Studies Of Charmed Baryons Decaying To Lambda C N Pi

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Inis Atomindex

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Author :
language : en
Publisher:
Release Date : 1988

Inis Atomindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Nuclear energy categories.

Studies Of Charmed Baryons Decaying To Lambda C N Pi

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Author : Jiu Zheng
language : en
Publisher:
Release Date : 1999

Studies Of Charmed Baryons Decaying To Lambda C N Pi written by Jiu Zheng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Baryons categories.

Observation Of Two Excited Charmed Baryons Decaying Into Lambda C Pi

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Author :
language : en
Publisher:
Release Date : 2003

Observation Of Two Excited Charmed Baryons Decaying Into Lambda C Pi written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

Using data recorded by the CLEO-II detector at CESR, we report evidence of a pair of excited charmed baryons, one decaying into[Lambda][sub c][sup+][pi][sup+] and the other into[Lambda][sub c][sup+][pi][sup -]. The doubly charged state has a measured mass difference M([Lambda][sub c][sup+][pi][sup+]) - M([Lambda][sub c][sup+]) of 234.5[+-] 1.1[+-] 0.8 MeV and a width of 17.9[sub -3.2][sup+3.8][+-] 4.0 MeV, and the neutral state has a measured mass difference M([Lambda][sub c][sup+][pi][sup -]) - M([Lambda][sub c][sup+]) of 232.6[+-] 1.0[+-] 0.8 MeV and a width of 13.0[sub -3.0][sup+3.7][+-] 4.0 MeV. We identify these states as[Sigma]*[sub c][sup++] and[Sigma]*[sub c][sup 0], the spin 3/2[sup+] excitations of the[Sigma][sub c] baryons.

A Study Of The Decay Properties Of The Charmed Baryon Charmed Positive Lambda Baryon

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Author : C.E.K. Charlesworth
language : en
Publisher:
Release Date : 1992

A Study Of The Decay Properties Of The Charmed Baryon Charmed Positive Lambda Baryon written by C.E.K. Charlesworth and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.

The charmed baryon $\Lambda\sbsp{c}{+}$ has been observed using the ARGUS detector in the DORIS II $e\sp{+}e\sp-$ storage ring at DESY. The ARGUS experiment is a 4$\pi$ magnetic solenoidal detector used to observe $e\sp{+}e\sp-$ annihilations at center-of-mass energies around 10.4 GeV. We have studied 5 decays modes of the $\Lambda\sbsp{c}{+}$. The decay mode $\Lambda\sbsp{c}{+}\to pK\sp-\pi\sp+$ was used to measure the $\Lambda\sbsp{c}{+}$ fragmentation properties. A value of 0.24 $\pm$ 0.04 was found for the Peterson et al. parameter $\epsilon$, and the $\sigma(\Lambda\sbsp{c}{+}$) $\cdot\ BR(\Lambda\sbsp{c}{+}\to pK\sp-\pi\sp+$) was measured to be 12.0 $\pm$ 1.1 $\pm$ 1.3) pb. The decay modes $\Lambda\sbsp{c}{+}\to\Lambda\pi\sp+$ and $\Lambda\sbsp{c}{+}\to\Sigma\sp0\pi\sp+$ were also studied. In the former the asymmetry parameter $\alpha\sb{\Lambda\sb{c}}$ was measured to be $-$1.0 $\pm$ 0.5, indicating that parity is maximally violated in this decay. The two production cross section times branching ratios were measured to be (2.2 $\pm$ 0.3 $\pm$ 0.3) pb and (2.0 $\pm$ 0.7 $\pm$ 0.3) pb respectively. Finally, a search was made for evidence of W-exchange in the decay $\Lambda\sbsp{c}{+}\to\Xi\sp-K\sp+\pi\sp+$. This final state can arise through a simple spectator decay or via the more exotic W-exchange decay into $\Xi\sp{*0}K\sp+$, where the $\Xi\sp{*0}$ subsequently decays into $\Xi\sp-\pi\sp+$. The two body rate was measured to be (35 $\pm$ 17)% of the three body rate, indicating that a significant portion of the $\Xi\sp-K\sp+\pi\sp+$ final state may occur via W-exchange.

Observation Of A Charmed Baryon Decaying To D0 P At A Mass Near 2 94 Gev C2

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Author : B. Aubert
language : en
Publisher:
Release Date : 2006

Observation Of A Charmed Baryon Decaying To D0 P At A Mass Near 2 94 Gev C2 written by B. Aubert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

A search for charmed baryons decaying to D{sup 0}p reveals two states: the {Lambda}{sub c}(2880){sup +} baryon and a previously unobserved state at a mass of [2939.8 {+-} 1.3 (stat.) {+-} 1.0 (syst.)] MeV/c{sup 2} and with an intrinsic width of [17.5 {+-} 5.2 (stat.) {+-} 5.9 (syst.)] MeV. Consistent and significant signals are observed for the K{sup -}{pi}{sup +} and K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +} decay modes of the D{sup 0} in 287 fb{sup -1} annihilation data recorded by the BABAR detector at a center-of-mass energy of 10.58 GeV. There is no evidence in the D{sup +}p spectrum of doubly-charged partners. The mass and intrinsic width of the {Lambda}{sub c}(2880){sup +} baryon and relative yield of the two baryons are also measured.

