A solution to lithium problem by long-lived stau

Sato, Joe; Shimomura, Takashi; Yamanaka, Masato

doi:10.1142/s0218301317410051

Cited by 11 publications

(9 citation statements)

References 135 publications

(230 reference statements)

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“…A number of theoretical or experimental studies in the literature have attempted to address the lithium problem (e.g. [1294][1295][1296][1297][1298][1299][1300][1301][1302][1303][1304][1305]). For example the analysis of Ref.…”

Section: Iii8 the Lithium Problemmentioning

confidence: 99%

Challenges for $Λ$CDM: An update

Perivolaropoulos,

Skara

2021

Preprint

224

298

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A number of challenges of the standard ΛCDM model has been emerging during the past few years as the accuracy of cosmological observations improves. In this review we discuss in a unified manner many existing signals in cosmological and astrophysical data that appear to be in some tension (2σ or larger) with the standard ΛCDM model as defined by the Planck18 parameter values. In addition to the major well studied 5σ challenge of ΛCDM (the Hubble H0 crisis) and other well known tensions (the growth tension and the lensing amplitude AL anomaly), we discuss a wide range of other less discussed less-standard signals which appear at a lower statistical significance level than the H0 tension (also known as 'curiosities' in the data) which may also constitute hints towards new physics. For example such signals include cosmic dipoles (the fine structure constant α, velocity and quasar dipoles), CMB asymmetries, BAO Lyα tension, age of the Universe issues, the Lithium problem, small scale curiosities like the core-cusp and missing satellite problems, quasars Hubble diagram, oscillating short range gravity signals etc. The goal of this pedagogical review is to collectively present the current status of these signals and their level of significance, with emphasis to the Hubble crisis and refer to recent resources where more details can be found for each signal. We also briefly discuss possible theoretical approaches that can potentially explain the non-standard nature of some of these signals.

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Section: Iii8 the Lithium Problemmentioning

confidence: 99%

Challenges for $Λ$CDM: An update

Perivolaropoulos,

Skara

2021

Preprint

224

298

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“…Many such attempts exist in the literature, so far without success. Examples of mechanisms considered include scalar-tensor theories, photon cooling, early-or late-time decaying particles (including decaying dark matter, or magnetic fields [642,[1726][1727][1728][1729][1730][1731][1732][1733][1734][1735][1736][1737][1738]. They either fail by being incompatible with other constraints, require strong finetuning, or can only alleviate the problem (e.g., by increasing the error bars for the theoretically expected abundances).…”

Section: The Lithium Problemmentioning

confidence: 99%

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Abdalla,

Abellán,

Aboubrahim

et al. 2022

Preprint

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This White Paper has been prepared to fulfill SNOWMASS 2021 requirements and it extends the material previously summarized in the four Letters of Interest [1][2][3][4]. The Particle Physics Community Planning Exercise (a.k.a. SNOWMASS ) is organized by the Division of Particles and Fields of the American Physical Society, and this is an effort to bring together the community of theoretical physicists and cosmologists and identify promising opportunities to address the questions described.This White Paper was initiated with the aim of identifying the opportunities in the cosmological field for the next decade, and strengthening the coordination of the community. It is addressed to identifying the most promising directions of investigation, and rather than attempting a long review of the current status of the whole field of research, it focuses on the upcoming theoretical opportunities and challenges described. The White Paper is a collaborative effort led by Eleonora Di Valentino and Luis Anchordoqui, and it is organized in the topics listed below, each of them coordinated by the scientists indicated (alphabetical order):

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“…A number of recent papers have addressed this problem [6,13,14,[23][24][25][26][27][28][29]. At present it is not yet known if this discrepancy derives from a destruction of lithium on the old stars used to deduce the primordial lithium abundance, or if it requires exotic new physics in the early universe [13,14,23,24,26], or even a modification of the particle statistics in BBN itself [27,28]. In this paper, we summarize some recent work and their prospects for solving the lithium problem.…”

Section: Lithium Abundancementioning

confidence: 99%

Cosmological Solutions to the Lithium Problem

Mathews

Kedia

Sasankan

et al. 2020

Proceedings of the 15th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG15)

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The abundance of primordial lithium is derived from the observed spectroscopy of metal-poor stars in the galactic halo. However, the observationally inferred abundance remains at about a factor of three below the abundance predicted by standard big bang nucleosynthesis (BBN). The resolution of this dilemma can be either astrophysical (stars destroy lithium after BBN), nuclear (reactions destroy lithium during BBN), or cosmological, i.e. new physics beyond the standard BBN is responsible for destroying lithium. Here, we overview a variety of possible cosmological solutions, and their shortcomings. On the one hand, we examine the possibility of physical processes that modify the velocity distribution of particles from the usually assumed Maxwell-Boltzmann statistics. A physical justification for this is an inhomogeneous spatial distribution of domains of primordial magnetic field strength as a means to reduce the primordial lithium abundance. Another possibility is that scattering with the mildly relativistic electrons in the background plasma alters the baryon distribution to one resembling a Fermi-Dirac distribution. We show that neither of these possibilities can adequately resolve the lithium problem. A number of alternate hybrid models are discussed including a mix of neutrino degeneracy, unified dark matter, axion cooling, and the presence of decaying and/or charged supersymmetric particles.

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A solution to lithium problem by long-lived stau

Cited by 11 publications

References 135 publications

Challenges for $Λ$CDM: An update

Challenges for $Λ$CDM: An update

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Cosmological Solutions to the Lithium Problem

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