%0 Generic %1 rubira2022fullshape %A Rubira, Henrique %A Mazoun, Asmaa %A Garny, Mathias %D 2022 %K library %T Full-shape BOSS constraints on dark matter interacting with dark radiation and lifting the $S_8$ tension %U http://arxiv.org/abs/2209.03974 %X In this work we derive constraints on interacting dark matter-dark radiation models from a full-shape analysis of BOSS-DR12 galaxy clustering data, combined with Planck legacy cosmic microwave background (CMB) and baryon acoustic oscillation (BAO) measurements. We consider a set of models parameterized within the effective theory of structure formation (ETHOS), quantifying the lifting of the $S_8$ tension in view of KiDS weak-lensing results. The most favorable scenarios point to a fraction $f10-100\%$ of interacting dark matter as well as a dark radiation temperature that is smaller by a factor $\xi0.1-0.15$ compared to the CMB, leading to a reduction of the tension to the $1\sigma$ level. The temperature dependence of the interaction rate favored by relaxing the $S_8$ tension is realized for a weakly coupled unbroken non-Abelian $SU(N)$ gauge interaction in the dark sector. To map our results onto this $SU(N)$ model, we compute higher-order corrections due to Debye screening. We find a lower bound $\alpha_dg_d^2/(4\pi)10^-8 (10^-9)$ for dark matter mass $1000 (1)$ GeV for relaxing the $S_8$ tension, consistent with upper bounds from galaxy ellipticities and compatible with self-interactions relevant for small-scale structure formation.

@misc{rubira2022fullshape, abstract = {In this work we derive constraints on interacting dark matter-dark radiation models from a full-shape analysis of BOSS-DR12 galaxy clustering data, combined with Planck legacy cosmic microwave background (CMB) and baryon acoustic oscillation (BAO) measurements. We consider a set of models parameterized within the effective theory of structure formation (ETHOS), quantifying the lifting of the $S_8$ tension in view of KiDS weak-lensing results. The most favorable scenarios point to a fraction $f\sim 10-100\%$ of interacting dark matter as well as a dark radiation temperature that is smaller by a factor $\xi\sim 0.1-0.15$ compared to the CMB, leading to a reduction of the tension to the $\sim 1\sigma$ level. The temperature dependence of the interaction rate favored by relaxing the $S_8$ tension is realized for a weakly coupled unbroken non-Abelian $SU(N)$ gauge interaction in the dark sector. To map our results onto this $SU(N)$ model, we compute higher-order corrections due to Debye screening. We find a lower bound $\alpha_d\equiv g_d^2/(4\pi)\gtrsim 10^{-8} (10^{-9})$ for dark matter mass $1000 (1)$ GeV for relaxing the $S_8$ tension, consistent with upper bounds from galaxy ellipticities and compatible with self-interactions relevant for small-scale structure formation.}, added-at = {2022-09-12T08:30:27.000+0200}, author = {Rubira, Henrique and Mazoun, Asmaa and Garny, Mathias}, biburl = {https://www.bibsonomy.org/bibtex/2b84b7150defe58522492fd4bcd01fa32/gpkulkarni}, description = {Full-shape BOSS constraints on dark matter interacting with dark radiation and lifting the $S_8$ tension}, interhash = {9126482bc3c42518f42515dc48abbb98}, intrahash = {b84b7150defe58522492fd4bcd01fa32}, keywords = {library}, note = {cite arxiv:2209.03974Comment: 38 pages, 8 figures, 1 ancillary figure}, timestamp = {2022-09-12T08:30:27.000+0200}, title = {Full-shape BOSS constraints on dark matter interacting with dark radiation and lifting the $S_8$ tension}, url = {http://arxiv.org/abs/2209.03974}, year = 2022 }