On-shell kinematics for gluon scattering can be parametrized with points on the celestial sphere; in limit where these collide, it is known that tree-level amplitudes exhibit an operator product expansion (OPE)-like structure. While possible to obtain singular contributions this OPE, getting regular from both holomorphic and anti-holomorphic sectors more difficult. In paper, we use twistor stri...

We discuss questions related to the application of OPE for the long-lived systems with two heavy flavors. The values of quark masses entering such calulations are constrained by use of currently available data on the lifetimes of B d and B c-mesons. The lifetimes of doubly charmed baryons at these values of parameters are evaluated. The necessary comments on the difference in the results obtain...

We show the OPE formulae for three types of deformed super-Virasoro algebras: Chaichian-Presnajder's deformation, Belov-Chaltikhian's one and its modified version. Fundamental (anti-)commutation relations toward a ghost realization of deformed super-Virasoro algebra are also discussed.

We study the transverse spin structure of squeezed limit three-point energy correlator, $\langle \mathcal{E}(\vec n_1) n_2) n_3) \rangle$. To describe its all orders perturbative behavior, we develop light-ray operator product expansion (OPE) in QCD. At leading twist iterated OPE $\mathcal{E}(\vec n_i)$ operators closes onto $\mathbb{O}^{[J]}(\vec n)$ with $J$, and $j=0,2$. compute n_2)$, \math...

An oligo phenylene ethynylene OPE molecule with a nitro side group has exhibited electrical switching with memory and thus has potential for use in molecular electronic devices. However, different research groups have reported different electrical behaviors for this molecule. In addition to variations among test structures, differences in local molecular environments could be partially responsi...

We show that new BRST charges in RNS superstring theory with nonstandard ghost numbers, constructed in our recent work, can be mapped to deformed pure spinor (PS) superstring theories, with the nilpotent pure spinor BRST charge QPS = ∮ λdα still retaining its form but with singular operator products between commuting spinor variables λ. Despite the OPE singularities, the pure spinor condition λ...