Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'506'133
Articles rated: 2609

27 April 2024

» arxiv » hep-ex/0206058

Article overview

Is the Unitarity of the quark-mixing-CKM-matrix violated in neutron $eta$-decay?
H.Abele ; M.Astruc Hoffmann ; S.Baessler ; D.Dubbers ; F. Glück ; U.Müller ; V.Nesvizhevsky ; J.Reich ; O.Zimmer ;
Date:	24 Jun 2002
Journal:	Phys.Rev.Lett. 88 (2002) 211801
Subject:	hep-ex
Abstract:	We report on a new measurement of neutron $eta$-decay asymmetry. From the result linebreak $A_0$ = -0.1189(7), we derive the ratio of the axial vector to the vector coupling constant $lambda$ = ${it g_A/g_V}$ = -1.2739(19). When included in the world average for the neutron lifetime $ au$ = 885.7(7)s, this gives the first element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix $V_{ud} $. With this value and the Particle Data Group values for $V_{us}$ and $V_{ub}$, we find a deviation from the unitarity condition for the first row of the CKM matrix of $Delta$ = 0.0083(28), which is 3.0 times the stated error.
Source:	arXiv, hep-ex/0206058
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap