UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Direct CP violating asymmetry in B-0 -> K+pi(-) decays

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, JM; Hicheur, A; Karyotakis, Y; ... BaBar Collaboration; + view all (2004) Direct CP violating asymmetry in B-0 -> K+pi(-) decays. PHYS REV LETT , 93 (13) , Article 131801. 10.1103/PhysRevLett.93.131801. Green open access

[thumbnail of 1303678.pdf]
Preview
PDF
1303678.pdf

Download (792kB)

Abstract

We present a measurement of the direct CP violating asymmetry in the decay B-0-->K(+)pi(-) using a data sample of 227x10(6) Y(4S)-->B (B) over bar decays ollected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We observe a total signal yield of n(K)(-)pi(+)+n(K)(+)pi(-)=1606+/-51 decays and measure the asymmetry (n(K)(-)pi(+)-n(K)(+)pi(-))/(n(K)(-)pi(+)+n(K)(+)pi(-))=-0.133+/-0.030(stat)+/-0.009(syst). The probability of observing such an asymmetry in the absence of direct CP violation is 1.3x10(-5), corresponding to 4.2 standard deviations.

Type: Article
Title: Direct CP violating asymmetry in B-0 -> K+pi(-) decays
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.93.131801
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.93.131801
Language: English
Additional information: The American Physical Society
Keywords: NEUTRAL KAON
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1303678
Downloads since deposit
50Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item