arXiv : Interpretation of the LHCb $P_c$(4312)$^+$ Signal

Fernández-Ramírez, C.; Mathieu, V.; Mikhasenko, M.; Szczepaniak, A.P.; Silva-Castro, J.A.; Albaladejo, M.; Jackura, A.; Pilloni, A.

doi:10.1103/PhysRevLett.123.092001

Article
Report number	arXiv:1904.10021 ; JLAB-THY-19-2921
Title	Interpretation of the LHCb $P_c$(4312)$^+$ Signal
Author(s)	Fernández-Ramírez, C. (Mexico U., ICN) ; Pilloni, A. (ECT, Trento ; Fond. Bruno Kessler, Trento ; INFN, Genoa) ; Albaladejo, M. (Jefferson Lab) ; Jackura, A. (Indiana U., CEEM ; Indiana U.) ; Mathieu, V. (Jefferson Lab) ; Mikhasenko, M. (CERN) ; Silva-Castro, J.A. (Mexico U., ICN) ; Szczepaniak, A.P. (Jefferson Lab ; Indiana U., CEEM ; Indiana U.)
Collaboration	JPAC Collaboration
Publication	2019-08-30
Imprint	2019-04-22
Number of pages	6
Note	6 pages + Supplemental material. Version accepted for publication in Physical Review Letters
In:	Phys. Rev. Lett. 123 (2019) 092001
DOI	10.1103/PhysRevLett.123.092001 (publication)
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Abstract	We study the nature of the new signal reported by LHCb in the J/psi p spectrum. Based on the S-matrix principles, we perform a minimum-bias analysis of the underlying reaction amplitude, focusing on the analytic properties that can be related to the microscopic origin of the Pc(4312) peak. By exploring several amplitude parametrizations, we find evidence for the attractive effect of the Sigma_c+ D0bar channel, which is not strong enough, however, to form a bound state.
Copyright/License	preprint: (License: CC BY-NC-SA 4.0) publication: © 2019-2025 authors (License: CC BY.4.0)

$Fit to the $\cos\theta_{P_c}$-weighted \jpsip mass distribution (left) and pole positions (right) for the three-channel case. Notation is the same as in Figs.~\ref{fig:fits} and~\ref{fig:poles}. The poles are obtained from the $10^4$ bootstrap fits and lie on the II and IV Riemann sheets (which are continuously connected above the \SigmaD threshold) and on the VII sheet (which is continuously connected to the II sheet above the $\Sigma_c^{++} D^-$ threshold). For each bootstrap fit only one pole appears in this region. The blue ellipse accounts for 68\% of the cluster concentrating above the \SigmaD threshold.$ $Fit to the $\cos\theta_{P_c}$-weighted \jpsip mass distribution (left) and pole positions (right) for the three-channel case. Notation is the same as in Figs.~\ref{fig:fits} and~\ref{fig:poles}. The poles are obtained from the $10^4$ bootstrap fits and lie on the II and IV Riemann sheets (which are continuously connected above the \SigmaD threshold) and on the VII sheet (which is continuously connected to the II sheet above the $\Sigma_c^{++} D^-$ threshold). For each bootstrap fit only one pole appears in this region. The blue ellipse accounts for 68\% of the cluster concentrating above the \SigmaD threshold.$ $Fit to the $\cos\theta_{P_c}$-weighted \jpsip mass distribution for the Flatt\'e case. Notation is as in Fig.~\ref{fig:fits}. This parameterization does not generate a pole in the region of interest.$ Show more plots

Corresponding record in: Inspire

Back to search

记录创建於2019-05-09，最後更新在2024-09-03

Article from SCOAP3:

PDF

全文:

PDF

External link:

JLab Document Server

Add to personal basket
Export as BibTeX, MARC, MARCXML, DC, EndNote, NLM, RefWorks

CERN Document Server

Access articles, reports and multimedia content in HEP

Main menu

CERN Accelerating science