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2 edition of Observation of charmed baryons in e+e- annihilations at 10GeV center of mass energy. found in the catalog.

Observation of charmed baryons in e+e- annihilations at 10GeV center of mass energy.

Henry Cornelus Josepp Seywerd

Observation of charmed baryons in e+e- annihilations at 10GeV center of mass energy.

by Henry Cornelus Josepp Seywerd

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  • 8 Currently reading

Published .
Written in English

    Subjects:
  • Physics Theses

  • Edition Notes

    Thesis (Ph.D.), Dept. of Physics, University of Toronto.

    ContributionsPrentice, J. D. (supervisor)
    The Physical Object
    Pagination122 leaves
    Number of Pages122
    ID Numbers
    Open LibraryOL20697097M

    DOUBLY CHARMED BARYONS Peter S. Cooper on behalf of the SELEX Collaboration Fermi National Accelerator Laboratory P.O. Box , MS , IL Abstract Candidates for several new high-mass states which include a cleanly-identified daughter baryon are . We present evidence from the CLEO detector for the charmed strange baryon c0. It is seen in nonresonant e+e- annihilations at s of GeV through its decay. The measured mass is © The American Physical Society. View on External Site.

    Thesis/Dissertation: Study of Charmed Baryon Sigma(C)() Production at the BaBar Experiment Title: Study of Charmed Baryon Sigma(C)() Production . The mass spectrum of charmed and bottom baryons has been computed on anisotropic lattices using quenched lattice nonrelativistic QCD. Masses are extracted by using mass splittings which are more accurate than masses obtained directly by using the.

    CLEO was a general purpose particle detector at the Cornell Electron Storage Ring (CESR), and the name of the collaboration of physicists who operated the detector. The name CLEO is not an acronym; it is short for Cleopatra and was chosen to go with CESR (pronounced Caesar). CESR was a particle accelerator designed to collide electrons and positrons at a center-of-mass energy of approximately. Apresent-day classification of charmed baryons is presented, a quark model for ground states is briefly described, and the energy levels of excited states are analyzed. In addition, a survey of experimentally observed states of charmed baryons is given.


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Observation of charmed baryons in e+e- annihilations at 10GeV center of mass energy by Henry Cornelus Josepp Seywerd Download PDF EPUB FB2

The charmed baryons Lambda_ {c} and Sigma_{c } have been observed using the ARGUS detector in the DORIS II e^{+}e ^{-} storage at DESY.

The ARGUS experiment is a 4pi magnetic solenoidal detector used to observe e^{+ }e^{-} annihilations in the center-of-mass energy region near 10GeV. The Lambda_{c} and its charge conjugate, were observed in three decay : Henry Cornelus Joseph Seywerd. Using the entire Belle data sample of fb⁻¹ of e⁺e⁻ collisions, we present the results of a study of excited Ωc charmed baryons in the decay mode Ξc⁺ K⁻.

We show confirmation of four of the five narrow states reported by the LHCb Collaboration: the Ωc(), Ωc(), Ωc(), and Ωc(). Observation of a Charmed Baryon Decaying to D0p at a Mass Near GeV/c2 the K-π+ and K-π+π-π+ decay modes of the D0 in fb-1 annihilation data recorded by the BABAR detector at a center-of-mass energy of GeV.

The mass and intrinsic width of the Λc()+ baryon and relative yield of the two baryons are also measured. The SELEX experiment (E) at Fermilab has observed two statistically compelling high mass states near GeV/c^2, decaying to Lambda_c+ K- pi+ and Lambda_c+ K- pi+ pi+.

These final states are Cabibbo-allowed decay modes of doubly charmed baryons. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Using data recorded by the CLEO-II detector at CESR, we report evidence of a pair of excited charmed baryons, one decaying into + c + and the other into + c \Gamma.

The doubly charged state has a measured mass difference M (+ c +) \Gamma M (+ c) of \Sigma \Sigma MeV and a width of + \Gamma3. Doubly Heavy Baryons Baryon spectroscopy is an important test for the Standard Model (SM) Charm doubly heavy baryons predicted include: Ξcc+(dcc), Ξcc++(ucc), and Ωcc+(scc) Theoretical predictions of Ξcc++ mass are GeV/c2 and expected to be close to Ξcc+[] Theoretical predictions of Ξcc++ lifetime are within the fs [].

