Search arXiv⌕ Search
Home/Archive/arXiv

arXiv · 0706.2163

Predictions for masses of Xi_b baryons

Marek Karliner·Boaz Keren-Zur·Harry J. Lipkin·Jonathan L. Rosner
View original source ↗Read source document ↗Export metadata ↓

Abstract

The recent observation by CDF of Sigma_b^{+-} (uub and ddb) baryons within 2 MeV of the predicted Sigma_b - Lambda_b splitting has provided strong confirmation for the theoretical approach based on modeling the color hyperfine interaction. We now apply this approach to predict the masses of the Xi_b family of baryons with quark content usb and dsb - the ground state Xi_b at 5790 to 5800 MeV, and the excited states Xi_b^' and Xi_b^*. The main source of uncertainty is the method used to estimate the mass difference m_b - m_c from known hadrons. We verify that corrections due to the details of the interquark potential and to Xi_b-Xi_b^' mixing are small.

Explore related subjects

hep-phhep-ex

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Marek Karliner, Boaz Keren-Zur, Harry J. Lipkin, Jonathan L. Rosner. 2007-06-23. Predictions for masses of Xi_b baryons. https://arxiv.org/abs/0706.2163

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Resumming transverse observables for NNLO+PS matching in GENEVA

We study the use of higher-order resummation for transverse observables to achieve NNLO+PS matching within the GENEVA framework. In particular, we embed $q_T$ resummation for colour-singlet production at N$^3$LL obtained via soft-collinear effective theory and implemented in the library SCETlib within GENEVA. We also study for the first time the use of the generalised $N$-jettiness variable in parton shower matching, and achieve the resummation of the one-jettiness defined with transverse measures up to NLL$'$ accuracy. As a case study, we use these resummed calculations to construct a GENEVA NNLO+PS generator for Higgs boson production in heavy-quark annihilation (with beauty or charm-quarks in the initial state). The use of transverse measures facilitates the matching to showers ordered in transverse momentum, and opens the door to possible future extensions of this approach to the production of colour singlets in association with final-state jets.

hep-ph↗
arXiv2026

Matching HEFT and SMEFT in double and triple Higgs production from weak boson fusion

In this work we study the matching between the two most popular effective field theories for beyond standard model Higgs physics, SMEFT and HEFT. To perform this matching we follow the approach of identifying the corresponding scattering amplitudes for physical processes in both theories, instead of the most usual approach of relating the corresponding effective Lagrangians or effective actions. In this work we focus on the physical processes of double and triple Higgs production from weak boson fusion, in particular, $WW \to HH$, $ZZ \to HH$, $WW \to HHH$ and $ZZ \to HHH$ and complement them with the elastic scattering $HH \to HH$. We present here the analytical solution to this matching in terms of relations among the coefficients in both theories and comment on the most relevant phenomenological implications of such relations for collider physics.

hep-ph↗
arXiv2026

QCD with Analytic Coupling: Recent Results

This work provides an overview of recent results obtained in the framework of QCD with analytic coupling. Applications to the polarized Bjorken and Gross-Llewellyn Smith sum rules are considered.

hep-ph↗