Bayesian analysis of kaon photoproduction with the Regge-plus-resonance model

Cruz, Lesley De; Ryckebusch, Jan; Vrancx, Tom; Vancraeyveld, Pieter

doi:10.1103/physrevc.86.015212

Cited by 50 publications

(55 citation statements)

References 96 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar approaches have previously been proposed in the literature in different contexts [68][69][70][71]. In particular, the so-called Regge-plus-resonance (RPR) model developed by the Ghent group was used with remarkable success in photoproduction of strange hadrons [72][73][74]. However, due to the important differences between the RPR model and the present approach, we refer to the latter as Hybrid model.…”

Section: From Low To High Invariant Masses: Hybrid Modelmentioning

confidence: 97%

Electroweak single-pion production off the nucleon: From threshold to high invariant masses

et al. 2017

View full text Add to dashboard Cite

Background: Neutrino-induced single-pion production (SPP) provides an important contribution to neutrino-nucleus interactions, ranging from intermediate to high energies. There exists a good number of low-energy models in the literature to describe the neutrinoproduction of pions in the region around the Delta resonance. Those models consider only lowest-order interaction terms and, therefore, fail in the high-energy region (pion-nucleon invariant masses, W 2 GeV).Purpose: Our goal is to develop a model for electroweak SPP off the nucleon, which is applicable to the entire energy range of interest for present and future accelerator-based neutrino-oscillation experiments.Method: We start with the low-energy model of Ref.[1], which includes resonant contributions and background terms derived from the pion-nucleon Lagrangian of chiral-perturbation theory [2]. Then, from the background contributions, we build a high-energy model using a Regge approach. The low-and highenergy models are combined, in a phenomenological way, into a hybrid model. Results:The Hybrid model is identical to the low-energy model in the low-W region, but, for W > 2 GeV, it implements the desired high-energy behavior dictated by Regge theory. We have tested the high-energy model by comparing with one-pion production data from electron and neutrino reactions. The Hybrid model is compared with electron-proton scattering data, with neutrino SPP data and with the predictions of the NuWro Monte Carlo event generator. Conclusions: Our model is able to provide satisfactory predictions of the electroweak one-pion production cross section from pion threshold to high W . Further investigation and more data are needed to better understand the mechanisms playing a role in the electroweak SPP process in the high-W region, in particular, those involving the axial current contributions.

show abstract

Section: From Low To High Invariant Masses: Hybrid Modelmentioning

confidence: 97%

Electroweak single-pion production off the nucleon: From threshold to high invariant masses

et al. 2017

View full text Add to dashboard Cite

show abstract

“…In Refs. [72,73], the most probable resonance content (Bayesian evidence) is determined considering kaon photoproduction. Bayesian priors have also been used to restrict the low-energy constants in effective field theories to natural values and estimate the truncation errors [74,75].…”

Section: Introductionmentioning

confidence: 99%

Model selection for pion photoproduction

et al. 2017

View full text Add to dashboard Cite

Partial-wave analysis of meson and photon-induced reactions is needed to enable the comparison of many theoretical approaches to data. In both energy-dependent and independent parametrizations of partial waves, the selection of the model amplitude is crucial. Principles of the S-matrix are implemented to different degree in different approaches; but a many times overlooked aspect concerns the selection of undetermined coefficients and functional forms for fitting, leading to a minimal yet sufficient parametrization. We present an analysis of low-energy neutral pion photoproduction using the Least Absolute Shrinkage and Selection Operator (LASSO) in combination with criteria from information theory and K-fold cross validation. These methods are not yet widely known in the analysis of excited hadrons but will become relevant in the era of precision spectroscopy. The principle is first illustrated with synthetic data; then, its feasibility for real data is demonstrated by analyzing the latest available measurements of differential cross sections (dσ/dΩ), photon-beam asymmetries (Σ), and target asymmetry differential cross sections (dσT /d ≡ T dσ/dΩ) in the lowenergy regime.

show abstract

“…The interest in this state has increased since it was shown in [32] that this state was an ideal candidate to explain the peak around 1920 MeV observed in the γp → K + Λ reaction. It has been quite rewarding to see that in a recent work using Bayesian statistics to determine the most probable combinations of resonances needed to describe the γp → K + Λ reaction [33,34], a N * , J P = 1/2 + state with mass around 1900 MeV is needed to best explain the data.…”

Section: Three Body Systems Involving Kaonsmentioning

confidence: 99%

“…Yet, the atoms studied in these former works correspond to orbits with l equal or bigger than one, and one can rightly ask where are the states with l = 0. The answer to this problem was given in [3] where it was found that, based on potentials derived from chiral unitary theory [4], those states are deeply bound, by [30][31][32][33][34][35][36][37][38][39][40] MeV, but the width is about 100 MeV, which sets clear limits to their experimental observability. One must also quote that there are different claims, with larger bindings and narrower widths, based on phenomenological potentials fitted to data of kaonic atoms [1].…”

Section: Introductionmentioning

confidence: 99%

Kaonic systems

Oset¹

2012

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. I make a short review of the situation of the kaonic systems, with novel information supporting the two Λ(1405) states from the K − d → nπΣ reaction. A review is made of theKNN system with recent calculations converging to smaller bindings and larger widths. Novel systems involving two kaons and one nucleon or three kaons are also reported and finally a short discussion is made of the analogous state DNN for which recent studies find a large binding and a small width.

show abstract

Bayesian analysis of kaon photoproduction with the Regge-plus-resonance model

Cited by 50 publications

References 96 publications

Electroweak single-pion production off the nucleon: From threshold to high invariant masses

Electroweak single-pion production off the nucleon: From threshold to high invariant masses

Model selection for pion photoproduction

Kaonic systems

Contact Info

Product

Resources

About