Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Dass, G. V."'
Autor:
Dass, G. V., Grimus, W.
Publikováno v:
Phys.Rev. D67 (2003) 037901
We generalize a theorem by Khalfin, originally derived for the states $| F_1 > = | M^0>$, $| F_2 > = |\bar M^0>$, where $M^0$ is a neutral flavoured meson (e.g., $K^0$ or $B_d^0$), by assuming CPT invariance. Dispensing with CPT invariance and allowi
Externí odkaz:
http://arxiv.org/abs/hep-ph/0205258
Autor:
Dass, G. V., Grimus, W.
We focus on two aspects of CPT invariance in neutral-meson--antimeson ($M^0 \bar M^0$) mixing: 1. Tests of CPT invariance, using only the property of ``lack of vacuum regeneration'', which occurs as a part of the well-known Lee--Oehme--Yang (LOY) the
Externí odkaz:
http://arxiv.org/abs/hep-ph/0203043
Autor:
Dass, G. V., Grimus, W.
Publikováno v:
Phys.Lett. B521 (2001) 267-272
We phenomenologically decompose the Weisskopf--Wigner approximation, as applied to the neutral flavoured meson complexes, into three pieces and propose tests for these pieces. Our tests hold for general decay amplitudes and $M^0$--$\bar M^0$ mixing p
Externí odkaz:
http://arxiv.org/abs/hep-ph/0109049
Publikováno v:
JHEP 0102:044,2001
We consider the decays of a correlated neutral-meson--antimeson state with C-parity +1. We show that there is CPT noninvariance in the mixing of the neutral mesons if, for any two decay modes f and g, the decay rate has a component R_A which is antis
Externí odkaz:
http://arxiv.org/abs/hep-ph/0012131
Autor:
Dass, G. V., Grimus, W.
Publikováno v:
Phys.Rev. D61 (2000) 116006
We discuss 2-particle correlations which arise in the time evolution of C-odd and C-even meson--antimeson states of flavoured neutral mesons. In order to keep our discussion general, we do not use the Weisskopf -- Wigner approximation. Possible devia
Externí odkaz:
http://arxiv.org/abs/hep-ph/9912545
Autor:
Dass, G. V., Sarma, K. V. L.
Publikováno v:
Eur.Phys.J.C5:283-286,1998
We study the EPR correlation implied by the entangled wavefunction of the $B^0\bar{B}^0$ pair created by the $\Upsilon $(4S) resonance. The analysis uses the basis provided by the mass eigenstates $B_1,B_2$ rather than the flavour states $B^0, \bar{B
Externí odkaz:
http://arxiv.org/abs/hep-ph/9709249
Autor:
Dass, G. V., Sarma, K. V. L.
Publikováno v:
Mod.Phys.Lett.A13:2937-2944,1998
Extraction of the mass difference $\Delta m$ from $B^0\bar B^0$ oscillations involves tagging of bottom flavour at production and at decay. We show that the asymmetry between the unmixed and mixed events factorizes into two parts, one depending on th
Externí odkaz:
http://arxiv.org/abs/hep-ph/9705350
Autor:
Dass, G. V., Sarma, K. V. L.
Publikováno v:
Phys.Lett. B421 (1998) 289-294
Correlations that signal direct CP violation in the bottom sector are suggested. They need data on $Z\to b\bar b$ events which consist of a bottom hadron decay into an exclusive semileptonic channel $h \ell \nu $ (where $h$ is a hadron), and the othe
Externí odkaz:
http://arxiv.org/abs/hep-ph/9705215
Autor:
Dass, G. V., Sarma, K. V. L.
We estimate the product of the relative strength of the $\Delta B = -\Delta Q$ amplitude in the decay $B_d^0 \rightarrow D^{*} \ell \bar \nu_{\ell }$ and the width-difference parameter $y$. For this we have used the data on time-dependence of $B_{d}^
Externí odkaz:
http://arxiv.org/abs/hep-ph/9610466
Autor:
Dass, G. V., Sarma, K. V . L.
Publikováno v:
Phys.Rev.D54:5880-5882,1996
In order to detect the possible presence of $\Delta B = - \Delta Q$ amplitudes in neutral $B$ meson decays, we consider the measurement of decay time asymmetries involving like-sign dilepton events at the $B$ factories.
Comment: 5 pages, latex,
Comment: 5 pages, latex,
Externí odkaz:
http://arxiv.org/abs/hep-ph/9607274