Edcel J. Salumbides

TL;DR: The ionization and dissociation energies of the hydrogen molecule have been determined to be 124,417.49113(37) and 36,118.06962 (37) cm(-1), respectively, which represents a precision improvement over previous experimental and theoretical results by more than one order of magnitude.

TL;DR: The fundamental ground tone vibration of H(2), HD, and D(2) is determined to an accuracy of 2×10(-4) cm(-1) from Doppler-free laser spectroscopy in the collisionless environment of a molecular beam providing a stringent test of quantum electrodynamics in a chemically bound system.

Abstract: ioncanbeinterpretedintermsofconstraintsonpossiblefifth-forceinteractions.Wherethehydrogen atom is a probe for yet unknown lepton-hadron interactions, and the helium atom is sensitiveforlepton-lepton interactions, molecules open the domain to search for additional long-range hadron-hadronforces. First principles calculations in the framework of quantum electrodynamics have now advanced tothe level that hydrogen molecules and hydrogen molecular ions have become calculable systems, makingthemasearchgroundforfifthforces.Followingaphenomenologicaltreatmentofunknownhadron-hadroninteractions written in terms of a Yukawapotential of the form V

TL;DR: In this paper, the authors used spectra of the Lyman and Werner bands of H2 at high redshift and those measured in the laboratory can be interpreted in terms of possible variations of the proton-electron mass ratio μ = m p / m e over cosmological history.

TL;DR: These benchmark values provide a test of QED in the smallest neutral molecule, and they open up an avenue to resolve the proton radius puzzle, as well as constrain putative fifth forces and extra dimensions.