OBJECTIVE To examine the plausibility of health claims for Eclipse, a novel smoking article being marketed by the RJ Reynolds Tobacco Company (RJR) as potentially reducing the risk of cancer and other diseases compared to conventional cigarettes. DATA SOURCES A company product website (www.eclipse.rjrt.com) summarising scientific studies of various versions of Eclipse, and the published revie...

The geodetic and frame-dragging effects are the direct consequences of spacetime curvature near Earth which can be probed from Gravity probe B (GP-B) satellite. satellite result matches quite well with Einstein's general relativistic result. gyroscope measures contains lots electrons nucleons. Ultralight axions, vector gauge bosons, unparticles interact these nucleons through different spin-dep...

One class of competitive candidates for dark matter is ultralight bosons. If they exist, these bosons may form long-lived bosonic clouds surrounding rotating black holes via superradiant instabilities, acting as sources gravity and affecting the propagation gravitational waves around host hole. During extreme-mass-ratio inspirals, will survive inspiral phase can affect quasinormal-mode frequenc...

Abstract We explore the neutrinoless double beta (0 ??? ) decay induced by an ultralight dark matter field coupled to neutrinos. The effect on 0 is significant if coupling violates lepton number, for which ?L = 2 transition directly driven without further suppression of small neutrino masses. As can be well described a classical field, features periodic modulation pattern in events. However, we...

In this work we derive simple closed-form expressions for the dynamical friction acting on black holes moving through ultralight (scalar field) dark matter, covering both nonrelativistic and relativistic hole speeds. Our derivation is based long known scattering amplitudes in spacetimes, it includes effect of spin can be easily extended to vector tensor light fields. results cover complement re...