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About 1,361 papers for “Dalitz plot”
Fernández Martín, Javier · Dipòsit Digital de la Universitat de Barcelona (Universitat de Barcelona) · 2025
Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2025, Tutors: Vincent Mathieu, Iñigo Asiáin
Cited by 0
Sudeep Ghosh, Ankhi Roy · Springer Link (Chiba Institute of Technology) · 2016
\nIn this talk we present preliminary experimental results of Dalitz plot analysis of the decay η′ → η π+ π−, based on the CLAS data collected during photoproduction experiment γ p → η′ p for the center-of-mass energy from 1.90 to 2.62 GeV at Jefferson Lab. This experiment will enable us to report precise Dalitz plot parameters of the η′ → η π+ π− decay for the first time in a photoproduction experiment.\n
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L. Leśniak, R. Kamiński, A. Furman et al. · Springer Link (Chiba Institute of Technology) · 2012
The availaible data on the D0 → KS0π+π− decays are analysed in the framework of the quasi two-body QCD factorization approximation. The annihilation, via Wexchange, amplitudes are added to the weak-decay tree amplitudes. The doubly Cabibbo suppressed parts of the amplitudes are also considered. The strong interactions between the kaon-pion and pion-pion pairs in the S-, P- and D-final states are described in terms of the corresponding form factors. The kaon-pion or pion-pion scalar and vector form factors are constrained by other experimental data. Unitarity, analyticity and chiral symmetry are also used to obtain their functional forms. We go through a minimization procedure to reproduce the \nKS0π−, KS0π+ and π+ π- effective mass projections of the Dalitz plot distributions. The large number (27) of non-zero amplitudes leads to a large number of parameters. The resulting model distributions and branching fractions are compared to the accurate Belle Collaboration data.\n
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L. Caldeira Balkeståhl · Springer Link (Chiba Institute of Technology) · 2014
\nWe present the status of an ongoing analysis of the η → π+π−π0 Dalitz plot, as well as preliminary results for the Dalitz plot parameters. The analysis is based on data taken at the DAΦNE φ-factory with the KLOE detector.
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Jonathan L. Rosner · Nuclear Physics B - Proceedings Supplements · 2006
Cited by 1Open access
2010
are expected to proceed dominantly through resonant two-body decays [1]; see Ref. [2] for a review of resonance phenomenology. The amplitudes are typically calculated with the Dalitz-plot analysis technique [3], which uses the minimum number of
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Leonard Leśniak, Jean-Pierre Dedonder, Robert Kamiński et al. · Springer Link (Chiba Institute of Technology) · 2014
\nA quasi two-body QCD factorization is used to study the D0 → KS0π+π− decays. The presently available high-statistics Dalitz plot data of this process measured by the Belle and BABAR Collaborations are analyzed together with the τ− → KS0π−ντ decay data. The total experimental branching fraction is also included in the fits which show a very good overall agreement with the experimental Dalitz plot density distributions. The branching fractions of the dominant channels compare well with those of the isobar Belle or BABAR models. We show that the branching fractions corresponding to the annihilation amplitudes are significant.\n
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T. Latham · AIP conference proceedings · 2016
The Laura++ software package is designed for performing fits of amplitude models to data from decays of spin-0 particles into final states containing three spin-0 particles -so-called Dalitz-plot analysis. An overview of the amplitude formalism and its software implementation is given as well as summaries of recently added features and planned future developments.
Cited by 16Open access
John Back, T. Gershon, Paul Fraser Harrison et al. · Greater South Information System · 2018
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. Program title: Laura ++ Program Files doi: http://dx.doi.org/10.17632/jn266r57nk.1 Licensing provisions: Apache License, Version 2.0 Programming language: C++ Nature of problem: Dalitz-plot analysis of particle decays is an important and increasingly utilised technique in particle physics, in particular in heavy flavour physics. While various software tools have been used for Dalitz plot analyses, these are usually not well optimised and are neither scalable for use with larger samples nor flexible enough to be easily adapted for other analyses. Solution method: Laura ++ is a dedicated package for performing Dalitz-plot analysis that is flexible enough both to be used in a range of experimental environments and to describe many possible different decays and types of analyses. It allows analysts to create amplitude models to describe the decay of interest and to use those models either to generate pseudoexperiments or to fit them to data.
Cited by 0Open access
Jepson Hart, Alistair Jepson Hart · 2006
Results of an amplitude analysis of the B ± → K ± K∓K ± Dalitz plot are presented. The analysis is made using an integrated luminosity of 210.6 fb −1, recorded by the BABAR detector at the PEP-II asymmetric B Factory. This dataset corresponds to 231.8 million BB pairs. Branching fractions and 90 % confidence level upper limits are calculated and averaged over charge conjugate states (B). For those modes that have significant branching fraction measurements CP violating charge asymmetry measurements are also presented (ACP). However the asymmetry for all modes is consistent with zero. A feature is found around 1.5 GeV/c 2 that corresponds to no known resonance. We measure it to be a scalar resonance of mass (1.523 +0.028 −0.020) GeV/c 2 and width
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P. Dini · International Journal of Modern Physics A · 2005
Charm meson decay-dynamics has been extensively studied in the last decade. Dalitz plot analysis has revealed as a powerful tool for investigating effects of resonant substructures, interference patterns and final-state-interactions in the charm sector. Recent results from FOCUS on D + and D s decays will be presented with particular emphasis on the decay amplitude formalism; Isobar model and K-matrix model results will be compared and discussed.
Cited by 3
John Back, T. Gershon, Paul Fraser Harrison et al. · Greater South Information System · 2018
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. Program title: Laura ++ Program Files doi: http://dx.doi.org/10.17632/jn266r57nk.1 Licensing provisions: Apache License, Version 2.0 Programming language: C++ Nature of problem: Dalitz-plot analysis of particle decays is an important and increasingly utilised technique in particle physics, in particular in heavy flavour physics. While various software tools have been used for Dalitz plot analyses, these are usually not well optimised and are neither scalable for use with larger samples nor flexible enough to be easily adapted for other analyses. Solution method: Laura ++ is a dedicated package for performing Dalitz-plot analysis that is flexible enough both to be used in a range of experimental environments and to describe many possible different decays and types of analyses. It allows analysts to create amplitude models to describe the decay of interest and to use those models either to generate pseudoexperiments or to fit them to data.
Cited by 0Open access
Hanhart, C. · JuSER (Forschungszentrum Jülich) · 2011
Cited by 0
G. A. Akopdzhanov, V. B. Anikeev, V. A. Bezzubov et al. · 2005
The g, h, and k Dalitz plot parameters, which are coefficients in a series expansion of the squared module of the matrix element |M(u, v) | 2 ∝ 1 + gu + hu 2 + kv 2 (u, v are invariant variables), have been measured for K ± π ± π 0 π 0 decays using 35 GeV/c hadron beams at the IHEP (Protvino) accelerator. Dependences of parameters and fit quality on the π 0 π 0 mass cut were investigated for the first time. It is shown that the expansion mentioned above does not fit the experimental data near the π + π – mass threshold and that addition of the cubic terms only slightly improves the fit quality. This result indicates the important role of nonanalytical terms in the matrix element that are connected with pion rescattering. A comparison of our data with previous measurements is presented.
Cited by 0
Aubert, B, Barate, R, Boutigny, D et al. · eScholarship (California Digital Library) · 2005
A Dalitz plot analysis of approximately 12500 D0 events reconstructed in the hadronic decay D0âKÌ0K+K- is presented. This analysis is based on a data sample of 91.5fb-1 collected with the BABAR detector at the PEP-II asymmetric-energy e+e- storage rings at SLAC running at center-of-mass energies on and 40 MeV below the Î¥(4S) resonance. The events are selected from e+e-âccÌ annihilations using the decay D*+âD0Ï+. The following ratio of branching fractions has been obtained: BR= Î(D0âKÌ0K+K-)Î(D0âKÌ0Ï+Ï-)=(15.8±0. 1(stat.)±0.5(syst.))Ã10-2. Estimates of fractions and phases for resonant and nonresonant contributions to the Dalitz plot are also presented. The a0(980)âKÌK projection has been extracted with little background. A search for CP asymmetries on the Dalitz plot has been performed. © 2005 The American Physical Society.
Cited by 0Open access
Ghosh, Sudeep, Roy, Ankhi, CLAS-Collaboration et al. · JuSER (Forschungszentrum Jülich) · 2016
In this talk we present preliminary experimental results of Dalitz plot analysis of the decay η′ → η π+ π−, based on the CLAS data collected during photoproduction experiment γ p → η′ p for the center-of-mass energy from 1.90 to 2.62 GeV at Jefferson Lab. This experiment will enable us to report precise Dalitz plot parameters of the η′ → η π+ π− decay for the first time in a photoproduction experiment.
Cited by 0Open access
L. Caldeira Balkeståhl · Springer Link (Chiba Institute of Technology) · 2014
\nBased on 1.6 fb−1 of data taken with the KLOE detector at the DAϕNE ϕ-factory, we present the status of the ongoing analysis of the η → π+π−π0 Dalitz plot. With 4.48 ⋅ 106 events in the Dalitz plot, the preliminary results for the Dalitz plot parameters are: a = 1.104(3), b = 0.144(3), d = 0.073(3) and f = 0.155(6).\n
Cited by 0
2010
Weak nonleptonic decays of charm mesons are expected to proceed dominantly through resonant two-body decays in several theoretical models [1]. The Dalitz-plot analysis technique [2,3] has been applied to the decays D → rc, r → ab where the decay products a, b, and c are K or π and the intermediate state r is a scalar, vector, or tensor meson. Table 1 lists published analyses of D → Kππ, → πππ, → KKπ, and → KKK decays. The analyses include studies of doubly Cabibbo-suppressed decays [4,5], searches for CP violation [5–8], properties of established light mesons [9–11], and properties of ππ [4,11,12] and Kπ [13] S-wave states. Future studies could improve sensitivity to D 0 –D 0 mixing [14]. The amplitude of the process, D → rc, r → ab, isgivenby the product of three factors: the angular distributions [15,16] of final-state particles, the barrier form factors [17,18] for the production of rc and ab, respectively, and the dynamical function describing the resonance r. Usually r is modeled with a Breit-Wigner, and the nonresonant contribution is parameterized as an S-wave with no variation in magnitude or phase across the Dalitz plot. Some more recent analyses have used the K-matrix formalism [19] with the P-vector approximation [20] to describe the ππ S-wave. In the following, we discuss a number of subjects of current interest. D 0 → K 0 S π+ π − — Several experiments have analyzed the decay D 0 → K 0 S π+ π −. The earliest analyses, by Mark II [21], Mark III [22], and E687 [23], assumed only two intermediate resonances, K 0 S ρ0, K ∗ (892) − π +, and a significant nonresonant component. Additional resonances were considered by E691 [24] but were not found to be statistically significant. ARGUS [25] and E687 [26], with more events, fit the Dalitz plot with six
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Markus Röhrken · 2015
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Sηπ Cleo · 2006
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