Production And Decay Of The Lambda C Charmed Baryon From Fermilab E791

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Author :
language : en
Publisher:
Release Date : 2001

Production And Decay Of The Lambda C Charmed Baryon From Fermilab E791 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.

Results are presented for the 500 GeV/c pion production asymmetry and polarization of the [Lambda]{sub c} ({bar [Lambda]}{sub c}) charmed baryon from Fermilab experiment E791. An analysis of the decay to the p{bar K}[pi] final state is described. Resonant sub-channel fractions and phases are given and possible resonant effects in the low mass p{bar K} system discussed. Significant decay to {Lambda}{sub c} → [Delta]2K− establishes for the first time the importance of a W exchange mechanism in charmed baryon decay.

First Observation Of Doubly Charmed Baryons

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Author :
language : en
Publisher:
Release Date : 2003

First Observation Of Doubly Charmed Baryons written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

The SELEX experiment (E781) at Fermilab has observed two statistically compelling high mass states near 3.6 GeV/c[sup 2], decaying to[Lambda][sub c][sup+] K[sup -][pi][sup+] and[Lambda][sub c][sup+] K[sup -][pi][sup+][pi][sup+]. These final states are Cabibbo-allowed decay modes of doubly charmed baryons[Xi][sub cc][sup+] and[Xi][sub cc][sup++], respectively. The masses are in the range expected from theoretical considerations, but the spectroscopy is surprising. SELEX also has weaker preliminary evidence for a state near 3.8 GeV/c[sup 2], a high mass state decaying to[Lambda][sub c][sup+] K[sup -][pi][sup+][pi][sup+], possibly an excited[Xi][sub cc][sup++] (ccu*). Data are presented and discussed.

First Observation Of A Family Of Double Charm Baryons

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Author :
language : en
Publisher:
Release Date : 2002

First Observation Of A Family Of Double Charm Baryons written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.

The SELEX experiment (E781) at Fermilab has candidates for high mass states decaying to[Lambda][sub c][sup+]K[sup -][pi][sup+] and[Lambda][sub c][sup+]K[sup -] pi[sup+][pi][sup+], Cabibbo-allowed decay modes of doubly-charmed baryons[Xi][sub cc][sup+] and[Xi][sub cc][sup++]. The masses are consistent with theoretical considerations, but the spectroscopy is surprising. Limited lifetime information suggests that[tau][sub[Xi][sub cc][sup++]][approx][tau][sub Xi][sub cc][sup+].

Charmed Baryon Decays Observed In Ee Annihilation At Spear

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Author :
language : en
Publisher:
Release Date : 1981

Charmed Baryon Decays Observed In Ee Annihilation At Spear written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with categories.

Various weak decays of the charmed baryon ..lambda../sub c/ are observed in the Mark II detector at the SLAC ee− storage ring SPEAR. Hadronic decays ..lambda../sub c/ ..-->.. pK−..pi..+ and ..lambda../sub c/+ ..-->.. pK/sub s/° and their conjugates are observed as peaks in invariant mass spectra at m(..lambda../sub c/) = (2286 +- 6) MeV/c2. An estimate of the charmed baryon production cross section, sigma(..lambda../sub c/) + sigma (anti ..lambda../sub c/) = (1.7 +- 0.4) nb, derived from Mark II measurements of the inclusive baryon cross sections R/sub p/ and R/sub ..lambda../ as functions of center-of-mass energy, is used to calculate branching ratios for these hadronic decays: BR (..lambda../sub c/+ ..-->.. p K− ..pi..+) = (2.0 +- 0.8)%; BR (..lambda../sub c//sup +/ ..-->.. p k/sub s/°)/BR (..lambda../sub c//sup +/ ..-->.. p K− ..pi../sup +/) = (36 +- 16)%. An attempt is also made to observe higher mass charmed baryons by reconstructing cascade decays ..sigma../sub c/ ..-->.. ..lambda../sub c/..pi ... Evidence for the observation of semileptonic decays of the charmed baryon is presented. Direct electrons are observed in events containing antiprotons, lambdas and antilambdas. The number of electrons per baryon event, after background subtraction and efficiency correction, is used, together with an estimate of the charmed baryon content of proton and lambda events, to calculate inclusive and semi-inclusive semileptonic branching ratios of the ..lambda../sub c.

Weak Decays Of The Charmed Baryon C Subscript O And The Inclusive Yield Of Lambda And P

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Author : J. G. Körner
language : en
Publisher:
Release Date : 1978

Weak Decays Of The Charmed Baryon C Subscript O And The Inclusive Yield Of Lambda And P written by J. G. Körner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with categories.