Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Sehgal, L. M."'
Autor:
Berger, Ch., Sehgal, L. M.
Publikováno v:
Phys.Rev. D86 057901 2012
We have previously studied the time-dependence of a B anti B meson mixture in terms of its density matrix. The requirement that the absolute value of the Stokes vector zeta(t) should evolve monotonically from its initial value zeta(0)=0 to its final
Externí odkaz:
http://arxiv.org/abs/1207.1462
Autor:
Berger, Ch., Sehgal, L. M.
Publikováno v:
Phys.Rev.D83:037901,2011
In a previous publication we noted that the time dependence of an incoherent $B^0-\bar{B}^0$ mixture undergoes a qualitative change when the magnitude of CP violation $\delta$ exceeds a critical value. Requiring, on physical grounds, that the system
Externí odkaz:
http://arxiv.org/abs/1007.2996
Autor:
Berger, Ch., Sehgal, L. M.
Publikováno v:
Phys.Rev.D79:053003,2009
Coherent pi^+ and pi^0 production in low energy neutrino reactions is discussed in the framework of the partially conserved axial vector current theory (PCAC). The role of lepton mass effects in suppressing the pi^+ production is emphasized. Instead
Externí odkaz:
http://arxiv.org/abs/0812.2653
Autor:
Sehgal, L. M.
Publikováno v:
AIPConf.Proc.967:166-168,2007
For any inelastic process $v_{\ell} + I \to \ell^- + F$ with $m_{\ell} = 0$, the cross section at $\theta_{\ell} = 0$ is given by Adler's PCAC theorem. Inclusion of the lepton mass has a dynamical effect (``PCAC-screening'') caused by interference of
Externí odkaz:
http://arxiv.org/abs/0709.4450
Autor:
Berger, Ch., Sehgal, L. M.
Publikováno v:
Phys.Rev.D76:113004,2007
We reconsider the Feynman-Kislinger-Ravndal model applied to neutrino-excitation of baryon resonances. The effects of lepton mass are included, using the formalism of Kuzmin, Lyubushkin and Naumov. In addition we take account of the pion-pole contrib
Externí odkaz:
http://arxiv.org/abs/0709.4378
Autor:
Rein, D., Sehgal, L. M.
Publikováno v:
Phys.Lett.B657:207-209,2007
The K2K experiment, using a fine-grained detector in a neutrino beam of energy $ \sim 1.3 \mathrm{GeV}$ has observed two-track events that can be interpreted as a coherent reaction $\nu_\mu + \N \to \mu^- + \N + \pi^+ (\N = \rm{C}^{12})$ or an inc
Externí odkaz:
http://arxiv.org/abs/hep-ph/0606185
Autor:
Sehgal, L. M.
Rare decays of K mesons are reviewed from the perspective of testing the ``ones'' and ``zeros'' of the standard model. Decays K^+ -> pi^+ nu anti-nu and K_L -> pi^0 nu anti-nu probe the one-loop effective Hamiltonian for s -> d nu anti-nu, and can co
Externí odkaz:
http://arxiv.org/abs/hep-ph/0408175
Publikováno v:
Phys.Lett. B596 (2004) 240-246
We have recently shown that the large direct CP violation observed in the decay B^0 -> pi^+ pi^-, and the enhanced branching ratio for B^0 -> pi^0 pi^0, can be understood by invoking a small mixing of the pi pi system with the dominant D Dbar channel
Externí odkaz:
http://arxiv.org/abs/hep-ph/0406011
Autor:
Schulz, V. S., Sehgal, L. M.
Publikováno v:
Phys.Lett. B594 (2004) 153-163
We have studied in detail the spectrum of the decay mu^- -> e^- anti-nu_e nu_mu gamma as a function of the electron helicity, and verify the prediction of Sehgal (Phys.Lett. B569, 25 (2003)) that a significant fraction of the electrons in this decay
Externí odkaz:
http://arxiv.org/abs/hep-ph/0404023
Autor:
Sehgal, L. M., van Leusen, J.
Publikováno v:
Phys.Lett. B591 (2004) 235-241
We consider a model for the decay Bbar^0 -> rho^0 gamma in which the short-distance amplitude determined by the Hamiltonian describing b -> d gamma is combined with a typical long-distance contribution Bbar^0 -> D^+ D^- -> rho^0 gamma. The latter pos
Externí odkaz:
http://arxiv.org/abs/hep-ph/0403215