The KL-KS mass difference

Johan Bijnens; Jean Marc Gérard; Gerhard Klein

doi:10.1016/0370-2693(91)90880-Y

The K_L-K_S mass difference

Johan Bijnens, Jean Marc Gérard, Gerhard Klein

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

Abstract

The matching of the log and short distance contributions to the K_L-K_S mass difference is investigated in the large N_c limit (N_c being the number of colours). In this limit a physically well defined separation between the two regimes exists. This allows for an investigation of the matching between the two contributions. We obtain that 0.8±0.1 of the observed mass difference is due to the light and charm quarks contribution. An estimate of the top and top-charm contributions is also given.

Original language	English
Pages (from-to)	191-195
Number of pages	5
Journal	Physics Letters B
Volume	257
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(91)90880-Y
Publication status	Published - 1991 Mar 21
Externally published	Yes

Subject classification (UKÄ)

Subatomic Physics

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10.1016/0370-2693(91)90880-Y

Cite this

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abstract = "The matching of the log and short distance contributions to the KL-KS mass difference is investigated in the large Nc limit (Nc being the number of colours). In this limit a physically well defined separation between the two regimes exists. This allows for an investigation of the matching between the two contributions. We obtain that 0.8±0.1 of the observed mass difference is due to the light and charm quarks contribution. An estimate of the top and top-charm contributions is also given.",

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AB - The matching of the log and short distance contributions to the KL-KS mass difference is investigated in the large Nc limit (Nc being the number of colours). In this limit a physically well defined separation between the two regimes exists. This allows for an investigation of the matching between the two contributions. We obtain that 0.8±0.1 of the observed mass difference is due to the light and charm quarks contribution. An estimate of the top and top-charm contributions is also given.

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The K_L-K_S mass difference

Abstract

Subject classification (UKÄ)

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