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M. J. Charles

Publications and source records attributed to M. J. Charles.

10 recordsLinked to original sources
arXiv2015

The Physics of the B Factories

This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and data taking related issues. Part B discusses tools and methods used by the experiments in order to obtain results. The results themselves can be found in Part C. Please note that version 3 on the archive is the auxiliary version of the Physics of the B Factories book. This uses the notation alpha, beta, gamma for the angles of the Unitarity Triangle. The nominal version uses the notation phi_1, phi_2 and phi_3. Please cite this work as Eur. Phys. J. C74 (2014) 3026.

hep-ex↗
arXiv2014

CKM studies in the charm sector

A summary of recent progress in charm mixing and CP violation is presented, with a heavy bias towards experimental results.

hep-ex↗
arXiv2012

A search for time-integrated CP violation in D0 -> h- h+ decays

The preliminary results of a search for time-integrated CP violation in D0 -> h- h+ (h=K, pi) decays performed with 0.6 fb-1 of data collected by LHCb in 2011 are presented. The flavour of the charm meson is determined by the charge of the slow pion in the D*+ -> D0 pi+ and D*- -> D0bar pi- decay chains. The difference in CP asymmetry between D0 -> K- K+ and D0 -> pi- pi+, Delta ACP = ACP(K- K+) - ACP(pi- pi+), is measured to be Delta ACP = [ -0.82 +- 0.21 (stat.) +- 0.11 (syst.) ] %. This differs from the hypothesis of CP conservation by 3.5 sigma.

hep-ex↗
arXiv2010

Open charm and charmonium production at LHCb

We see copious production of charmed hadrons in the early LHCb data. The status and plans for charm production studies at LHCb are discussed, and preliminary signals are shown.

hep-ex↗
arXiv2009

Recent experimental results on charmed baryons

This paper summarizes recent experimental results on charmed baryons. Two main topics are covered: first, the spectroscopy of charmed baryon states; second, the production of charmed baryons in the decays of B mesons and from the e^+ e^- continuum.

hep-ex↗
arXiv2009

PFA Performance for SiD

A PFA has been developed for the SiD detector concept at a future Linear Collider. The performance of the version of this PFA used in the SiD LOI is presented for a number of physics processes with two hadronic jets. Presented at LCWS08.

physics.data-an↗
arXiv2009

Recent charm mixing results from BABAR, Belle, and CDF

A summary of the results of several recent studies of charm mixing is presented. A number of different methods were used, including the measurement of lifetime ratios for final states of different CP, time dependence of wrong-sign hadronic decays, fits to time-dependent Dalitz plots, and searches for wrong-sign semi-leptonic decays. Taken together, they suggest mixing is of order 1%. The status of searches for indirect CP violation is also reported.

hep-ex↗
arXiv2009

Implementation of Particle Flow Algorithm and Muon Identification

We present the implementation of the Particle Flow Algorithm and the result of the muon identification developed at the University of Iowa. We use Monte Carlo samples generated for the benchmark LOI process with the Silicon Detector design at the International Linear Collider. With the muon identification, an improved jet energy resolution, good muon efficiency and purity are achieved.

physics.ins-det↗
arXiv2004

Charm Decays at BABAR

The results of several studies of charmed mesons and baryons at BABAR are presented. First, searches for the rare decays D0 --> l+ l- are presented and new upper limits on these processes are established. Second, a measurement of the branching fraction of the isospin-violating hadronic decay Ds*(2112)+ --> Ds+ pi0 relative to the radiative decay Ds*(2112)+ --> Ds+ gamma is made. Third, the decays of DsJ*(2317)+ and DsJ(2460)+ mesons are studied and ratios of branching fractions are measured. Fourth, Cabibbo-suppressed decays of the Lambdac+ are examined and their branching fractions measured relative to Cabibbo-allowed modes. Fifth, the Xic0 is studied through its decays to Xi- pi+ and Omega- K+; in addition to measuring the ratio of branching fractions for Xic0 produced from the cc continuum, the uncorrected momentum spectrum is measured, providing clear confirmation of Xic0 production in B decays.

hep-ex↗