Upper limits on <span class="math"><math><mtext>D</mtext><msup><mi></mi><mn>0</mn></msup><mtext>-</mtext><mtext>D</mtext><msup><mi></mi><mn>0</mn></msup></math></span> mixing and <span class="math"><math><mtext>B</mtext><mtext>B</mtext></math></span> production from muon-nucleon scattering期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Upper limits on $D^{0} - D^{0}$ mixing and $B B$ production from muon-nucleon scattering

Authors:	A.C. Benvenuti D. Bollini G. Bruni T. Camporesi G. Heiman L. Monari F.L. Navarria A. Argento M. Bozzo H. Gennow M. Goosens W.-D. Nowak L. Piemontese G. Vesztergombi R. Voss S.P. Baranov D.Yu. Bardin N.G. Fadeev M. Virchaux

Affiliation:	Dipartimento di Fisica dell''Università and INFN, Bologna, Italy;CERN, Geneva, Switzerland;Joint Institute for Nuclear Research, Dubna, USSR

Abstract:	In deep inelastic interactions of 200 GeV muons with a carbon target, we have found 17 events of the type μ^±N→μ^±μ^?μ^?X (“wrong-sign” dimuons). We derive upper limits of 1.2% (90% CL) on $D^{0} - D^{0}$ transitions (mixing) or, alternatively, of 9 pb (90% CL) cross section for $B B$ pair production as possible sources of such events.

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