The weak pion-nucleon vertex revisited

Norbert Kaiser; Ulf G. Meissner

doi:10.1016/0375-9474(88)90115-7

The weak pion-nucleon vertex revisited

Norbert Kaiser
, Ulf G. Meissner

University of Regensburg
Center for Theoretical Physics

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

We evaluate the parity-violating weak pion-nucleon vertex in the framework of a chiral soliton model including pions and the vector mesons ρ and ω. The weak πN coupling constant >G_π is enhanced by a factor of 13.3 for the standard electro-weak model as compared to the Cabbibo model, with its absolute value given by G_π ≈ 2.7 · 10^-8. We compare our results to available data and other theoretical determinations. In particular, we predict the γ-asymmetry in ¹⁸F to be |P(¹⁸F)|= 1.2 · 10^-4. We also discuss calculational differences to standard quark model estimates.

Original language	English
Pages (from-to)	671-682
Number of pages	12
Journal	Nuclear Physics, Section A
Volume	489
Issue number	4
DOIs	https://doi.org/10.1016/0375-9474(88)90115-7
State	Published - 5 Dec 1988
Externally published	Yes

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@article{0866b853ac554138ba903511305a42f0,

title = "The weak pion-nucleon vertex revisited",

abstract = "We evaluate the parity-violating weak pion-nucleon vertex in the framework of a chiral soliton model including pions and the vector mesons ρ and ω. The weak πN coupling constant >Gπ is enhanced by a factor of 13.3 for the standard electro-weak model as compared to the Cabbibo model, with its absolute value given by Gπ ≈ 2.7 · 10-8. We compare our results to available data and other theoretical determinations. In particular, we predict the γ-asymmetry in 18F to be |P(18F)|= 1.2 · 10-4. We also discuss calculational differences to standard quark model estimates.",

author = "Norbert Kaiser and Meissner, \{Ulf G.\}",

note = "Funding Information: l This work is supported in part by funds provided by the U.S. Department of Energy (D.O.E.) contract \#DE-AC02-76ER03069, and BMFT grant MEP 0234 REA. l * Present address: Niels Bohr Institute, Blegdamsvej 17, DK-2100 Kebenhavn 0, Denmark.",

year = "1988",

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doi = "10.1016/0375-9474(88)90115-7",

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journal = "Nuclear Physics, Section A",

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TY - JOUR

T1 - The weak pion-nucleon vertex revisited

AU - Kaiser, Norbert

AU - Meissner, Ulf G.

N1 - Funding Information: l This work is supported in part by funds provided by the U.S. Department of Energy (D.O.E.) contract #DE-AC02-76ER03069, and BMFT grant MEP 0234 REA. l * Present address: Niels Bohr Institute, Blegdamsvej 17, DK-2100 Kebenhavn 0, Denmark.

PY - 1988/12/5

Y1 - 1988/12/5

N2 - We evaluate the parity-violating weak pion-nucleon vertex in the framework of a chiral soliton model including pions and the vector mesons ρ and ω. The weak πN coupling constant >Gπ is enhanced by a factor of 13.3 for the standard electro-weak model as compared to the Cabbibo model, with its absolute value given by Gπ ≈ 2.7 · 10-8. We compare our results to available data and other theoretical determinations. In particular, we predict the γ-asymmetry in 18F to be |P(18F)|= 1.2 · 10-4. We also discuss calculational differences to standard quark model estimates.

AB - We evaluate the parity-violating weak pion-nucleon vertex in the framework of a chiral soliton model including pions and the vector mesons ρ and ω. The weak πN coupling constant >Gπ is enhanced by a factor of 13.3 for the standard electro-weak model as compared to the Cabbibo model, with its absolute value given by Gπ ≈ 2.7 · 10-8. We compare our results to available data and other theoretical determinations. In particular, we predict the γ-asymmetry in 18F to be |P(18F)|= 1.2 · 10-4. We also discuss calculational differences to standard quark model estimates.

UR - https://www.scopus.com/pages/publications/0001581247

U2 - 10.1016/0375-9474(88)90115-7

DO - 10.1016/0375-9474(88)90115-7

M3 - Article

AN - SCOPUS:0001581247

SN - 0375-9474

VL - 489

SP - 671

EP - 682

JO - Nuclear Physics, Section A

JF - Nuclear Physics, Section A

IS - 4

ER -

The weak pion-nucleon vertex revisited

Abstract

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