Limits on a Gravitational Field Dependence of the Proton-Electron Mass Ratio from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>in White Dwarf Stars

Bagdonaite, J.; Salumbides, E. J.; Preval, S. P.; Barstow, M. A.; Barrow, John D.; Murphy, Michael T.; Ubachs, Wim

doi:10.1103/physrevlett.113.123002

Cited by 29 publications

(33 citation statements)

References 43 publications

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“…(2) doubles for condensed matter and given particulate electron's ( ) = 4.8828 10 , remaining as cognitively unclear as before". Variability of μ has been extensively investigated and majority findings would seem to support invariability, Ubachs et al (2015), Duff (2004), Varshalovich (1999), Bagdonaite et al (2014), Godun et al (2014), Kirakosyan (2015), Consiglio (2016), Gabrielse (2006), Berkenstein (1982), Berkenstein (2002).…”

Section: Planck Constant Hmentioning

confidence: 99%

On the Fundamental Physical Constants: I. Phenomenology

Obande¹

2017

APR

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The fundamental physical constants (FCs) are parametrized. The results reveal that: 1) FCs are field coupling constants. With the exception of ratio of identities such as μ = m p /m e , there are no dimensionless constants -all FCs, including α and π, are dimensional. 2) The constant k = 1.6022 x 10 -19 implicates: i) atomic unit of torque, it causes matter's intrinsic rotation on all (atomic to cosmic) scales; ii) motion of unrestricted bodies through free space and random thermal (Brownian) motion in condensed matter; iii) superluminal space expansion, i.e., Hubble effect is not an acceleration but tangential velocity (πc) of free space; and iv) common parametric definition of radioactivity and stellar explosion/supernova. 3) Newtonian gravitation comprises two potentials, a spherical pneumatic torque field G 1 acts to inflate the gravitational envelope and a combination of force fields G 2 impacts an acute hydrostatic pressure on the individual and common envelopes of the gravitating bodies; the two contrary force fields function to create a coherent rigid system in dynamic equilibrium. is associated with the strong nuclear force (SNF), it binds matter on all (atomic to cosmic) scales. 5) Although the classical electron radius (CER) formulation r e = e 2 /m e c 2 yields correct value, it is nonetheless fortuitous as m e deviates from the theoretical value by twenty orders of magnitude and theory does not link spatial dimension to electrostatics charge quantum. 6) Successful evaluation of r e by three alternative methods implies that an attempt to relegate the CER as currently obtains in the Standard Model seeks to re-engineer reality. 7) Electron bosonic radius identifies with the astronomical unit, it accounts for "spooky" action at a distance and "entanglement" effects. 8) Planck length fails to relate to atomic spatial dimension indicating that Planck space does not refer to the atom. 9) Electric, magnetic and gravitational effects are all motivated by torque but its magnitude differs according to the order: electrical (N m) > magnetic (N m) 0.75 > gravitational (N m) 0.25 . It is submitted that even if the atom degraded with cosmological epoch, values of the FCs would remain fixed because they are parametric relative quantities.

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Section: Planck Constant Hmentioning

confidence: 99%

On the Fundamental Physical Constants: I. Phenomenology

Obande¹

2017

APR

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“…More recently direct observational constraints have been obtained, also at about the 50 ppm level of sensitivity, for both α and µ using white dwarf stars [127,128]. These come from spectroscopic observations of highly excited metal lines (FeV and NiV) and molecular hydrogen, respectively Two-dimensional likelihoods for each pair of couplings, marginalizing over the other, from a global analysis of the data in Table 6.…”

Section: Other Probesmentioning

confidence: 99%

The status of varying constants: a review of the physics, searches and implications

2017

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Abstract. The observational evidence for the recent acceleration of the universe demonstrates that canonical theories of cosmology and particle physics are incomplete-if not incorrect-and that new physics is out there, waiting to be discovered. A key task for the next generation of laboratory and astrophysical facilities is to search for, identify and ultimately characterize this new physics. Here we highlight recent developments in tests of the stability of nature's fundamental couplings, which provide a direct handle on new physics: a detection of variations will be revolutionary, but even improved null results provide competitive constraints on a range of cosmological and particle physics paradigms. A joint analysis of all currently available data shows a preference for variations of α and µ at about the two-sigma level, but inconsistencies between different sub-sets (likely due to hidden systematics) suggest that these statistical preferences need to be taken with caution. On the other hand, these measurements strongly constrain Weak Equivalence Principle violations. Plans and forecasts for forthcoming studies with facilities such as ALMA, ESPRESSO and the ELT, which should clarify these issues, are also discussed, and synergies with other probes are briefly highlighted. The goal is to show how a new generation of precision consistency tests of the standard paradigm will soon become possible.PACS numbers: 98.80.Es, 95.36.+x, 98.62.Ra,

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“…In view of the high local temperatures higher vibrational states of H 2 are populated in the WD photospheres, in contrast to the cold environments probed in quasar absorption, where only H 2 (v = 0) is detected. In view of the Franck-Condon factors of H 2 the Lyman bands B-X(1, 3) and (1, 4) are the most strongly represented in the observed spectrum which covers the range 1310-1412 Å (Bagdonaite et al 2014a). At temperatures of T > 10 000 K rotational quantum states of up to J = 25 are effectively populated and a simulation of the spectra involves starting from the partition function including all states populated (Salumbides et al 2015):…”

Section: Detection Of H 2 In the Photosphere Of White Dwarfsmentioning

confidence: 97%

“…for GD-133 (at φ = 1.2 × 10 −4 ) (Bagdonaite et al 2014a). Thus far the objects GD-29-38 and GD-133 are the only white dwarf stars for which an H 2 absorption spectrum of sufficient SNR was obtained.…”

Section: Detection Of H 2 In the Photosphere Of White Dwarfsmentioning

confidence: 99%

Search for Varying Constants of Nature from Astronomical Observation of Molecules

Ubachs

2017

Space Sci Rev

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The status of searches for possible variation in the constants of nature from astronomical observation of molecules is reviewed, focusing on the dimensionless constant representing the proton-electron mass ratio μ = m p /m e . The optical detection of H 2 and CO molecules with large ground-based telescopes (as the ESO-VLT and the Keck telescopes), as well as the detection of H 2 with the Cosmic Origins Spectrograph aboard the Hubble Space Telescope is discussed in the context of varying constants, and in connection to different theoretical scenarios. Radio astronomy provides an alternative search strategy bearing the advantage that molecules as NH 3 (ammonia) and CH 3 OH (methanol) can be used, which are much more sensitive to a varying μ than diatomic molecules. Current constraints are | μ/μ| < 5 × 10 −6 for redshift z = 2.0-4.2, corresponding to look-back times of 10-12.5 Gyrs, and | μ/μ| < 1.5 × 10 −7 for z = 0.88, corresponding to half the age of the Universe (both at 3σ statistical significance). Existing bottlenecks and prospects for future improvement with novel instrumentation are discussed.

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Limits on a Gravitational Field Dependence of the Proton-Electron Mass Ratio fromH2in White Dwarf Stars

Cited by 29 publications

References 43 publications

On the Fundamental Physical Constants: I. Phenomenology

On the Fundamental Physical Constants: I. Phenomenology

The status of varying constants: a review of the physics, searches and implications

Search for Varying Constants of Nature from Astronomical Observation of Molecules

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