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Creator:

Urbanowski Krzysztof

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Abstract:

This paper begins with a discussion of the general form and general CP- and CPT- transformation properties of the Lee-Oehme-Yang (LOY) effective Hamiltonian for the neutral kaon complex. Next, the properties of the exact effective Hamiltonian determined by the properties of the exact transition amplitudes for this complex are discussed. Using the Khalfin Theorem we show that contrary to the standard result of the LOY theory, the diagonal matrix elements of the effective Hamiltonian governing the time evolution in the subspace of states of an unstable particle and its antiparticle need not be equal at for t > t0 (t0 is the instant of creation of the pair) when the total system under consideration is CPT invariant but CP noninvariant. The unusual consequence of this result is that, contrary to the properties of stable particles, the masses of the unstable particle “1” and its antiparticle “2” need not be equal for t o t0 in the case of preserved CPT and violated CP symmetries. We also show that there exists an approximation which is more accurate than the LOY, and which leads to an effective Hamiltonian whose diagonal matrix elements posses properties consistent with the conclusions for the exact effective Hamiltonian described above.

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application/pdf

Resource Identifier:

oai:lib.psnc.pl:583

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Subject and keywords:

approximate methods, Weisskopf-Wigner approximation, CPT symmetry, neutral kaons

Object collections:

PSNC Institutional Repository > Computational Methods in Science and Technology

PSNC Institutional Repository > Computational Methods in Science and Technology > 2005

PSNC Institutional Repository > Computational Methods in Science and Technology > 2005 > Volume 11(1)2005

Last modified:

Jul 31, 2014

In our library since:

May 26, 2014

Number of object content hits:

122

All available object's versions:

https://lib.psnc.pl/publication/686

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Volume 11(1) 2005

Edition name	Date
CPT and effective Hamiltonians for neutral kaon and similar complexes	Jul 31, 2014

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