Cargando…

B_c^+- decays into tetraquarks

The recent observation by the D0 collaboration of a narrow structure X(5568) consisting of four different quark flavors bdus, has not been confirmed by LHCb. More data and dedicated analyses are needed to cover a larger mass range. In the tightly bound diquark model, we estimate the lightest bdus, 0...

Descripción completa

Detalles Bibliográficos
Autores principales: Ali, A., Maiani, L., Polosa, A.D., Riquer, V.
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.94.034036
http://cds.cern.ch/record/2144462
_version_ 1780950255257255936
author Ali, A.
Maiani, L.
Polosa, A.D.
Riquer, V.
author_facet Ali, A.
Maiani, L.
Polosa, A.D.
Riquer, V.
author_sort Ali, A.
collection CERN
description The recent observation by the D0 collaboration of a narrow structure X(5568) consisting of four different quark flavors bdus, has not been confirmed by LHCb. More data and dedicated analyses are needed to cover a larger mass range. In the tightly bound diquark model, we estimate the lightest bdus, 0^+ tetraquark at a mass of about 5770 MeV, approximately 200 MeV above the reported X(5568), and just 7 MeV below the B Kbar threshold. The charged tetraquark is accompanied by I=1 and I=0 neutral partners almost degenerate in mass. A bdus, S-wave, 1^+ quartet at 5820 MeV is implied as well. In the charm sector, cdus, 0^+ and 1^+ tetraquarks are predicted at 2365 MeV and 2501 MeV, about 40-50 MeV heavier than D_{s0}(2317) and D_{s1}(2460). bdus tetraquarks can be searched in the hadronic debris of a jet initiated by a b. However, some of them may also be produced in B_c decays. The proposed discovery modes of S-wave tetraquarks are B_c --> X_{b0} + pi with the subsequent decays X_{b0} --> B_s + pi, giving rise to final states such as B_s pi^+ pi^0. We also emphasize the importance of B_c decays as a source of bound hidden charm tetraquarks, such as B_c --> X(3872) + pi.
id cern-2144462
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
record_format invenio
spelling cern-21444622023-03-14T18:22:53Zdoi:10.1103/PhysRevD.94.034036http://cds.cern.ch/record/2144462engAli, A.Maiani, L.Polosa, A.D.Riquer, V.B_c^+- decays into tetraquarksParticle Physics - PhenomenologyThe recent observation by the D0 collaboration of a narrow structure X(5568) consisting of four different quark flavors bdus, has not been confirmed by LHCb. More data and dedicated analyses are needed to cover a larger mass range. In the tightly bound diquark model, we estimate the lightest bdus, 0^+ tetraquark at a mass of about 5770 MeV, approximately 200 MeV above the reported X(5568), and just 7 MeV below the B Kbar threshold. The charged tetraquark is accompanied by I=1 and I=0 neutral partners almost degenerate in mass. A bdus, S-wave, 1^+ quartet at 5820 MeV is implied as well. In the charm sector, cdus, 0^+ and 1^+ tetraquarks are predicted at 2365 MeV and 2501 MeV, about 40-50 MeV heavier than D_{s0}(2317) and D_{s1}(2460). bdus tetraquarks can be searched in the hadronic debris of a jet initiated by a b. However, some of them may also be produced in B_c decays. The proposed discovery modes of S-wave tetraquarks are B_c --> X_{b0} + pi with the subsequent decays X_{b0} --> B_s + pi, giving rise to final states such as B_s pi^+ pi^0. We also emphasize the importance of B_c decays as a source of bound hidden charm tetraquarks, such as B_c --> X(3872) + pi.The recent observation by the D0 collaboration of a narrow structure X(5568) consisting of four different quark flavors bdus, has not been confirmed by LHCb. In the tightly bound diquark model, we estimate the lightest bdus, 0+ tetraquark at a mass of about 5770 MeV, approximately 200 MeV above the reported X(5568), and just 7 MeV below the BK¯ threshold. The charged tetraquark is accompanied by I=1 and I=0 neutral partners almost degenerate in mass. A bdus, S-wave, 1+ quartet at 5820 MeV is implied as well. In the charm sector, cdus, 0+ and 1+ tetraquarks are predicted at 2365 and 2501 MeV, about 40–50 MeV heavier than Ds0(2317) and Ds1(2460). The bdus tetraquarks can be searched in the hadronic debris of a jet initiated by a b. However, some of them may also be produced in Bc decays, Bc→Xb0+π with the subsequent decays Xb0→Bs+π, giving rise to final states such as Bsπ+π0. We also emphasize the importance of Bc decays as a source of bound hidden charm tetraquarks, such as Bc→X(3872)+π.The recent observation by the D0 collaboration of a narrow structure X(5568) consisting of four different quark flavors bdus, has not been confirmed by LHCb. More data and dedicated analyses are needed to cover a larger mass range. In the tightly bound diquark model, we estimate the lightest bdus, 0^+ tetraquark at a mass of about 5770 MeV, approximately 200 MeV above the reported X(5568), and just 7 MeV below the B Kbar threshold. The charged tetraquark is accompanied by I=1 and I=0 neutral partners almost degenerate in mass. A bdus, S-wave, 1^+ quartet at 5820 MeV is implied as well. In the charm sector, cdus, 0^+ and 1^+ tetraquarks are predicted at 2365 MeV and 2501 MeV, about 40-50 MeV heavier than D_{s0}(2317) and D_{s1}(2460). bdus tetraquarks can be searched in the hadronic debris of a jet initiated by a b. However, some of them may also be produced in B_c decays. The proposed discovery modes of S-wave tetraquarks are B_c --> X_{b0} + pi with the subsequent decays X_{b0} --> B_s + pi, giving rise to final states such as B_s pi^+ pi^0. We also emphasize the importance of B_c decays as a source of bound hidden charm tetraquarks, such as B_c --> X(3872) + pi.arXiv:1604.01731DESY-16-045oai:cds.cern.ch:21444622016-04-06
spellingShingle Particle Physics - Phenomenology
Ali, A.
Maiani, L.
Polosa, A.D.
Riquer, V.
B_c^+- decays into tetraquarks
title B_c^+- decays into tetraquarks
title_full B_c^+- decays into tetraquarks
title_fullStr B_c^+- decays into tetraquarks
title_full_unstemmed B_c^+- decays into tetraquarks
title_short B_c^+- decays into tetraquarks
title_sort b_c^+- decays into tetraquarks
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.94.034036
http://cds.cern.ch/record/2144462
work_keys_str_mv AT alia bcdecaysintotetraquarks
AT maianil bcdecaysintotetraquarks
AT polosaad bcdecaysintotetraquarks
AT riquerv bcdecaysintotetraquarks