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21 papers · 1 filter
On L. Schwartz's boundedness condition for kernels
T. Constantinescu, A. Gheondea
In previous works we analysed conditions for linearization of hermitian kernels. The conditions on the kernel turned out to be of a type considered previously by L. Schwartz in the…
Simultaneous Measurement of the B0 Meson Lifetime and Mixing Frequency with B0 --> D*- l+ nu Decays
the BABAR Collaboration, B. Aubert
We measure the B0 lifetime τ_{B0} and the B0-B0bar oscillation frequency Δm_d with a sample of approximately 14,000 exclusively reconstructed B0 --> D*- l+ nu signal events, select…
Measurement of the B0 meson lifetime with partial reconstruction of B0 --> D*- pi+ and B0 --> D*- rho+ decays
The BABAR Collaboration, B. Aubert
The neutral meson lifetime is measured with the data collected by the BaBar detector at the PEP-II storage ring during the years 1999 and 2000, with a total integrated luminosi…
Constructive control of quantum systems using factorization of unitary operators
S. G. Schirmer, A. D. Greentree, V. Ramakrishna +1
We demonstrate how structured decompositions of unitary operators can be employed to derive control schemes for finite-level quantum systems that require only sequences of simple c…
Low Scale String Unification and the Highest Energy Cosmic Rays
William S. Burgett, G. Domokos, S. Kovesi-Domokos
String unification at a scale of a few tens of TeV explains the existence of cosmic ray interactions beyond the Greisen-Zatsepin-Kuzmin (GZK) cutoff. Trans-GZK cosmic rays are neut…
A Measurement of the B0 -> J/psi pi+pi- Branching Fraction
B. Aubert
We present a measurement of the branching fraction for the decay of the neutral meson into the final state . The data set contains approximately 56 million $B\bar{B}…
A Measurement of Psi(2S) Resonance Parameters
BES Collaboration, J. Z. Bai
Cross sections for e+e- to hadons, pi+pi- J/Psi, and mu+mu- have been measured in the vicinity of the Psi(2S) resonance using the BESII detector operated at the BEPC. The Psi(2S) t…
Psi(2S) two- and three-body hadronic decays
BES Collaboration, J. Z. Bai
We report measurements of branching fractions for psi(2S) decays into omega pi pi, b1 pi,omega f2(1270),omega KK, omega p pbar, phi pi pi, phi f0(980),phi KK, and an upper limit fo…
Measurement of the Branching Fraction for Inclusive Semileptonic B Meson Decays
B. Aubert
A largely model-independent measurement of the inclusive electron momentum spectrum and branching fraction for semileptonic decays of B mesons is presented based on data recorded a…
Simultaneous Measurement of the B0 Meson Lifetime and Mixing Frequency with B0 --> D*- l+ nu_l Decays
B. Aubert, The BABAR Collaboration
We measure the B0 lifetime tau_B0 and the B-Bbar oscillation frequency Deltam_d with a sample of approximately 14,000 exclusively reconstructed B0 -> D*- l+ nu_l signal events, sel…
Measurements of Branching Fractions and CP-violating Asymmetries in B0->pi+ pi-, K+ pi-, K+ K- Decays
The BABAR Collaboration, B. Aubert
We present measurements of branching fractions and CP-violating asymmetries for neutral B meson decays to two-body final states of charged pions and kaons based on a sample of abou…
Measurement of the CP-Violating Asymmetry Amplitude sin2beta
B. Aubert
We present results on time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 88 million Y(4S) --> B Bbar…
Designing Multi-Commodity Flow Trees
Samir Khuller, Balaji Raghavachari, Neal E. Young
The traditional multi-commodity flow problem assumes a given flow network in which multiple commodities are to be maximally routed in response to given demands. This paper consider…
A Network-Flow Technique for Finding Low-Weight Bounded-Degree Spanning Trees
S. Fekete, S. Khuller, M. Klemmstein +2
The problem considered is the following. Given a graph with edge weights satisfying the triangle inequality, and a degree bound for each vertex, compute a low-weight spanning tree…
Balancing Minimum Spanning and Shortest Path Trees
Samir Khuller, Balaji Raghavachari, Neal E. Young
This paper give a simple linear-time algorithm that, given a weighted digraph, finds a spanning tree that simultaneously approximates a shortest-path tree and a minimum spanning tr…
Approximating the Minimum Equivalent Digraph
Samir Khuller, Balaji Raghavachari, Neal E. Young
The MEG (minimum equivalent graph) problem is, given a directed graph, to find a small subset of the edges that maintains all reachability relations between nodes. The problem is N…
On Strongly Connected Digraphs with Bounded Cycle Length
Samir Khuller, Balaji Raghavachari, Neal Young
The MEG (minimum equivalent graph) problem is, given a directed graph, to find a small subset of the edges that maintains all reachability relations between nodes. The problem is N…
Measurement of the Branching Fraction and CP Content for the Decay B0 --> D*+ D*-
The BaBar Collaboration, B. Aubert
We report a measurement of the branching fraction of the decay B^0 --> D^{*+} D^{*-} and of the CP-odd component of its final state using the BaBar detector. With data correspondin…
Search for T and CP Violation in B0-anti-B0 Mixing with Inclusive Dilepton Events
B. Aubert
We report the results of a search for T and CP violation in B0-anti-B0 mixing using an inclusive dilepton sample collected by the BaBar experiment at the PEP-II B Factory. The asym…
Measurement of the B0 Lifetime with Partially Reconstructed B0 --> D*- l+ nu Decays
The BABAR Collaboration, B. Aubert
The B0 lifetime has been measured with a sample of 23 million BBbar pairs collected by the BaBar detector at the PEP-II e+e- storage ring during 1999 and 2000. Events from the semi…
Search for the Rare Decays B --> Kl^+l^- and B --> K^*l^+l^-
B. Aubert et al
We present results from a search for the flavor-changing neutral current decays and , where is either an or $μ^+μ…