Toward an improved search for neutron-antineutron oscillations

被引：8

作者：

Snow, W. M. ^{[1
]}

机构：

[1] Indiana Univ, Cyclotron Facil, Bloomington, IN 47408 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2009年 / 611卷 / 2-3期

关键词：

Neutron oscillations; Baryon asymmetry; Baryon number violation; B-L symmetry; BARYON ASYMMETRY; GLOBAL CHARGES; DECAYS; NONCONSERVATION; VIOLATION; UNIVERSE;

D O I：

10.1016/j.nima.2009.07.049

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An observation of neutron-antineutron oscillations would constitute a discovery of fundamental importance for particle physics and cosmology. The required change in baryon number and lepton number (Delta B = 2, Delta L = 0) relates neutron-anti neutron oscillations to neutrinoless double beta decay (Delta B = 0, Delta L = 2) and the physics of B-L symmetry breaking and neutrino mass generation in several theories beyond the Standard Model which unify quarks and leptons. Recent theoretical models which posit new energy scales for B-L symmetry breaking in the ranges from 10(5) to 10(11) GeV can produce neutron-antineutron oscillations close to the existing limits. We mention recent developments in cold and ultracold neutron technology which can make possible improvements in the sensitivity to the free neutron oscillation probability by factors from approximate to 100 to 1000. For these sensitivities a null result would place the most stringent limit on this possible mode of matter instability. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：144 / 148

页数：5

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