Effects of pair freeze-out on photon distributions in BBN epoch
We investigate the evolution of non-extensivity in the photon distribution during the Big Bang Nucleosynthesis (BBN) epoch using Tsallis statistics. Assuming a minimal deviation from the Planck distribution, we construct the perturbed Boltzmann equation for photons, including the collision terms for...
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| creator | Choi, Jeongyoon Jang, Dukjae Kwon, Youngshin Seong, Gwangeon Mun, Myeong Hwan Kim, Young-Min Kwak, Kyujin Cheoun, Myung-Ki |
| description | We investigate the evolution of non-extensivity in the photon distribution
during the Big Bang Nucleosynthesis (BBN) epoch using Tsallis statistics.
Assuming a minimal deviation from the Planck distribution, we construct the
perturbed Boltzmann equation for photons, including the collision terms for
pair creation and annihilation processes. We analyze the possibility that these
collisions could cause a slight increase in the number of high-frequency
photons within the BBN era, and consequently, the primordial plasma might be
temporarily placed in a state of chemical non-equilibrium. We also discuss the
restoration of the photon distribution to an equilibrium state as the Universe
enters the matter-dominated era. These findings, which suggest possible changes
in the photon distribution during the epoch between the BBN and the
recombination, offer insights that support the previously proposed ansatz
solution to the primordial lithium problem in arXiv:1812.09472. |
| doi_str_mv | 10.48550/arxiv.2402.13186 |
| format | Article |
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during the Big Bang Nucleosynthesis (BBN) epoch using Tsallis statistics.
Assuming a minimal deviation from the Planck distribution, we construct the
perturbed Boltzmann equation for photons, including the collision terms for
pair creation and annihilation processes. We analyze the possibility that these
collisions could cause a slight increase in the number of high-frequency
photons within the BBN era, and consequently, the primordial plasma might be
temporarily placed in a state of chemical non-equilibrium. We also discuss the
restoration of the photon distribution to an equilibrium state as the Universe
enters the matter-dominated era. These findings, which suggest possible changes
in the photon distribution during the epoch between the BBN and the
recombination, offer insights that support the previously proposed ansatz
solution to the primordial lithium problem in arXiv:1812.09472.</description><identifier>DOI: 10.48550/arxiv.2402.13186</identifier><language>eng</language><subject>Physics - Cosmology and Nongalactic Astrophysics</subject><creationdate>2024-02</creationdate><rights>http://creativecommons.org/licenses/by/4.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,776,881</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/2402.13186$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.2402.13186$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Choi, Jeongyoon</creatorcontrib><creatorcontrib>Jang, Dukjae</creatorcontrib><creatorcontrib>Kwon, Youngshin</creatorcontrib><creatorcontrib>Seong, Gwangeon</creatorcontrib><creatorcontrib>Mun, Myeong Hwan</creatorcontrib><creatorcontrib>Kim, Young-Min</creatorcontrib><creatorcontrib>Kwak, Kyujin</creatorcontrib><creatorcontrib>Cheoun, Myung-Ki</creatorcontrib><title>Effects of pair freeze-out on photon distributions in BBN epoch</title><description>We investigate the evolution of non-extensivity in the photon distribution
during the Big Bang Nucleosynthesis (BBN) epoch using Tsallis statistics.
Assuming a minimal deviation from the Planck distribution, we construct the
perturbed Boltzmann equation for photons, including the collision terms for
pair creation and annihilation processes. We analyze the possibility that these
collisions could cause a slight increase in the number of high-frequency
photons within the BBN era, and consequently, the primordial plasma might be
temporarily placed in a state of chemical non-equilibrium. We also discuss the
restoration of the photon distribution to an equilibrium state as the Universe
enters the matter-dominated era. These findings, which suggest possible changes
in the photon distribution during the epoch between the BBN and the
recombination, offer insights that support the previously proposed ansatz
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during the Big Bang Nucleosynthesis (BBN) epoch using Tsallis statistics.
Assuming a minimal deviation from the Planck distribution, we construct the
perturbed Boltzmann equation for photons, including the collision terms for
pair creation and annihilation processes. We analyze the possibility that these
collisions could cause a slight increase in the number of high-frequency
photons within the BBN era, and consequently, the primordial plasma might be
temporarily placed in a state of chemical non-equilibrium. We also discuss the
restoration of the photon distribution to an equilibrium state as the Universe
enters the matter-dominated era. These findings, which suggest possible changes
in the photon distribution during the epoch between the BBN and the
recombination, offer insights that support the previously proposed ansatz
solution to the primordial lithium problem in arXiv:1812.09472.</abstract><doi>10.48550/arxiv.2402.13186</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Physics - Cosmology and Nongalactic Astrophysics |
| title | Effects of pair freeze-out on photon distributions in BBN epoch |
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