We study bottomonium production in association with an η meson in e⁺e⁻ annihilations near the Υ(5 S), at a centre-of-mass energy of s= GeV.

Observation of excited Ω c charmed. We report the observation of a very high energy \gamma-ray source, whose position is coincident with HESS J This source has been observed for years by the ARGO-YBJ experiment from.

spectra (i.e., smaller values of P) than the L= 0 ground states, whereas the data for the ground state charmed baryons c and c show agreement with the lighter (by ˇ{ MeV) ground-state D and Dscharmed mesons. To some extent, the harder spectra of L=1 hadrons can be attributed to the fact that all the L= 1 charmed.

center-of-mass polar angle of the ˚meson or the forward ˆ0 meson, suggest production by two-virtual-photon annihilation. We present a preliminary study e+e!ccevents at p sˇGeV containing both a + c baryon and a c antibaryon. We nd roughly times the number of events expected if the leading charmed hadron types are uncorrelated.

We also calculate the spin-3 2 to spin-1 2 transition magnetic moments for the doubly bottomed baryons and charmed bottomed results are given in Table the charmed bottomed baryons, we use the subscript {b c} and [b c] to label the systems with symmetric and antisymmetry spin wave functions in the heavy quark sector, respectively.

It is very interesting to note. The observation of charmed‐strange baryons Ξ+c(née A+) and Ω0c (née T0) at the Cern‐SPS and Fermilab is discussed. Some questions about the production and decay of these particles are mentioned, and currently proposed experiments to address these questions are briefly presented.

There are 18 known charmed baryons, and four other candidates not well enough established to be promoted to the Summary Tables.∗ Fig. 1(a) shows the mass spectrum, and for comparison Fig.

1(b) shows the spectrum of the lightest strange baryons. The Λ c and Σ c spectra ought to look much like the Λ and Σ spectra, since a Λ c or a Σ. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of fb(-1), and confirmed in an additional sample of data collected at 8 TeV.

Observation of a charmed baryon decaying to D(0)p at a mass near GeV/c(2) for the K-π+ and K-π+π-π+ decay modes of the D0 in fb-1 annihilation data recorded by the BABAR detector at a center-of-mass energy of GeV.

of doubly charged partners. The mass and intrinsic width of the Λc()+ baryon and relative yield of. A peak in the pK-+ and p»K+- invariant-mass spectra at GeV/c2 is observed, which is associated with the lowest-lying charmed baryon (c). A cross section times branching ratio of nb at Ec.m.= GeV is measured with a substantial fraction of the events produced with an equal recoiling mass.

We present a study of excited charm-strange baryon states produced in e{sup +}e{sup -} annihilations at or near a center-of-mass energy of GeV, in a data sample with an integrated luminosity of fb{sup -1} recorded with the BABAR detector at the PEP-II e+e storage rings at the Stanford Linear Accelerator Center.

charmed baryons. 3 Techniques There are two main techniques that have been used in recent years for charmed baryons studies. Fixed target experiments, such as FOCUS, SELEX and E at Fermilab, have a long pathlength for charm decays which can be used as a tag, and also can yield accurate lifetime measurements.

Spectroscopy has tended to be. Topics include the total e + e − cross section, the properties of jet-like structure in high energy multi-particle events, the properties of the Ψ family of charmonium states, the production and properties of the charmed D mesons, and evidence for and the properties of the τ, a new charged lepton.

Abstract. Using data collected by the CLEO II detector, we have observed two states decaying to Λ + c π + ve to the Λ + c, their mass splittings are measured to be ++/+/ and ++/+/ MeV/c 2, respectively; this represents the first measurement of the less massive two states are consistent with being orbitally excited, isospin zero Λ + c states.

Doubly charmed baryons have been searched for by several experiments in the past decades. The SELEX collaboration reported the observation of the + cc baryon decaying into + c K ˇ and pD+K nal states [37,38], using a GeV/ccharged hyperon beam impinging on a xed target. The mass of the + cc baryon, averaged over the two decay.Observation is a complex research method because it often requires the researcher to play a number of roles and to use a number of techniques, including her/his fi ve senses, to collect data.

In addition, despite the level of involvement with the study group, the researcher must always remember.The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities.

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