Blacker, Sebastian Bastian, Niels-Uwe F. Bauswein, Andreas Blaschke, David B. Fischer, Tobias Oertel, Micaela Soultanis, Theodoros Typel, Stefan

We study the possible occurrence of the hadron-quark phase transition (PT) during the merging of neutron star binaries by hydrodynamical simulations employing a set of temperature dependent hybrid equations of state (EoSs). Following previous work we describe an unambiguous and measurable signature of deconfined quark matter in the gravitational-wa...

Chang, Wen-Chen Peng, Jen-Chieh Platchkov, Stephane Sawada, Takahiro

The gluon distributions of the pion obtained from various global fits exhibit large variations among them. We show that the existing pion-induced $J/\psi$ production data, usually not included in the global fits, can impose useful additional constraints on the pion PDFs. In particular, these data can probe pion's gluon densities at large $x$. Exist...

Kastikainen, Jani

We study codimension-even conical defects that contain a deficit solid angle around each point along the defect. We show that they lead to a delta function contribution to the Lovelock scalar and we compute the contribution by two methods. We then show that these codimension-even defects appear as Euclidean brane solutions in higher dimensional top...

Bianchini, F. Wu, W.L.K. Ade, P.A.R. Anderson, A.J. Austermann, J.E. Avva, J.S. Balkenhol, L. Baxter, E. Beall, J.A. Bender, A.N.
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We present a search for anisotropic cosmic birefringence in 500 deg$^2$ of southern sky observed at 150 GHz with the SPTpol camera on the South Pole Telescope. We reconstruct a map of cosmic polarization rotation anisotropies using higher-order correlations between the observed cosmic microwave background (CMB) $E$ and $B$ fields. We then measure t...

Anson, Timothy Babichev, Eugeny Charmousis, Christos Hassaine, Mokhtar

Starting from a recently constructed stealth Kerr solution of higher order scalar tensor theory involving scalar hair, we analytically construct disformal versions of the Kerr spacetime with a constant degree of disformality and a regular scalar field. While the disformed metric has only a ring singularity and asymptotically is quite similar to Ker...

Ben Achour, Jibril Liu, Hongguang Motohashi, Hayato Mukohyama, Shinji Noui, Karim

Using the disformal solution-generating method, we construct new axisymmetric solutions in Degenerate Higher Order Scalar Tensor (DHOST) theories. The method consists in first considering a "seed" known solution in DHOST theories and then performing a disformal transformation of the metric to obtain a new solution. In vacuum, the two solutions are ...

Betzios, P. Kiritsis, E. Niarchos, V. Papadoulaki, O.

Hidden theories coupled to the SM may provide emergent (dark) vectors, that are composites/bound-states of the hidden fields. This is motivated by paradigms emerging from the AdS/CFT correspondence but it is a more general phenomenon. We explore the general setup and find that UV interactions among currents or charged fields give rise to emergent v...

Alexeev, M.G. Alexeev, G.D. Amoroso, A. Andrieux, V. Anosov, V. Antoshkin, A. Augsten, K. Augustyniak, W. Azevedo, C.D.R. Badełek, B.
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The COMPASS experiment recently discovered a new isovector resonance-like signal with axial-vector quantum numbers, the $a_1(1420)$, decaying to $f_0(980)\pi$. With a mass too close to and a width smaller than the axial-vector ground state $a_1(1260)$, it was immediately interpreted as a new light exotic meson, similar to the $X$, $Y$, $Z$ states i...

Bečirević, D. Le Yaouanc, A. Morénas, V. Oliver, L.

Motivated by the calculation of observables in the decays $\Lambda_b \to \Lambda_c\left({1 \over 2}^\pm \right) \ell \overline{\nu}$, as tests of Lepton Flavor Universality, we present a calculation of form factors in the quark model. Our scheme combines a spectroscopic model, providing the internal wave functions, and the Bakamjian-Thomas relativi...

Charles, Jérôme Descotes-Genon, Sébastien Ligeti, Zoltan Monteil, Stéphane Papucci, Michele Trabelsi, Karim Vale Silva, Luiz

The mixing of neutral mesons is sensitive to some of the highest scales probed in laboratory experiments. In light of the planned LHCb Upgrade II, a possible upgrade of Belle II, and the broad interest in flavor physics in the tera-$Z$ phase of the proposed FCC-ee program, we study constraints on new physics contributions to $B_d$ and $B_s$ mixings...