Zobrazeno 1 - 10
of 204
pro vyhledávání: '"Kobach, A."'
Autor:
Kobach, Andrew
Publikováno v:
Phys. Lett. B., 809 (2020) 135708
Small changes in the masses of massive external scattering states should correspond to small changes in the non-perturbative parameterization of form factors in quantum field theory, as long as the relevant energy range is not near strong deformation
Externí odkaz:
http://arxiv.org/abs/1910.13024
Autor:
Helset, Andreas, Kobach, Andrew
For a large set of flavor symmetries, the lowest-dimensional baryon- or lepton-number violating operators in the Standard Model effective field theory (SMEFT) with flavor symmetry are of mass dimension 9. As a consequence, baryon- and lepton-number v
Externí odkaz:
http://arxiv.org/abs/1909.05853
Autor:
Kobach, Andrew, Pal, Sridip
We discuss how reparameterization invariance connects a rotationally-invariant heavy particle effective theory with a single fermion to a Lorentz-invariant theory. Using Hilbert-series methods, a Lorentz-invariant operator basis is tabulated, up to a
Externí odkaz:
http://arxiv.org/abs/1810.02356
Autor:
Kobach, Andrew, Pal, Sridip
An operator basis of an effective theory with a heavy particle, subject to external gauge fields, is spanned by a particular kind of neutral scalar primary of the nonrelativistic conformal group. We calculate the characters that can be used for gener
Externí odkaz:
http://arxiv.org/abs/1804.01534
We perform a calculation in quantum field theory of neutrino oscillation probabilities, where we include simultaneously the source, detector, and neutrino fields in the Hamiltonian. Within the appropriate limits associated with current neutrino oscil
Externí odkaz:
http://arxiv.org/abs/1711.07491
Autor:
Kobach, Andrew, Pal, Sridip
We use a Hilbert series to construct an operator basis in the $1/m$ expansion of a theory with a nonrelativistic heavy fermion in an electromagnetic (NRQED) or color gauge field (NRQCD/HQET). We present a list of effective operators with mass dimensi
Externí odkaz:
http://arxiv.org/abs/1704.00008
Autor:
Grinstein, Benjamin, Kobach, Andrew
Publikováno v:
Phys.Lett. B771 (2017) 359-364
We fit the unfolded data of $\bar{B}^0\rightarrow D^{*+} \ell \overline{\nu}$ from the Belle experiment, where $\ell \equiv e, \mu$, using a method independent of heavy quark symmetry to extrapolate to zero-recoil and extract the value of $|V_{cb}|$.
Externí odkaz:
http://arxiv.org/abs/1703.08170
Publikováno v:
Phys. Rev. D 95, 115010 (2017)
There is no guarantee that the violation of lepton number, assuming it exists, will primarily manifest itself in neutrinoless double beta decay ($0\nu\beta\beta$). Lepton-number violation and lepton-flavor violation may be related, and much-needed in
Externí odkaz:
http://arxiv.org/abs/1611.00032
Autor:
Kobach, Andrew
We prove that for a given operator in the Standard Model (SM) with baryon number B and lepton number L, that the operator's dimension is even (odd) if (B-L)/2 is even (odd). Consequently, this establishes the veracity of statements that were long obs
Externí odkaz:
http://arxiv.org/abs/1604.05726
Autor:
Kobach, Andrew
If the technology for muon storage rings one day permits sensitivity to precession at the order of $10^{-8}$ Hz, the local gravitational field of Earth can be a dominant contribution to the precession of the muon, which, if ignored, can fake the sign
Externí odkaz:
http://arxiv.org/abs/1603.00127