arXiv subjects

Roy A. Briere

Publications and source records attributed to Roy A. Briere.

5 recordsLinked to original sources

arXiv2016

Physics Accomplishments and Future Prospects of the BES Experiments at the BEPC Collider

The cornerstone of the Chinese experimental particle physics program consists of a series of experiments performed in the tau-charm energy region. China began building e+e- colliders at the Institute for High Energy Physics in Beijing more than three decades ago. Beijing Electron Spectrometer, BES, is the common root name for the particle physics detectors operated at these machines. The development of the BES program is summarized and highlights of the physics results across several topical areas are presented.

hep-ex↗

arXiv2015

Quantum Correlated Charm at Threshold and Inputs to Extractions of $γ$ from $B$ Decays

The basic physics of quantum-correlated D0, D0bar pairs produced at threshold via decays of the $ψ(3770)$ is introduced. The connection to extractions of the CKM angle $γ$ ($ϕ_3$) from $B$ decays is emphasized throughout. Recent quantum correlation results from BESIII and CLEO-c are then summarized before closing with a discussion of selected issues.

hep-ex↗

arXiv2013

Highlights from BESIII

We present a selection of recent results from the BESIII collaboration, including both charmonium and $D$ meson physics. We first discuss the observation of a charged, charmonium-like state, the $Z_c(3900)$. Conventional charmonium topics include a search for lepton flavor violation, studies of $χ_{cJ} \to γγ$ decays, and mass and width determinations for the $h_c$, $η_c(1S)$, and $η_c(2S)$. We finish with results on the decay constant $f_D$ from $D^+ \to μ^+ ν$ and on form-factors in $D^0 \to K^- e^+ ν, π^- e^+ ν$.

hep-ex↗

arXiv2009

Precision Charm Decays: Leptonic, Semileptonic, Hadronic

Precision results on the leptonic, semileptonic, and hadronic decays of charm mesons are reviewed. These results are important for timely progress in weak flavor physics both in their own right and as checks of theoretical calculations. Recent years have seen much progress on weak decays of charm, in both theory and experiment, a trend we expect to continue.

hep-ex↗

arXiv2002

New CLEO Results for |V_cb| and |V_ub|

We report recent measurements from CLEO of the first two moments of the photon energy spectrum for b -> s gamma decays and the hadronic recoil mass in B -> X_c l nu. These physical quantities allow one to fix non-perturbative parameters occurring in calculations based on HQET and QCD. Predictions for semileptonic decay rates within this same framework depend in addition on the CKM matrix elements V_qq' governing quark mixing. We can thus extract |V_cb| from the inclusive semileptonic decay rate of B mesons, and |V_ub| from the lepton endpoint spectrum of B -> X_u l nu. Model dependence is reduced except for the assumption of quark-hadron duality. Finally, we update the classic measurement of |V_cb| from B -> D* l nu at zero recoil.

hep-ex↗