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Single-photon decays in systems with at least one heavy quark
Marek Karliner, Jonathan L. Rosner
Hadrons containing at least one heavy quark (charm or bottom) frequently have small enough natural widths that decay modes involving a single photon have detectable branching fract…
Excited baryons as 2S states
Marek Karliner, Jonathan L. Rosner
The LHCb experiment has recently reported two excited resonances decaying to , with masses about 3185 and 3327 MeV. We discuss their assignment to and $…
Substructure of Multiquark Hadrons (Snowmass 2021 White Paper)
Nora Brambilla, Hua-Xing Chen, Angelo Esposito +27
In recent years there has been a rapidly growing body of experimental evidence for existence of exotic, multiquark hadrons, i.e. mesons which contain additional quarks, beyond the…
The doubly charmed strange tetraquark
Marek Karliner, Jonathan L. Rosner
The LHCb experiment at CERN has discovered a doubly charmed isoscalar tetraquark with the quantum numbers of and mass of about 3875 MeV/, decaying…
Configuration mixing in strange tetraquarks
Marek Karliner, Jonathan L. Rosner
The BESIII Collaboration has observed a candidate for a tetraquark at MeV and width MeV…
Strange pentaquarks and excited hyperons in final states
Marek Karliner, Jonathan L. Rosner
We comment on the recent evidence by the LHCb Collaboration for a structure in the final state produced in the decay , with minimal quark content $c \bar…
Interpretation of structure in the di- spectrum
Marek Karliner, Jonathan L. Rosner
Structure in the di- mass spectrum observed by the LHCb experiment around 6.9 and 7.2 GeV is interpreted in terms of and resonances between a diq…
First exotic hadron with open heavy flavor: tetraquark
Marek Karliner, Jonathan L. Rosner
The LHCb Collaboration has reported resonant activity in the channel , identifying two components: with at MeV, MeV…
Interpretation of excited signals
Marek Karliner, Jonathan L. Rosner
Recently LHCb reported the discovery of four extremely narrow excited baryons decaying into . We interpret these baryons as bound states of a -quark and a -w…
Mass inequalities for baryons with heavy quarks
Marek Karliner, Jonathan L. Rosner
Baryons with one or more heavy quarks have been shown, in the context of a nonrelativistic description, to exhibit mass inequalities under permutations of their quarks, when spin a…
Heavy-quark exotics
Jonathan L. Rosner
The heavy quarks and stabilize exotic meson and baryon states. We discuss work with M. Karliner on molecules containing and $…
Status of isospin splittings in mesons and baryons
Marek Karliner, Jonathan L. Rosner
Current measurements of isospin splittings in mesons and baryons are sufficiently precise that they allow estimates of the mass difference between constituent up and down quarks. S…
Addendum to "Overview of decays''
Michael Gronau, Jonathan L. Rosner, Charles G. Wohl
An earlier analysis of observed and anticipated decays [M. Gronau and J. L. Rosner, Phys.\ Rev.\ D {\bf 97}, 116015 (2018)] is provided with a table of inputs and a figure de…
Scaling of P-wave excitation energies in heavy-quark systems
Marek Karliner, Jonathan L. Rosner
A simple regularity in anticipating P-wave excitation energies of states with heavy quarks is noted. It can apply to systems such as the negative-parity , , and , $\…
Strange baryons with two heavy quarks
Marek Karliner, Jonathan L. Rosner
The LHCb Experiment at CERN has observed a doubly-charmed baryon with a mass of MeV, consistent with many predictions. We use the same methods…
An overview of decays
Michael Gronau, Jonathan L. Rosner
The decays of the ground-state charmed baryon are now close to being completely mapped out. In this paper we discuss some remaining open questions, whose answers can help she…
Multiquark States
Marek Karliner, Jonathan L. Rosner, Tomasz Skwarnicki
Why do we see certain types of strongly interacting elementary particles and not others? This question was posed over 50 years ago in the context of the quark model. M. Gell-Mann a…
Quark-level analogue of nuclear fusion with doubly-heavy baryons
Marek Karliner, Jonathan L. Rosner
The recent discovery by LHCb of the first doubly-charmed baryon at MeV implies a large binding energy MeV between the two quar…
Discovery of doubly-charmed Xi_{cc} baryon implies a stable (b b ubar dbar) tetraquark
Marek Karliner, Jonathan L. Rosner
Recently LHCb discovered the first doubly-charmed baryon at MeV, very close to our theoretical prediction. We use the same methods to predict…
Isospin splittings in baryons with two heavy quarks
Marek Karliner, Jonathan L. Rosner
Isospin splittings in baryons with two heavy quarks and a or quark are calculated using simple methods proposed previously by the authors. The results are $M(Ξ_{cc}^{++})-M…
photoproduction on deuterium as a test for exotic baryons
Marek Karliner, Jonathan L. Rosner
We extend a previous study of photoproduction of exotic baryon resonances to the reaction , which permits simultaneous investigation of the reactions $γ+ p \to…
Very narrow excited baryons
Marek Karliner, Jonathan L. Rosner
Recently LHCb reported the discovery of five extremely narrow excited baryons decaying into . We interpret these baryons as bound states of a -quark and a -w…
Controlling width effects for a precise value of in
Michael Gronau, Jonathan L. Rosner
It has been pointed out that the currently most precise determination of the weak phase of the Cabibbo-Kobayashi-Maskawa (CKM) matrix achieved in decays is sus…
states: masses, production, and decays
Marek Karliner, Jonathan L. Rosner, Shmuel Nussinov
The question of whether there exist bound states of two heavy quarks and antiquarks , distinct from a pair of quark-antiquark mesons, has been…