Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
In the broad band neutral beam at Fermilab, a search for photoproduction of charmed D mesons was done using photons of 100 to 300 GeV. The reaction considered was ..gamma.. + Be ..-->.. DantiD + X, leptons + ..., K°/sub s/n..pi../sup +-/. No statistically significant evidence for D production is observed based on the K°/sub s/n..pi../sup +-/ mass spectrum. The sensitivity of the search is commensurate with theoretical estimates of sigma(..gamma..p ..-->.. DantiD + X) approximately 500 nb, however this is dependent on branching ratios and photoproduction models. Data are given on a similar search for semileptonic decays of charmed baryons. 48 references.
Search for Semileptonic Decays of Photoproduced Charmed Mesons. [100 to 300 GeV, No Statistically Significant Evidence].
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
In the broad band neutral beam at Fermilab, a search for photoproduction of charmed D mesons was done using photons of 100 to 300 GeV. The reaction considered was ..gamma.. + Be ..-->.. DantiD + X, leptons + ..., K°/sub s/n..pi../sup +-/. No statistically significant evidence for D production is observed based on the K°/sub s/n..pi../sup +-/ mass spectrum. The sensitivity of the search is commensurate with theoretical estimates of sigma(..gamma..p ..-->.. DantiD + X) approximately 500 nb, however this is dependent on branching ratios and photoproduction models. Data are given on a similar search for semileptonic decays of charmed baryons. 48 references.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
In the broad band neutral beam at Fermilab, a search for photoproduction of charmed D mesons was done using photons of 100 to 300 GeV. The reaction considered was ..gamma.. + Be ..-->.. DantiD + X, leptons + ..., K°/sub s/n..pi../sup +-/. No statistically significant evidence for D production is observed based on the K°/sub s/n..pi../sup +-/ mass spectrum. The sensitivity of the search is commensurate with theoretical estimates of sigma(..gamma..p ..-->.. DantiD + X) approximately 500 nb, however this is dependent on branching ratios and photoproduction models. Data are given on a similar search for semileptonic decays of charmed baryons. 48 references.
Energy Research Abstracts
Energy Research Abstracts
Search for Semileptonic Decays of Photoproduced Charmed Mesons
Author: Richard Neal Coleman
Publisher:
ISBN:
Category : Mesons
Languages : en
Pages : 128
Book Description
Publisher:
ISBN:
Category : Mesons
Languages : en
Pages : 128
Book Description
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 750
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 750
Book Description
INIS Atomindex
The Properties of Semileptonic Decays of Charmed D Mesons
Author: Daniel Mark Coffman
Publisher:
ISBN:
Category : Mesons
Languages : en
Pages : 240
Book Description
Publisher:
ISBN:
Category : Mesons
Languages : en
Pages : 240
Book Description
Analysis of Semileptonic Decays of B Mesons and D Mesons
Author: Kenneth Arthur Bloom
Publisher:
ISBN:
Category :
Languages : en
Pages : 584
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 584
Book Description
Semileptonic Decays of B Mesons Into Excited Charm Mesons
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 293
Book Description
We use the heavy quark effective theory to investigate the form factors that describe the semileptonic decays of a B meson into excited daughter mesons. For an excited daughter meson with charm, a single form factor is needed at leading order, while five form factors and two dimensionful constants are needed to order 1/m(sub)c in the heavy quark expansion. For non-charmed final states, a total of four form factors are needed at leading order. For the process B ->D^(*)Xlv, four form factors are also needed at leading order.
Publisher:
ISBN:
Category :
Languages : en
Pages : 293
Book Description
We use the heavy quark effective theory to investigate the form factors that describe the semileptonic decays of a B meson into excited daughter mesons. For an excited daughter meson with charm, a single form factor is needed at leading order, while five form factors and two dimensionful constants are needed to order 1/m(sub)c in the heavy quark expansion. For non-charmed final states, a total of four form factors are needed at leading order. For the process B ->D^(*)Xlv, four form factors are also needed at leading order.
Non-Standard Physics in Leptonic and Semileptonic Decays of Charmed Mesons
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
Book Description
Recent measurements of the branching fraction for D{sub s} → lv disagree with the Standard Model expectation, which relies on calculations of f{sub D{sub s}} from lattice QCD. This paper uses recent preliminary measurements from CLEO and a new preliminary lattice-QCD result from this conference to update the significance of the discrepancy. The 'f{sub D{sub s}} puzzle' stands now at 3.5[sigma], with [sigma] predominantly from the statistical uncertainty of the experiments. New physics scenarios that could solve the puzzle would also lead to non-Standard amplitudes mediating the semileptonic decays D → Klv. This paper shows where the new amplitudes enter the differential rate and outlines where lattice QCD calculations are needed to confront recent and forthcoming measurements.
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
Book Description
Recent measurements of the branching fraction for D{sub s} → lv disagree with the Standard Model expectation, which relies on calculations of f{sub D{sub s}} from lattice QCD. This paper uses recent preliminary measurements from CLEO and a new preliminary lattice-QCD result from this conference to update the significance of the discrepancy. The 'f{sub D{sub s}} puzzle' stands now at 3.5[sigma], with [sigma] predominantly from the statistical uncertainty of the experiments. New physics scenarios that could solve the puzzle would also lead to non-Standard amplitudes mediating the semileptonic decays D → Klv. This paper shows where the new amplitudes enter the differential rate and outlines where lattice QCD calculations are needed to confront recent and forthcoming measurements.