Surveying exotic pentaquarks with the typical $QQqq\bar{q}$ configuration

TL;DR

This paper systematically estimates the mass spectrum of exotic pentaquarks with the $QQqqar{q}$ configuration, suggesting potential stable states and guiding future experimental searches at LHCb and Belle II.

Contribution

It provides the first systematic mass spectrum estimation for $QQqqar{q}$ pentaquarks, highlighting possible stable or narrow states and aiding experimental efforts.

Findings

Potential existence of stable or narrow exotic pentaquark states.

Mass spectrum estimates guide experimental searches.

Predictions testable at LHCb and Belle II.

Abstract

As a hot issue, exploring exotic pentaquarks is full of challenges and opportunities for both theorist and experimentalist. In this work, we focus on a type of pentaquark with the $QQqq\bar{q}$ ($Q=b,c$; $q=u,d,s$) configuration, where their mass spectrum is estimated systematically. Especially, our result indicates that there may exist some stable or narrow exotic pentaquark states. Obviously, our study may provides valuable information for further experimental search for the $QQqq\bar{q}$ pentaquarks. With the running of LHCb and forthcoming Belle II, we have a reason to believe that these predictions present here can be tested.