Study of the Exclusive Initial-State Radiation Production of the D anti-D System

Aubert, Bernard; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Tisserand, V.; Zghiche, A.

doi:10.1103/PhysRevD.76.111105

Study of the Exclusive Initial-State Radiation Production of the D anti-D System

BaBar

Collaboration

Jul, 2006

15 pages

Part of Proceedings of the 33rd International Conference on High Energy Physics (ICHEP '06) : Moscow, Russia, July 26-August 2, 2006

Published in:

Phys.Rev.D 76 (2007) 111105

Contribution to:

- ICHEP 2006

e-Print:

hep-ex/0607083 [hep-ex]

DOI:

10.1103/PhysRevD.76.111105

PDG:

{{\mathit \psi}{(3770)}}

\rightarrow

{{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}

Report number:

SLAC-PUB-11983,
BABAR-CONF-06-33,
BABAR-CONF-06-033

Experiments:

SLAC-PEP2-BABAR

View in:

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Abstract:

A study of exclusive production of the

D \bar D

system through initial-state r adiation is performed in a search for charmonium states, where

D=D^0

or

D^+

. The

D^0

mesons are reconstructed in the

D^0 \to K^- \pi^+

,

D^0 \to K^- \pi^+ \pi^0

, and

D^0 \to K^- \pi^+ \pi^+ \pi^-

decay modes. The

D^+

is reconstructed through the

D^+ \to K^- \pi^+ \pi^+

decay mode. The analysis makes use of an integrated luminosity of 288.5 fb

^{-1}

collected by the BaBar experiment. The

D \bar D

mass spectrum shows a clear

\psi(3770)

signal. Further structures appear in the 3.9 and 4.1 GeV/

c^2

regions. No evidence is found for Y(4260) decays to

D \bar D

, implying an up per limit \frac{\BR(Y(4260)\to D \bar D)}{\BR(Y(4260)\to J/\psi \pi^+ \pi^-)} < 7.6 (95 % confidence level).

Note:

15 pages, 5 postscript figues, submitted to ICHEP2006 Report-no: BABAR-CONF-06/33, SLAC-PUB-11983

13.25.Ft
14.40.Lb
12.40.Yx

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