Gravitational imprints from heavy Kaluza-Klein resonances

Abstract

We systematically study the holographic phase transition of the radion field in a five-dimensional warped model which includes a scalar potential with a powerlike behavior. We consider Kaluza-Klein (KK) resonances with masses m KK at the TeV scale or beyond. The backreaction of the radion field on the gravitational metric is taken into account by using the superpotential formalism. The confinement/ deconfinement first order phase transition leads to a gravitational wave stochastic background which mainly depends on the scale m KK and the number of colors, N, in the dual theory. Its power spectrum peaks at a frequency that depends on the amount of tuning required in the electroweak sector. It turns out that the present and forthcoming gravitational wave observatories can probe scenarios where the KK resonances are very heavy. Current aLIGO data already rule out vector boson KK resonances with masses in the interval m KK ∼ ð1-10Þ × 10 5 TeV. Future gravitational experiments will be sensitive to resonances with masses m KK ≲ 10 5 TeV (LISA), 10 8 TeV (aLIGO Design) and 10 9 TeV (ET). Finally, we also find that the big bang nucleosynthesis bound in the frequency spectrum turns into a lower bound for the nucleation temperature as T n ≳ 10 −4 ffiffiffiffi N p m KK .

String fragmentation in supercooled confinement and implications for dark matter

“…the dilaton [24]). That supercooling occurs with a light dilaton is known from a JHEP04(2021)278 number of previous studies [16][17][18], see [25][26][27][28][29][30][31][32][33] for studies in a confining sector and [34][35][36][37][38][39][40][41][42][43] for studies of holographic dual 5D warped extra dimension models.…”

Fate of false vacua in holographic first-order phase transitions

“…The main aspects of the above mentioned simple scalar model can be generalized to vacuum decay in gravitational dual descriptions of quantum field theories, a process that has been studied in various papers in the past. Nevertheless, as far as we know, this literature is focused on bottom-up models with AdS geometries, like those relevant for Randall-Sundrum (RS)-like setups [8][9][10][11][12][13][14][15][16][17][18][19][20]. 2 In this paper we try to proceed a step further, studying, for the first time, the dynamics of first-order phase transitions in gauge theories with a precise string embedding.…”

Gravitational waves from a holographic phase transition

“…Cosmological phase transitions in holographic models have been studied mostly in the context of Randall-Sundrum models [24][25][26][27][28][29][30][31][32][33][34][35][36][37], where there is a first order phase transition between a black brane geometry and a horizonless geometry. From the field theory dual point of view this is interpreted as a confinement transition [38].…”

“…Gravitational wave production has also been studied in Randall-Sundrum models [25,[30][31][32][34][35][36][37], and recently in the context of the above-mentioned Sakai-Sugimoto model [43]. It should be noted that all these studies are based on static configurations.…”