The hidden strangeness mechanism in D+s → ωπ+ and D+s → ρ0π+ decays

被引：0
|
作者：
Fajfer, S [1 ]
Prapotnik, A
Singer, P
Zupan, J
机构：
[1] Univ Ljubljana, Dept Phys, SI-1001 Ljubljana, Slovenia
[2] Jozef Stefan Inst, SI-1001 Ljubljana, Slovenia
[3] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2005年 / 142卷
关键词：
D O I：
10.1016/j.nuclphysbps.2005.01.021
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We study possible contributions to the D-s(+) --> omega pi(+) and D-s(+) --> rho(o)pi(+) decay amplitudes. The D-s(+) --> omega pi(+) decay amplitude vanishes when naive factorization is used, while the D-s(+) --> rho(o)pi(+) decay amplitude arises due to the annihilation contribution. We find that amplitudes for both decays might be a result of the internal K, K* exchange. The D-s(+) --> omega pi(+) amplitude might obtain additional contributions from D-s(+) --> rho(+)eta(eta') re-scattering. The low experimental bound on the D-s(+) --> rho(o)pi(+) rate can be understood as a result of combination of the pi(1300) pole dominated annihilation contribution and the K, K* internal exchanges. The calculated branching fractions for D-s(+) - omega pi(+) and D-s(+) --> rho(o)pi(+) are in agreement with the current experimental results.
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页码：119 / 123
页数：5
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