Medium effects of low energy pions

E. Friedman

Medium effects of low energy pions

E. Friedman^*

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

Fits of pion-nucleus potentials to large sets of pionic atom data reveal departures of parameter values from the corresponding free πN parameters. These medium effects can be quantitatively reproduced by a chiral-motivated model where the pion decay constant is modified in the medium or by including the empirical on-shell energy dependence of the amplitudes. No consistency is obtained between pionic atoms and the free πN interaction when an extreme off-shell chiral model is used. The role of the size of data sets is briefly discussed.

Original language	English
Pages (from-to)	979-989
Number of pages	11
Journal	Acta Physica Polonica B
Volume	35
Issue number	3
State	Published - Mar 2004
Event	XXVIII Mazurian Lakes Conference on Physics: Atomic Nucleus as a Laboratory for Fundamental Processes - Krzyze, Poland Duration: 31 Aug 2003 → 7 Sep 2003

Cite this

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title = "Medium effects of low energy pions",

abstract = "Fits of pion-nucleus potentials to large sets of pionic atom data reveal departures of parameter values from the corresponding free πN parameters. These medium effects can be quantitatively reproduced by a chiral-motivated model where the pion decay constant is modified in the medium or by including the empirical on-shell energy dependence of the amplitudes. No consistency is obtained between pionic atoms and the free πN interaction when an extreme off-shell chiral model is used. The role of the size of data sets is briefly discussed.",

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year = "2004",

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language = "אנגלית",

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journal = "Acta Physica Polonica B",

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AB - Fits of pion-nucleus potentials to large sets of pionic atom data reveal departures of parameter values from the corresponding free πN parameters. These medium effects can be quantitatively reproduced by a chiral-motivated model where the pion decay constant is modified in the medium or by including the empirical on-shell energy dependence of the amplitudes. No consistency is obtained between pionic atoms and the free πN interaction when an extreme off-shell chiral model is used. The role of the size of data sets is briefly discussed.

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T2 - XXVIII Mazurian Lakes Conference on Physics: Atomic Nucleus as a Laboratory for Fundamental Processes

Y2 - 31 August 2003 through 7 September 2003

ER -

Medium effects of low energy pions

Abstract

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