# A Study of $\Xi_c(2980)^+$ and $\Xi_c(3077)^+$

Abstract : We present a study of two states decaying to Lambda_c^+K^-pi^+ using the BaBar detector at the SLAC PEP-II asymmetric-energy e^+e^- storage rings. We use an integrated luminosity of 288.5 fb^{-1} collected at the center-of-mass energy sqrt{s} = 10.58 GeV, near the peak of the Upsilon(4S) resonance, plus 27.2 fb^{-1} collected approximately 40 MeV below this energy. We search for the particles Xi_{c}(2980)^+ and Xi_{c}(3077)^+, recently discovered by the Belle Collaboration, in their decays to Lambda_c^+K^-pi^+, where Lambda_c^+rightarrow pK^-pi^+. We find a signal with 7.0 sigma significance for the Xi_c(2980)^+ state with a mass difference with respect to the Lambda_c^+ of (680.6pm1.9pm1.0) MeV/c^2 (first error is statistical and second error is systematic). The measured width for this state is (23.6pm2.8pm1.3) MeV, and the yield is 284pm45pm46 events. We find a signal with 8.6 sigma significance for the Xi_c(3077)^+ state with a mass difference with respect to the Lambda_c^+ of (790.0pm0.7pm0.2) MeV/c^2, a width of (6.2pm1.6pm0.5) MeV, and a yield of 204pm35pm12 events. The Xi_{c}(2980)^+ is found to decay resonantly through the intermediate state Sigma_c(2455)^{++}K^- with 4.9 sigma significance and non-resonantly to Lambda_c^+K^-pi^+ with 4.1 sigma significance. With 5.8 sigma significance, the Xi_c(3077)^+ is found to decay resonantly through Sigma_c(2455)^{++}K^-, and with 4.6 sigma significance, it is found to decay through Sigma_c(2520)^{++}K^-. The significance of the signal for the non-resonant decay Xi_c(3077)^+rightarrow Lambda_c^+K^-pi^+ is 1.4 sigma. These results are preliminary.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00115430
Contributor : Dominique Girod <>
Submitted on : Tuesday, November 21, 2006 - 1:27:58 PM
Last modification on : Sunday, June 20, 2021 - 3:34:53 AM

### Citation

B. Aubert, R. Barate, M. Bona, D. Boutigny, F. Couderc, et al.. A Study of $\Xi_c(2980)^+$ and $\Xi_c(3077)^+$. XXXIII International Conference on High Energy Physics (ICHEP'06), Jul 2006, Moscow, Russia. ⟨in2p3-00115430⟩

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