On the decays π0→νν′

doi:10.1016/0370-2693(81)90102-7

Physics Letters B

Volume 100, Issue 4, 9 April 1981, Pages 347-350

https://doi.org/10.1016/0370-2693(81)90102-7 Get rights and content

Abstract

Phenomenological aspects of π⁰→νν′ are considered. From the existing experimental information, we deduce an upper limit $Γ(π^{0} →νν′) Γ(π^{0} → all) < 2.4 × 10^{−5} (90% c.l.)$ . Possible mechanisms which can give rise to this process are discussed. Branching ratios of the order of 10⁻⁶ for decays into the known neutrinos (ν_e, ν_μ) are found possible. Rates comparable to the experimental limit for decays into final states involving additional neutrinos (massive or massless) cannot be ruled out.

References (17)

B. Kayser et al.
Phys. Lett.
(1974)
R.L. Kingsley et al.
Phys. Rev.
(1974)
U. Camerini et al.
Phys. Rev. Lett.
(1969)
D. Ljung et al.
Phys. Rev.
(1973)
S. Weinberg
Trans. N.Y. Acad. Sci.
(1977)
G.L. Kane
Could Higgs bosons be before LEP?
L.-F. Li
Properties of Higgs particles
S. Wolfram
Nucl. Phys.
(1976)
E. Fischbach
Phys. Rev.
(1977)
M.A. Bég et al.
Phys. Rev.
(1978)
T. Kalogeropoulos et al.
Phys. Lett.
(1979)
J.H. Klems et al.
Phys. Rev.
(1971)
G.D. Cable et al.
Phys. Rev.
(1973)
S. Weinberg
Phys. Rev. Lett.
(1967)
A. Salam

There are more references available in the full text version of this article.

Cited by (24)

The decay π<sup>0</sup>→γvv as a probe of the τ-neutrino magnetic moment
1992, Physics Letters B
Rare muon and pion decays
1989, Nuclear Physics B (Proceedings Supplements)
Neutral pion decays probe new physics beyond the standard model
1988, Nuclear Physics, Section B
We study the decay π⁰ → γ + unobservable particles. The observation of such a process would give unambiguous evidence for the existence of a new light gauge boson of the type predicted by a number of current models. It is shown that the decay rate of the production of such a boson can be experimentally interesting. The contribution of the background processes (π⁰ → γ + scalars, π⁰ → γ + fermions) is proved to be negligibly small.
A new limit for the branching ratio for the decay π<sup>0</sup> → νν′ from beam-dump experiments
1988, Physics Letters B
If the decay π⁰ → νν′ exists, it would be a source of prompt neutrinos that would emerge from a beam dump. The data from several beam-dump experiments are examined for evidence of this decay and new upper limits, $gG(π^{0} → ν_{e} g ̄ n_{e} /gG(gpsu0$ → all) <3.1 × 10⁻⁶, $Γ(π^{0} → ν_{μ} g ̄ n_{μ})/Γ(π^{0} → all) <3.1 × 10^{−6} and Γ(π^{0} → ν_{τ} g ̄ n_{τ} /Γ(π^{0} → all) <2.1 × 10^{−6} (all 90% CL)$ are derived.
Search for a light photino in neutral pion decay
1987, Physics Letters B
Electromagnetic decays of light mesons
1985, Physics Reports
The new data on the electromagnetic decays of “light” mesons are analyzed. Special attention is paid to rare electromagnetic leptonic decays of the type $A → B l^{+} l^{−}$ and to ways of using these processes for extracting information on the transition form factors of neutral mesons. Data on electromagnetic lepton processes of higher order, such as $P → l^{+} l^{−}$ and $P ′ → P l^{+} l^{−}$ , are also analyzed and we discuss present prospects for such investigations.

View all citing articles on Scopus

^☆: Work supported by the US Department of Energy.

View full text

Radiation tolerant optoelectronics for high energy physics
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 1052, 2023, Article 168208
Jan Troska, …, Anthony Weidberg
Radiation-hard ASICs for data transmission and clock distribution in High Energy Physics
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 1053, 2023, Article 168364
Paulo Moreira, Szymon Kulis
High-precision calculation of the 4-loop contribution to the electron g-2 in QED
Physics Letters B, Volume 772, 2017, pp. 232-238
Stefano Laporta
On the decay rate of Chebyshev coefficients
Applied Numerical Mathematics, Volume 113, 2017, pp. 44-53
Hassan Majidian
Single production of vectorlike Y quarks at the HL-LHC
Nuclear Physics B, Volume 973, 2021, Article 115580
V. Cetinkaya, …, O. Cakir
On the decay rate for the wave equation with viscoelastic boundary damping
Journal of Differential Equations, Volume 265, Issue 6, 2018, pp. 2793-2824
Reinhard Stahn

On the decays π0→νν′☆

Abstract

Phys. Lett.

Phys. Rev.

Phys. Rev. Lett.

Phys. Rev.

Trans. N.Y. Acad. Sci.

Nucl. Phys.

Phys. Rev.

Phys. Rev.

Phys. Lett.

Phys. Rev.

Phys. Rev.

Phys. Rev. Lett.

On the decays π⁰→νν′☆