[Todos] Fwd: IFT seminar: "The new exotics Zcs(3085), Zcs(4003), Y(4230) decays and Flavour SU(3)", by Luciano Maiani

[Secretaria de Física]

********************************************
Secretaría Dpto. de Física
secre2 en fisica.unlp.edu.ar
Cecilia Cafiero / Alejandro Chiquino
115 e/48 y 49 - Detrás del Colegio Nacional
Facultad de Ciencias Exactas - UNLP
******************************************** 

-------- Mensaje original -------- 

 		ASUNTO:
 		IFT seminar: "The new exotics Zcs(3085), Zcs(4003), Y(4230) decays
and Flavour SU(3)", by Luciano Maiani

 		FECHA:
 		2021-04-23 13:31

 		REMITENTE:
 		Ernesto Arganda <ernesto.arganda en fisica.unlp.edu.ar>

 		DESTINATARIO:
 		Secretaria de Física <secre2 en fisica.unlp.edu.ar>

Para reenviar a [Todos], ¡gracias! 

Monday, April 26th, 16:00h 

The new exotics Zcs(3085), Zcs(4003), Y(4230) decays and Flavour SU(3) 

Speaker:  
Luciano Maiani 
Institution:  
Università di Roma La Sapienza. Roma. Italy 
Location&Place:  

IFT Seminar Room/Red Room 
Abstract:  

New data from BES III and LHCb indicate the existence of two hidden
charm, open strangeness resonances, Zcs(3985) and Zcs(4003). The near
degeneracy of Zcs(3985) and Zcs(4003) reproduces, in the strange sector,
the situation observed with X(3872) and Zc(3900). We show that, in the
tetraquark picture, the Zcs resonances, together with X(3872), X(4140)
and Zc(3900), neatly fit into two nonets of flavour SU(3), with JP = 1+
and opposite charge-conjugation. The mass of  the missing element of the
nonets is predicted.  
In the same framework, we have made a study of the decays of Y(4230)
observed by BES III in e+e- annihilation. Results are compared with the
well studied decays D∗ → D π decays, obtaining consistent results for
the quark-pion coupling. We extend the discussion to the decay B -> K
phi J/Psi where the signal of Zcs(4003) has been observed by LHCb. 
 These results represent a significative score in favour of the
tetraquark model. We discuss briefly further steps necessary to clarify
the nature of the exotic states under study. 

https://www.ift.uam-csic.es/es/events/new-exotics-zcs3085-zcs4003-y4230-decays-and-flavour-su3


-- 
Ernesto Arganda 
High Energy Physics Group 
Instituto de Física La Plata (IFLP-CONICET/UNLP) 
Boulevard 113 y Calle 63 - 1900 La Plata 
Buenos Aires - Argentina 
Phone: (+54) 221 4215677 
Fax: (+54) 221 4236335 
E-mail: ernesto.arganda en fisica.unlp.edu.ar
------------ próxima parte ------------
Se ha borrado un adjunto en formato HTML...
URL: <http://mail.fisica.unlp.edu.ar/pipermail/todos/attachments/20210423/ab7aeac3/attachment.html>