The ratio Φ → K + K − / K 0 K̄ 0
نویسندگان
چکیده
The ratio Φ → K + K − /K 0 ¯ K 0 is discussed and its present experimental value is compared with theoretical expectations. A difference larger than two standard deviations is observed. We critically examine a number of mechanisms that could account for this discrepancy, which remains unexplained. Measurements at DAΦNE at the level of the per mille accuracy can clarify whether there exist any anomaly.
منابع مشابه
The Φ → K 0 K̄ 0 γ decay
The scalar contributions to the radiative decay φ → KK̄γ are studied within the framework of the Linear Sigma Model. Theoretical predictions for the associated subprocesses φ → f0γ and φ → a0γ as well as the ratio φ → f0γ/a0γ are also given. PACS. 12.39.-x – 11.30.Rd – 13.40.Hq – 13.75.Lb
متن کاملx / 06 06 04 9 v 2 2 8 Ja n 20 07 K ∗ 0 and φ Meson Production in Proton - Nucleus Interactions at √ s = 41 . 6
The inclusive production cross sections of the strange vector mesons K, K ∗0 , and φ have been measured in interactions of 920GeV protons with C, Ti, and W targets with the HERA-B detector at the HERA storage ring. Differential cross sections as a function of rapidity and transverse momentum have been measured in the central rapidity region and for transverse momenta up to pT = 3.5GeV/c. The at...
متن کاملSymmetry Be Tested With K 0 vs K̄ 0 → π + π − π 0 Decays ?
We show that the CP-violating effect in K vs K̄ → πππ decays differs from that in KL → π π, KL → π π or the semileptonic KL transitions, if there exists CPT violation in K-K̄ mixing. A delicate measurement of this difference in the KTeV experiment and at the φ factory will provide a new test of CPT symmetry in the neutral kaon system. PACS number(s): 11.30. Er, 13.25. Es, 14.40. Aq Typeset using ...
متن کاملA Finiteness Theorem for Canonical Heights Attached to Rational Maps over Function Fields
Let K be a function field, let φ ∈ K(T ) be a rational map of degree d ≥ 2 defined over K, and suppose that φ is not isotrivial. In this paper, we show that a point P ∈ P(K̄) has φ-canonical height zero if and only if P is preperiodic for φ. This answers affirmatively a question of Szpiro and Tucker, and generalizes a recent result of Benedetto from polynomials to rational functions. We actually...
متن کاملThe Numerical Exergy Analysis of H2/Air Combustion with Detailed Chemical Kinetic Simulation Model
Energy and exergy concepts come from thermodynamics laws and are applicable to all fields of science and engineering. This study considers numerical simulations of combustion of hydrogen with air in a constant pressure environment and exergy terms according to first and second laws analysis using homemade code. Chemical kinetic model includes 20 reactions and 9 species. At the first stage of p...
متن کامل