaced by the Newtonian resolution of a Karush-Kuhn-Tucker (KKT) system identified by the augmented Lagrangian algorithm. Expand
Re-interpreting the Oxbridge stransverse mass variable MT2 in general cases
A bstractWe extend the range of possible applications of MT2 type analyses to decay chains with multiple invisible particles, as well as to asymmetric event topologies with different parent and/orExpand
Interior Methods for Nonlinear Optimization
TLDR
A condensed, selective look at classical material and recent research about interior methods for nonlinearly constrained optimization shows how their influence has transformed both the theory and practice of constrained optimization. Expand
Guide to transverse projections and mass-constraining variables
This paper seeks to demonstrate that many of the existing mass-measurement variables proposed for hadron colliders (m{sub T}, m{sub eff}, m{sub T2}, missing p-vector{sub T}, h{sub T},Expand
The stransverse mass, MT2, in special cases
This document describes some special cases in which the stransverse mass, MT2, may be calculated by non-iterative algorithms. The most notable special case is that in which the visible particles andExpand
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