arXiv : Laura++ : a Dalitz plot fitter

Back, John; del Amo Sanchez, Pablo; Craik, Daniel; Otalora Goicochea, Juan Martin; Qian, Wenbin; Whitehead, Mark; Gershon, Tim; Ilic, Jelena; Harrison, Paul; O'Hanlon, Daniel; Puccio, Eugenia; Latham, Thomas; Silva Coutinho, Rafael

doi:10.1016/j.cpc.2018.04.017

Article
Report number	arXiv:1711.09854
Title	Laura++ : a Dalitz plot fitter
Author(s)	Back, John (Warwick U.) ; Gershon, Tim (Warwick U.) ; Harrison, Paul (Warwick U.) ; Latham, Thomas (Warwick U.) ; O'Hanlon, Daniel (Warwick U.) ; Qian, Wenbin (Warwick U.) ; del Amo Sanchez, Pablo (Annecy, LAPP) ; Craik, Daniel (MIT) ; Ilic, Jelena (Rutherford) ; Otalora Goicochea, Juan Martin (Rio de Janeiro Federal U.) ; Puccio, Eugenia (Stanford U., Phys. Dept.) ; Silva Coutinho, Rafael (Zurich U.) ; Whitehead, Mark (CERN)
Publication	2018-05-02
Imprint	2017-11-27
Number of pages	87
Note	87 pages, 16 figures, version published in Computer Physics Communications + minor corrections to GS lineshape formulae in App. B
In:	Comput. Phys. Commun. 231 (2018) 198-242
DOI	10.1016/j.cpc.2018.04.017
Subject category	physics.data-an ; Computing and Computers ; hep-ex ; Particle Physics - Experiment
Abstract	The Dalitz plot analysis technique has become an increasingly important method in heavy flavour physics. The Laura++ fitter has been developed as a flexible tool that can be used for Dalitz plot analyses in different experimental environments. Explicitly designed for three-body decays of heavy-flavoured mesons to spinless final state particles, it is optimised in order to describe all possible resonant or nonresonant contributions, and to accommodate possible CP violation effects.
Copyright/License	arXiv nonexclusive-distrib. 1.0 publication: © 2018 The Authors (License: CC-BY-4.0)

$Projections of the data and fit results onto $m(\Dm\pip)_{\rm min}$ for $\Bp \to \Dm\pip\pip$ candidates observed by the LHCb collaboration~\cite{Aaij:2016fma} on (top left) linear and (bottom right) logarithmic $y$-axis scales. Here, $m(\Dm\pip)_{\rm min}$ is the smaller of the two values of $m(\Dm\pip)$ for each $\Bp \to \Dm\pip\pip$ candidate. A legend describing the various contributions is also given. The (bottom right) Argand diagram of the $\Dm\pip$ S-wave amplitude shows the expected phase motion corresponding to the $\Dbar{}_0^*(2400)^0$ resonance. The numbered points correspond to the spline knots.$ $(Top left) kinematic boundaries of the three-body phase space for the decay $\Bs\to\Dzb\Km\pip$. The insets indicate the configuration of the final-state particle momenta in the parent rest frame at various different DP positions. (Top right) examples of the resonances which may appear in the Dalitz plot for this decay: (red) $\D^*_{s2}(2573)^-$, (orange) $\kaon^*(892)^0$, (green) $\kaon\pion$ S-wave. (Bottom) projections of this DP onto the squares of the invariant masses (from left to right): $m^2_{\Dzb\pip}$, $m^2_{\Dzb\Km}$, $m^2_{\Km\pip}$.$ $Projections of the data and fit results onto (top left) $\Km\pip$ and (top right) $\Dzb\Kp$ invariant mass distributions for $\Bs \to \Dzb\Km\pip$ candidates observed by the LHCb collaboration~\cite{Aaij:2014xza,Aaij:2014baa}. Background from $\Dz \to \Km\pip$ has been vetoed. A legend describing the various contributions is also given, together with (bottom left) a zoom around $m(\Dzb\Km) \sim 2.86 \gevcc$ and (bottom right) a projection onto the cosine of the helicity angle $\theta(\Dzb\Km)$ for candidates in that region. In the last case, projections of the results of fits with models containing either or both of the $D_{s1}^*(2860)^-$ and $D_{s3}^*(2860)^-$ resonances are shown, demonstrating the need for both to obtain a good fit to the data.$ Show more plots

Corresponding record in: Inspire

Back to search

Record created 2018-01-23, last modified 2022-08-10

Fulltext:
1-s2.0-S0010465518301334-main -

PDF
10.1016_j.cpc.2018.04.017 -

PDF
1711.09854 -

PDF
(additional files)

Add to personal basket
Export as BibTeX, MARC, MARCXML, DC, EndNote, NLM, RefWorks

CERN Document Server

Access articles, reports and multimedia content in HEP

Main menu

CERN Accelerating science