Significance of classically forbidden regions for short baseline neutrino experiments

• URL: http://arxiv.org/abs/2304.06736v1
• Date: Thu, 13 Apr 2023 13:31:38 GMT
• Title: Significance of classically forbidden regions for short baseline neutrino experiments
• Authors: Dharam Vir Ahluwalia
• Abstract summary: We show that in the context of neutrino oscillations these observations have the potential to resolve various short baseline anomalies for a sufficiently light lowest mass eigenstate. We make a concrete prediction for the upcoming results to be announced later this year by JSNS$2$.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Classically forbidden regions ($\mathtt{CFRs}$) are common to both non-relativistic quantum mechanics, and to relativistic quantum field theory. It is known since 2001 that $\mathtt{CFR}$ contributes roughly sixteen percent of energy to the ground state of a simple harmonic oscillator (Adunas G. Z. et al., Gen. Relativ. Gravit., 33 (2001) 183). Similarly, quantum field theoretic arguments yield a non-zero amplitude for a massive particle to cross the light cone (that is, into the $\mathtt{CFR}$). The signs of these amplitudes are opposite for fermions and antifermions. This has given rise to an erroneous conclusion that amplitude to cross the lightcone is identically zero. This is true as long as a measurement does not reveal the considered object to be a particle or antiparticle. However, neutrino oscillation experiments do measure a neutrino $\nu$, or an antineutrino $\bar\nu$. Here we show that in the context of neutrino oscillations these observations have the potential to resolve various short baseline anomalies for a sufficiently light lowest mass eigenstate. In addition, we make a concrete prediction for the upcoming results to be announced later this year by JSNS$^2$.

Related papers

• Direct Experimental Constraints on the Spatial Extent of a Neutrino Wavepacket [0.4303687694525454]
  neutrinos are the least understood fundamental particles of nature. quantum properties of neutrinos emitted in experimentally relevant sources are virtually unknown. Lower limit on the spatial uncertainty of the recoil daughter was found to be $sigma_textrmN, x geq 6.2$,pm.
  arXiv  Detail & Related papers  (2024-04-03T23:02:17Z)
• Robust spectral $\pi$ pairing in the random-field Floquet quantum Ising model [44.84660857803376]
  We study level pairings in the many-body spectrum of the random-field Floquet quantum Ising model. The robustness of $pi$ pairings against longitudinal disorder may be useful for quantum information processing.
  arXiv  Detail & Related papers  (2024-01-09T20:37:48Z)
• Towards the "puzzle" of Chromium dimer Cr$_2$: predicting the Born-Oppenheimer rovibrational spectrum [44.99833362998488]
  This paper calculates the potential energy curve for the state $X1Sigma+$ of the Cr$$$ dimer. It is found for the first time for the whole range of internuclear distances $R$.
  arXiv  Detail & Related papers  (2024-01-06T17:00:12Z)
• Ultracold Neutrons in the Low Curvature Limit: Remarks on the post-Newtonian effects [49.1574468325115]
  We apply a perturbative scheme to derive the non-relativistic Schr"odinger equation in curved spacetime. We calculate the next-to-leading order corrections to the neutron's energy spectrum. While the current precision for observations of ultracold neutrons may not yet enable to probe them, they could still be relevant in the future or in alternative circumstances.
  arXiv  Detail & Related papers  (2023-12-30T16:45:56Z)
• Existence of quantum states for Klein-Gordon particles based on exact and approximate scenarios with pseudo-dot spherical confinement [0.0]
  It is shown how confluent hypergeometric functions have principal quantum numbers for considered spatial confinement. The findings related to the relativistic eigenvalues of the Klein-Gordon particle moving spherical space show the dependence of mass distribution.
  arXiv  Detail & Related papers  (2023-07-11T15:09:56Z)
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
  A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins. These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field. We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
  arXiv  Detail & Related papers  (2023-05-10T12:59:07Z)
• Experimental observation of thermalization with noncommuting charges [53.122045119395594]
  Noncommuting charges have emerged as a subfield at the intersection of quantum thermodynamics and quantum information. We simulate a Heisenberg evolution using laser-induced entangling interactions and collective spin rotations. We find that small subsystems equilibrate to near a recently predicted non-Abelian thermal state.
  arXiv  Detail & Related papers  (2022-02-09T19:00:00Z)
• Experimental test of the third quantization of the electromagnetic field [0.0]
  An approach was recently introduced in which the wave function $smallpsi_j(x_j)$ was further quantized to produce a field operator $smallhat psi_j(x_j)$. Here we report the results of an optical scattering experiment that set an upper bound of $smallgammaleq 1.93 times 10-4$ at the 99% confidence level.
  arXiv  Detail & Related papers  (2022-01-17T19:47:09Z)
• Electric Field Decay Without Pair Production: Lattice, Bosonization and Novel Worldline Instantons [0.0]
  We study the quantum evolution of electric fields when the field points in a compact direction with circumference $L d$ using the massive Schwinger model. We uncover a new and previously unknown set of instantons that result in novel physics that disagrees with all previous estimates.
  arXiv  Detail & Related papers  (2021-07-09T17:26:39Z)
• A search for neutron to mirror-neutron oscillations [0.22705102969616636]
  Astrophysical studies and terrestrial experiments led by ultracold neutron storage measurements have investigated neutron to mirror-neutron oscillations. Recent analysis of these ultracold neutron storage experiments has yielded statistically significant anomalous signals that may be interpreted as neutron to mirror-neutron oscillations.
  arXiv  Detail & Related papers  (2020-09-23T10:43:20Z)
• Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
  We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit. We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront. The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
  arXiv  Detail & Related papers  (2020-03-09T21:27:02Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.