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Showing 1 to 20 of 499 for “"Decays"”.
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Nonleptonic decays of charm mesons
Amplitude analyses of the $D\sp{+}$, $D\sbsp{s}{+}\ \to\ K\sp{+}K\sp{-}\pi\sp{+}$ and $D\sp{+}$, $D\sbsp{s}{+}\ \to\ \pi\sp{+}\pi\sp{+}\pi\sp{-}$ Dalitz plots are presented using data collected by the Fermilab high energy photoproduction experiment E687. Our data are fit to a model consisting of a …
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Four-body semileptonic decays of D mesons
Submitted by Carolyn Rauber (crauber2@illinois.edu) on 2012-01-20T18:29:01Z No. of bitstreams: 1 1993_culbertson.pdf: 4021258 bytes, checksum: 20c8b29e5b491da7cac693bfa4beef66 (MD5)
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Search for supersymmetric particles from Z decays
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Effective field theories for inclusive B decays
In this thesis, we study inclusive decays of the B meson. These allow one to determine CKM elements precisely and to search for physics beyond the Standard Model. We use the framework of effective field theories, in particular the Soft-Collinear Effective Theory, which is a suitable method when the …
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CP-violation in cascade decays at the LHC
… effects. We analytically calculate the cascade decays including the relevant spin correlations to compute the parton level asymmetry. In addition, we use Monte Carlo simulations to estimate the sensitivity of the LHC to the CP-violating observables. Due to large boosts that dilute the …
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Studies of the Semileptonic Decays of D Mesons
… branching ratios and decay distributions for the decays D+ → K¯ *0ℓ+nuℓ. We observe an asymmetry in the K¯*0 angular decay distribution that we interpret as evidence for a previously unobserved s-wave K-pi+ amplitude that interferes with the K¯*0. These measurements are …
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Search for semileptonic decays of photoproduced charmed mesons
… data on a similar search for semi1eptonic decays of charmed baryons.
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Search for CP violation in D-meson decays
Using data from the Mark III detector at the $e\sp+e\sp-$ storage ring at SPEAR, an upper limit of.30 at the 90% confidence level is set on the magnitude of the CP asymmetry $A\sb{cp}$ for the CP eigenstate $D\sp0\to K\sp+K\sp-.$ This falls within the preexisting limit of.45 @ 90% CL set by FNAL …
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Search for CP violation in D-meson decays
Using data from the Mark III detector at the e+e- storage ring at SPEAR, an upper limit of .30 at the 90% confidence level is set on the magnitude of the CP asymmetry Acp for the CP eigenstate no -+ K+ K-. This falls within the preexisting limit of .45 @90% CL set by FNAL experiment E691 using the …
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"Non- D`D decays of the y"" (3770)"
"A search for inclusive non-D D decays of the '1'""(3770) is performed in a sample of 9.56±0.48 pb-1 collected by the Mark III detector at the SPEAR storage ring, at the Stanford Linear Accelerator Center. To be more specific, a search for inclusive p, A, and c)l decay modes of the '1'""(3770) is …
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Doubly charmed B decays with the LHCb experiment
… of $CP$ violation with doubly charmed $B$ decays. Both were performed using Run I data collected by the LHCb experiment in $pp$ collisions at the LHC. This corresponds to 1.0 fb$^{-1}$ collected at a centre-of-mass energy of 7 TeV and 2.0 fb$^{-1}$ collected at a centre-of-mass energy of 8 …
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Model-independent approaches to QCD and B decays
… the soft-collinear effective theory (SCET), to B decays with energetic hadrons in the final state. SCET separates perturbative interactions at the scales mb and ... from hadronic physics at AQCD by expanding in ratios of these scales. After a review of SCET, we construct a complete …
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Direct measurement of the decays of charmed D mesons
Charmed D mesons produced in the decay of the t/1(3770) are observed by the Mark III detector at SPEAR. A new technique is applied to these data to derive D branching fractions which do not rely on the measurement of D production cross sections. Measurements are presented for three decay modes of …
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Lattice QCD determination of weak decays of B mesons
This thesis uses a variety of numerical and statistical techniques to perform high precision calculations in high energy physics using quantum field theory. It introduces the experimental motivation for the calculation of B meson form factors and includes a discussion of previous work. It then …
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Measurement of neutral meson production in hadronic Z decays
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
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Analysis of B Meson Decays to Three Charged Pions
Decays of B mesons to three-body charmless final states probe the properties of the weak interaction through their dependence on the complex quark couplings in the CKM matrix. They also test dynamical models for hadronic B decays. Based on a sample of 772 million BB pairs collected by the Belle …
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Search For Cp Violation In Singly Cabibbo-Suppressed Charm Decays
… in singly Cabibbo-Suppressed (SCS) weak decays of charged D mesons is predicted in the Standard Model (SM) to have asymmetries on the order of $10^{-3}$. $CP$ violation has not yet been observed in the Charm sector; however, the BaBar experiment now has extremely large data samples of …
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Studies of the inclusive semileptonic decays of the b-hadrons
<p>A detailed description of a new analysis, in which the correlation of the electric charge of the b-quark to that of the lepton is utilized to isolate different decay modes of the b-hadrons, is presented. Using the data collected by the DELPHI detector during the 1994 and 1995 data-taking …
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Weak decays of beautiful pseudoscalar mesons with Lattice Quantum Chromodynamics
Weak decays of beautiful mesons can be used to probe the validity of our best model of particle physics: the Standard Model. In this thesis, I use specialised techniques to overcome practical challenges associated with the large mass of valence $b$ quarks to study a selection of decays of $B$ …
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