Charmed Baryon Lambda Subscript C Decays With A Sigma In The Final State And Decay Asymmetry Parameters

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Charmed Baryon Lambda Subscript C Decays With A Sigma In The Final State And Decay Asymmetry Parameters

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Author : Song Yang
language : en
Publisher:
Release Date : 1993

Charmed Baryon Lambda Subscript C Decays With A Sigma In The Final State And Decay Asymmetry Parameters written by Song Yang 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.

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 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.

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.

Inclusive Charmed Baryon Lambda C And Sigma C Production In B Meson Decays

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Author : Michael Manfred Zoeller
language : en
Publisher:
Release Date : 1994

Inclusive Charmed Baryon Lambda C And Sigma C Production In B Meson Decays written by Michael Manfred Zoeller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.

Measurements Of The Properties Of Lambda C 2595 Lambda C 2625 Sigma C 2455 And Sigma C 2520 Baryons

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Author :
language : en
Publisher:
Release Date : 2011

Measurements Of The Properties Of Lambda C 2595 Lambda C 2625 Sigma C 2455 And Sigma C 2520 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 2011 with categories.

We report measurements of the resonance properties of [Lambda]c(2595)+ and [Lambda]c(2595)+ baryons in their decays to [Lambda]c+[pi]+[pi]- as well as [Sigma]c(2455)++,0 and [Sigma]c(2455)++,0 baryons in their decays to [Lambda]c+[pi]± final states. These measurements are performed using data corresponding to 5.2 fb-1 of integrated luminosity from pp̄ collisions at √s = 1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. Exploiting the largest available charmed baryon sample, we measure masses and decay widths with uncertainties comparable to the world averages for [Sigma]c states, and significantly smaller uncertainties than the world averages for excited [Lambda]c+ states.

Search For Semileptonic Decays In The B Meson Into The Lambda Subscript C Baryon

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Author : Tomohiko Tanabe
language : en
Publisher:
Release Date : 2009

Search For Semileptonic Decays In The B Meson Into The Lambda Subscript C Baryon written by Tomohiko Tanabe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

Strange Decays Of Nonstrange Baryons

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Author :
language : en
Publisher:
Release Date : 1998

Strange Decays Of Nonstrange 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 1998 with categories.

The strong decays of excited nonstrange baryons into the final states [Lambda]K, [Sigma]K, and for the first time into [Lambda](1405)K, [Lambda](1520)K, [Sigma](1385)K, [Lambda]K{sup *}, and [Sigma]K{sup *}, are examined in a relativized quark pair creation model. The wave functions and parameters of the model are fixed by previous calculations of N[pi] and N[pi][pi], etc., decays. The results show that it should be possible to discover several new negative parity excited baryons and confirm the discovery of several others by analyzing these final states in kaon production experiments. They also establish clear predictions for the relative strengths of certain states to decay to [Lambda](1405)K and [Lambda](1520)K, which can be tested to determine if a three-quark model of the [Lambda](1405)K is valid. The authors results compare favorably with the results of partial wave analyses of the limited existing data for the [Lambda]K and [Sigma]K channels. They do not find large [Sigma]K decay amplitudes for a substantial group of predicted and weakly established negative-parity states, in contrast to the only previous work to consider decays of these states into the strange final states [Lambda]K and [Sigma]K.

Observation Of Exclusive B Decays To Final States Containing A Charmed Baryon

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Author :
language : en
Publisher:
Release Date : 2003

Observation Of Exclusive B Decays To Final States Containing A Charmed Baryon 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 collected in the region of the[Upsilon](4S) resonance with the CLEO-II detector, they report on the first observation of exclusive decays of the B meson to final states with a charmed baryon. They have measured the branching fractions[Beta](B[sup -][yields][Lambda][sub c][sup+][bar p][pi][sup -])= (0.62[sub -0.20][sup+0.23][+-] 0.11[+-] 0.10) x 10[sup -3] and[Beta]([bar B][sup 0][yields][Lambda][sub c][sup+][bar p][pi][sup+][pi][sup -])= (1.33[sub -0.42][sup+0.46][+-] 0.31[+-] 0.21) x 10[sup -3]. In addition, they report upper limits for final states of the form[bar B][yields][Lambda][sub c][sup+][bar p](n[pi]) and[Lambda][sub c][sup+][bar p](n[pi])[pi][sup 0] where (n[pi]) denotes up to four charged pions.

Study Of The Decay Asymmetry Parameter And Cp Violation Parameter In The Lambda C Lambda Pi Decay

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Author :
language : en
Publisher:
Release Date : 2005

Study Of The Decay Asymmetry Parameter And Cp Violation Parameter In The Lambda C Lambda Pi Decay written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter a{sub?{sub c}} in?{sub c} → {Lambda}?+ decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter? {triple_bond} a{sub {Lambda}{sub c}} + a{sub {ovr {Lambda}{sub c}}}/a{sub {Lambda}{sub c}} - a{sub {ovr {Lambda}{sub c}}}. We obtain a{sub {Lambda}{sub c}} = -0.78 ± 0.16 ± 0.13 and? = -0.07 ± 0.19 ± 0.12 where errors are statistical and systematic.