Measurement of the spectroscopy of orbitally excited B mesons at LEP

We measure the masses, decay widths and relative production rate of orbitally excited B mesons using 1.25 million hadronic Z decays recorded by the L3 detector. B-meson candidates are inclusively reconstructed and combined with charged pions produced at the primary event vertex. An excess of events...

Descripción completa

Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 1999
Materias:
Ciencias Exactas
spectroscopy
B mesons
Z decays
Física
L3 detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/78131
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-78131
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
spectroscopy
B mesons
Z decays
Física
L3 detector
spellingShingle Ciencias Exactas
spectroscopy
B mesons
Z decays
Física
L3 detector
Dova, María Teresa
L3 Collaboration
Measurement of the spectroscopy of orbitally excited B mesons at LEP
topic_facet Ciencias Exactas
spectroscopy
B mesons
Z decays
Física
L3 detector
description We measure the masses, decay widths and relative production rate of orbitally excited B mesons using 1.25 million hadronic Z decays recorded by the L3 detector. B-meson candidates are inclusively reconstructed and combined with charged pions produced at the primary event vertex. An excess of events above the expected background in the Bπ mass spectrum in the region 5.6–5.8 GeV is interpreted as resulting from the decay <math><mtext>B</mtext><msup><mi></mi><mn>∗∗</mn></msup><msub><mi></mi><mn><mtext>u</mtext><mtext>,</mtext><mtext>d</mtext></mn></msub><mtext>→</mtext><mtext>B</mtext><msup><mi></mi><mn>(∗)</mn></msup><mtext>π</mtext></math>), where <math><mtext>B</mtext><msup><mi></mi><mn>∗∗</mn></msup><msub><mi></mi><mn><mtext>u</mtext><mtext>,</mtext><mtext>d</mtext></mn></msub></math> denotes a mixture of l = 1 B-meson states containing a u or a d quark. A fit to the mass spectrum yields the masses and decay widths of the B1* and B2* spin states, as well as the branching fraction for the combination l = 1 states. In addition, evidence is presented for the existence of an excited B-meson state or mixture of states in the region 5.9–6.0 GeV.
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title Measurement of the spectroscopy of orbitally excited B mesons at LEP
title_short Measurement of the spectroscopy of orbitally excited B mesons at LEP
title_full Measurement of the spectroscopy of orbitally excited B mesons at LEP
title_fullStr Measurement of the spectroscopy of orbitally excited B mesons at LEP
title_full_unstemmed Measurement of the spectroscopy of orbitally excited B mesons at LEP
title_sort measurement of the spectroscopy of orbitally excited b mesons at lep
publishDate 1999
url http://sedici.unlp.edu.ar/handle/10915/78131
work_keys_str_mv AT dovamariateresa measurementofthespectroscopyoforbitallyexcitedbmesonsatlep
AT l3collaboration measurementofthespectroscopyoforbitallyexcitedbmesonsatlep
bdutipo_str Repositorios
_version_ 1764820485411962880

Ejemplares similares