A Cross Section Measurement Of Charm Hyperons Xi Sub C Sup And Xi Sub C Sup 0 In 250 Gev P K Pi Nucleon Interactions

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A Cross Section Measurement Of Charm Hyperons Xi Sub C Sup And Xi Sub C Sup 0 In 250 Gev P K Pi Nucleon Interactions

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Author :
language : en
Publisher:
Release Date : 2001

A Cross Section Measurement Of Charm Hyperons Xi Sub C Sup And Xi Sub C Sup 0 In 250 Gev P K Pi Nucleon Interactions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

Fermilab Experiment 769 used a charge-selected, hadron beam of mean energy 250 GeV/c, composed of pions, kaons, and protons, impinging on beryllium, aluminum, copper and tungsten targets. Using a sample of approximately 4000[Xi][sub s][sup[minus]][yields][Lambda][sup 0][pi][sup[minus]] decays, measurements of the charm baryon forward cross sections times branching ratio[pi][sup[+-]]N[yields][Xi][sub c][sup+]X and[pi][sup[+-]]N[yields][Xi][sub c][sup 0]X are presented. Upper limits on[alpha] x BR are also determined for the states[Xi][sub c][sup+][yields][Xi][sub s][sup[minus]][pi][sup+][pi][sup+] and[Xi][sub c][sup 0][yields][Xi][sub s][sup[minus]][pi][sup+] produced in (p, [pi][sup+], [pi][sup[minus]], K[sup+], K[sup[minus]])-nucleon interactions.

A Cross Section Measurement Of Charm Hyperons Xi Atop C And Xi 0 Atop C In 250 Gev P K Pi Nucleon Interactions

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Author :
language : en
Publisher:
Release Date : 1995

A Cross Section Measurement Of Charm Hyperons Xi Atop C And Xi 0 Atop C In 250 Gev P K Pi Nucleon Interactions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.

Fermilab Experiment 769 used a charge-selected, hadron beam of mean energy 250 GeV/c, composed of pions, kaons, and protons, impinging on beryllium, aluminum, copper and tungsten targets. Using a sample of approximately 4000 [Xi]$-\atop{s}$ 2![Lambda]0[pi]- decays, measurements of the charm baryon forward cross sections times branching ratio [pi]±N 2![Xi]$+\atop{c}$X and [pi]±N 2![Xi]$0\atop{c}$X are presented. Upper limits on [alpha] x BR are also determined for the states [Xi]$+\atop{c}$ 2![Xi]$-\atop{s}$[pi]+[pi]+ and [Xi]$0\atop{c}$ 2![Xi]$-\atop{s}$[pi]+ produced in (p, [pi]+, [pi]-, K+, K- )-nucleon interactions.

A Cross Section Measurement Of Charm Hyperons Sub C And Sub C In 250 Gev P K Nucleon Interactions

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Author :
language : en
Publisher:
Release Date : 1995

A Cross Section Measurement Of Charm Hyperons Sub C And Sub C In 250 Gev P K Nucleon Interactions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.

Fermilab Experiment 769 used a charge-selected, hadron beam of mean energy 250 GeV/c, composed of pions, kaons, and protons, impinging on beryllium, aluminum, copper and tungsten targets. Using a sample of approximately 4000?{sub s}− →?°?− decays, measurements of the charm baryon forward cross sections times branching ratio?{sup {+-}}N →?{sub c}X and?{sup {+-}}N →?{sub c}°X are presented. Upper limits on? x BR are also determined for the states?{sub c}+ →?{sub s}−?+?+ and?{sub c}° →?{sub s}−?+ produced in (p,?+,?−, K+, K−)-nucleon interactions.

A Cross Section Measurement Of Charm Hyperons Xi Positive And Xi Neutral In 250 Gev P K Pi Nucleon Interactions

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Author : Juan Francisco Astorga-Vergara
language : en
Publisher:
Release Date : 1995

A Cross Section Measurement Of Charm Hyperons Xi Positive And Xi Neutral In 250 Gev P K Pi Nucleon Interactions written by Juan Francisco Astorga-Vergara and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Hyperons categories.

