Nuclear Theory·nucl-th

Wednesday·May 23, 2018

4 papers—1 primary·3 cross-listed

02
$K^{*}$ mesons with hidden charm arising from $K X (3872)$ and $K Z_{c} (3900)$ dynamics
Xiu-Lei Ren🇩🇪 · Brenda B. Malabarba🇧🇷 · Li-Sheng Geng🇨🇳 · K. P. Khemchandani🇨🇳 · A. Martinez Torres🇧🇷
Inspired by the recent discovery of the pentaquark states $P_{c} (4450)$ and $P_{c} (4380)$ , which can be viewed as excited nucleon states with hidden charm, we study the three-body interaction of a kaon and a pair of $D D ˉ^{*}$ in isospin 0 and 1. We show that the two body interactions stringently constrained by the existence of the $D_{s 0}^{*} (2317)$ , $D_{s 1}^{*} (2460)$ , $X (3872)$ , and $Z_{c} (3900)$ , which are widely believed to contain large $D K$ , $D^{*} K$ , and $D D ˉ^{*}$ components, inevitably lead to the existence of a heavy $K^{*}$ meson with hidden charm. Concrete coupled channel three-body calculations yield its mass and width as $(4307 \pm 2) - i (9 \pm 2)$ MeV with $I (J^{P}) = 1/2 (1^{-})$ . This state, if found experimentally, definitely cannot be accommodated in a $q q ˉ$ picture, and therefore presents a clear case of an exotic hadron.
↳ hep-phnucl-thPLB(2018)·50 citations
03
$D Ξ$ and $D^{*} Ξ$ Molecular States from One Boson Exchange
Ming-Zhu Liu🇨🇳 · Tian-Wei Wu🇨🇳 · Ju-Jun Xie🇨🇳 · Manuel Pavon Valderrama🇨🇳 · Li-Sheng Geng🇨🇳
We explore the existence of $D Ξ$ and $D^{*} Ξ$ molecular states within the one boson exchange model. We regularize the potential derived in this model with a form factor and a cut-off of the order of $1 GeV$ . To determine the cut-off, we use the condition that the $X (3872)$ is reproduced as a pole in the $J^{P C} = 1^{++}$ $D^{*} D ˉ$ amplitude. From this we find that the $J^{P} = \frac{1}{2}^{-}$ $D^{*} Ξ$ system is on the verge of binding and has an unnaturally large scattering length. For the $J^{P} = \frac{1}{2}^{-}$ $D Ξ$ and the $J^{P} = \frac{3}{2}^{-}$ $D^{*} Ξ$ systems the attraction is not enough to form a bound state. From heavy quark symmetry and the quark model we can extend the previous model to the $P Ξ_{QQ}$ and $P^{*} Ξ_{QQ}$ systems, with $P = D, B ˉ$ , $P^{*} = D^{*}, B ˉ^{*}$ and $Ξ_{QQ} = Ξ_{cc}, Ξ_{bb}$ . In this case we predict a series of triply heavy pentaquark-like molecules.
↳ hep-phhep-exnucl-thPRD(2018)·36 citations
04
Coherent vector meson production at an electron ion collider
Michael Lomnitz🇺🇸
Exclusive vector meson electroproduction over a broad $Q^{2}$ range offers a unique opportunity to probe the gluon structure of nuclei to measure nuclear shadowing, and to search for gluon saturation and/or the colored glass condensate at an Electron-Ion Collider. Understanding the kinematic distributions and cross sections for specific processes can impact detector design to maximize their acceptance and strengthen the physics case. We will discuss predictions from a Monte Carlo generator eSTARlight, a tool developed to study production of exclusive vector meson final states. We present final state distributions and production rates for the $ρ$ , $ϕ$ , J/ $ψ$ , $ψ^{'}$ and the $Υ$ states in $e p$ and $e A$ collisions at the different energies.
↳ nucl-exnucl-thPoS(2018)·4 citations

Affiliations

first authorsco-authorsvia INSPIRE

K∗ mesons with hidden charm arising from KX(3872) and KZc​(3900) dynamics

DΞ and D∗Ξ Molecular States from One Boson Exchange

Coherent vector meson production at an electron ion collider

Affiliations

$K^{*}$ mesons with hidden charm arising from $K X (3872)$ and $K Z_{c} (3900)$ dynamics

$D Ξ$ and $D^{*} Ξ$ Molecular States from One Boson Exchange