Journal articles
Search for new $π^0$-like particles produced in association with a $τ$-lepton pair
J. P. Lees
1
V. Poireau
1
V. Tisserand
1
N. Arnaud
M. Davier
2
D. Derkach
2
G. Grosdidier
2
F. Le Diberder
2
A. M. Lutz
2
B. Malaescu
2
P. Roudeau
2
A. Stocchi
2
G. Wormser
2
G. Wormser 2
Author
1
LAPP - Laboratoire d'Annecy de Physique des Particules (9 Chemin de Bellevue - BP 110 - 74941 Annecy-le-Vieux CEDEX - France - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- USMB [Université de Savoie] [Université de Chambéry] - Université Savoie Mont Blanc (27, rue Marcoz - 73000 Chambéry - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5814 (France)
2
LAL - Laboratoire de l'Accélérateur Linéaire (Centre Scientifique d'Orsay B.P. 34 91898 ORSAY Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8607 (France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
Abstract : We report on a search in e+e− annihilations for new π0-like particles produced in association with a τ-lepton pair. These objects, with a similar mass and similar decay modes to π0 mesons, could provide an explanation for the non-asymptotic behavior of the pion-photon transition form factor observed by the Babar Collaboration. No significant signal is observed, and limits on the production cross section at the level of 73 fb or 370 fb, depending on the model parameters, are determined at 90% confidence level. These upper limits lie below the cross section values needed to explain the Babar form factor data.
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Journal articles
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http://hal.in2p3.fr/in2p3-01081900
Contributor : Sabine Starita <>
Submitted on : Wednesday, November 12, 2014 - 10:35:20 AM
Last modification on : Friday, November 6, 2020 - 3:27:46 AM
Contributor : Sabine Starita <>
Submitted on : Wednesday, November 12, 2014 - 10:35:20 AM
Last modification on : Friday, November 6, 2020 - 3:27:46 AM
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- HAL Id : in2p3-01081900, version 1
- DOI : 10.1103/PhysRevD.90.112011
- ARXIV : 1411.1806
Citation
J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Search for new $π^0$-like particles produced in association with a $τ$-lepton pair
. Physical Review D, American Physical Society, 2014, 90 (11), pp.UNSP 112011. ⟨10.1103/PhysRevD.90.112011⟩. ⟨in2p3-01081900⟩
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