A Cross Section Measurement Of Charm Hyperons E And E0 In 250 Gev P

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Author :
language : en
Publisher:
Release Date : 1995

A Cross Section Measurement Of Charm Hyperons E And E0 In 250 Gev P written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.

Search For Charm In 250 Gev C Pi Sup P Interactions

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Author :
language : en
Publisher:
Release Date : 1975

Search For Charm In 250 Gev C Pi Sup P Interactions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.

A study was made of the reaction $pi$$sup -$ + p at 250 GeV/c in order to search for charmed particles. Cross sections, effective mass distributions, and an upper limit for each decay mode were found. However, no evidence was found for charmed particles. (JFP).

Cross Section Measurements For Charm Production By 209 Gev Muons

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Author :
language : en
Publisher:
Release Date : 1980

Cross Section Measurements For Charm Production By 209 Gev Muons written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.

Interactions of 209-GeV muons in the Multimuon Spectrometer at Fermilab have yielded 20072 dimuon final states, with (81±10)% attributed to production of charmed states decaying to muons. The cross section for diffractive charm muoproduction is 6.9{sub -1.4}{sup +1.9} nb. Extrapolated to Q2 =0, the effective cross section for 178(100)-GeV photons is 750{sup +180}−130 (560{sup +200}−130) nb, too small to explain the high-energy rise in the photon-nucleon total cross section.

Cross Section Measurements For Charm Production By Muons And Photons

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Author :
language : en
Publisher:
Release Date : 1980

Cross Section Measurements For Charm Production By Muons And Photons written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.

Interactions of 209-GeV muons in the Multimuon Spectrometer at Fermilab have yielded 20072 dimuon final states, with (81±10)% attributed to production of charmed states decaying to muons. The cross section for diffractive charm muoproduction is 6.9{sub -1.4}{sup +1.9} nb. Extrapolated to Q2 =0, the effective cross section for 178(100)-GeV photons is 750{sup +180}130 (560{sup +200}−130) nb, too small to explain the high-energy rise in the photon-nucleon total cross section.

Hyperon Production Asymmetries In 500 Gev C Pion Nucleus Interactions

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Author :
language : en
Publisher:
Release Date : 2001

Hyperon Production Asymmetries In 500 Gev C Pion Nucleus Interactions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

We present a preliminary study from Fermilab experiment E791 of[Lambda][sup 0]/[anti[Lambda]][sup 0], [Xi][sup -]/[Xi][sup+] and[Omega][sup -]/[Omega][sup+] production asymmetries from[pi][sup -] nucleus interactions at 500 Gev/c. The production asymmetries for these particles are studied as a function of x[sub F] and p[sup 2][sub T]. We observed an asymmetry in the target fragmentation region for[Lambda][sup 0]'s larger than that for[Xi]'s, suggesting diquark effects. The asymmetry for[Omega]'s is significatively smaller than for the other two hyperons consistent with the fact that[Omega]'s do not share valence quarks with either the pion or the target particle. In the beam fragmentation region, the asymmetry tends to 0.1 for both[Lambda][sup 0]'s and[Xi]'s. The asymmetries vs p[sup 2][sub T] are approximately constant for the three strange baryons under study.

The Beauty And Charm Production Cross Sections In 250 Gev C Pion Nucleon Interactions

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Author :
language : en
Publisher:
Release Date : 1993

The Beauty And Charm Production Cross Sections In 250 Gev C Pion Nucleon Interactions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.

By determining the production cross sections for heavy flavor hadrons, we test the theoretical predictions from perturhative quantum chroma-dynamics (QCD). In the case of pion induced beauty production, the few published results do not resolve the issue of the applicability of perturbative QCD. This analysis is undertaken in order to help resolve this situation. We determine the total beauty and charm production cross sections using an analysis of single electron decay products. We extract the cross sections per nucleon from the two-dimensional distribution of electron p versus impact parameter (d) to the primary vertex. We place an upper limit on the beauty production cross section of [sigma]b$\bar{b}$