Production of excited charmed mesons at LEP
نویسنده
چکیده
Studies of the production of orbitally excited charmed and charmed strange mesons in eecollisions, performed by the LEP collaborations are reviewed. Measurements of the production rates of orbitally excited charmed mesons in semileptonic b decays are presented. Searches for charmed meson radial excitations are also briefly discussed.
منابع مشابه
ar X iv : h ep - e x / 99 02 02 6 v 1 1 8 Fe b 19 99 UGVA - DPNC 1998 / 11 - 180 Nov . 1998 B and D Spectroscopy at LEP
Results from the four LEP experiments ALEPH, DELPHI, L3, and OPAL on the spectroscopy of B and charmed mesons are presented. The predictions of Heavy Quark Effective Theory (HQET) for the masses and the widths of excited L = 1 B mesons are supported by a new measurement from L3. A few Bc candidate events have masses consistent with the recent CDF observation and the predictions. New results on ...
متن کاملCharm Meson Spectroscopy at BABAR and CLEO-c
During the last few years many newD, Ds, charmonium, and charmed baryon excited states have been discovered. Some of these states were not expected theoretically; their masses, widths, quantum numbers, and decay modes did not fit the existing spectroscopic classification, which was based mostly on potential model calculations. The theoretical models had to be improved and new approaches have be...
متن کاملHadrons with charmed quarks in matter
We investigate the DD̄ decay width of excited charmonium states at finite nuclear density with simultaneous modification of both D and D̄ mesons in nuclear matter. The strongest effect is found for the Ψ ′ meson. The medium modification can be detected by dilepton spectroscopy as substantial Ψ ′ broadening and anomalous Ψ ′ absorption. PACS. 13.25.Gv Decays of J/Ψ , Υ , and other quarkonia – 14.4...
متن کاملSemileptonic B decays to excited charmed mesons
Exclusive semileptonic B decays into excited charmed mesons are investigated at order ΛQCD/mQ in the heavy quark effective theory. Differential decay rates for each helicity state of the four lightest excited D mesons (D1, D ∗ 2, D∗ 0, andD ∗ 1) are examined. At zero recoil, ΛQCD/mQ corrections to the matrix elements of the weak currents can be written in terms of the leading IsgurWise function...
متن کاملB/b̄ Flavour Tagging and Doubly Charmed B Decays in Aleph
This contribution concerns three contributed papers that share the common feature of analysing fully(or almost fully-) reconstructed B decays coming from a sample of four million hadronic Z decays collected with the ALEPH detector at LEP. In the first paper 1, 404 charged and neutral B mesons decaying in standard modes are fully reconstructed and used to look for resonant structure in the Bπ± s...
متن کامل