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1.
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Direct anthropic bound on the weak scale from supernovae explosions
/ D'Amico, Guido (Parma U. ; INFN, Parma ; Stanford U., ITP) ; Strumia, Alessandro (U. Pisa (main)) ; Urbano, Alfredo (INFN, Trieste ; U. Trieste (main)) ; Xue, Wei (CERN)
Core-collapse supernovae presumably explode because trapped neutrinos push the material out of the stellar envelope. This process is directly controlled by the weak scale $v$: we argue that supernova explosions happen only if fundamental constants are tuned within a factor of few as $v \sim \Lambda_{\rm QCD}^{3/4} M_{\rm Pl}^{1/4}$, such that neutrinos are trapped in supernovae for a time comparable to the gravitational time-scale. [...]
arXiv:1906.00986; CERN-TH-2019-086.-
2019-10-18 - 15 p.
- Published in : Phys. Rev. D 100 (2019) 083013
Fulltext: PDF; Fulltext from Publisher: PDF;
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2.
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Strongly interacting light dark matter
/ Urbano, Alfredo (CERN)
We discuss a class of Dark Matter (DM) models that, although inherently strongly coupled, appear weakly coupled at small-energy and fulfill the WIMP miracle, generating a sizable relic abundance through the standard freeze-out mechanism. Such models are based on approximate global symmetries that forbid relevant interactions; fundamental principles, like unitarity, restrict these symmetries to a small class, in such a way that the leading interactions between DM and the Standard Model are captured by effective operators up to dimension-8. [...]
2017 - 7 p.
- Published in : Frascati Phys. Ser.: 65 (2017) , pp. 150-156
Fulltext: PDF;
In : Old and New Strong Interactions from LHC to Future Colliders, Trento, Italy, 11 - 15 Sep 2017, pp.150-156
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3.
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High Energy Neutrino expectations from the Central Molecular Zone
/ Marinelli, Antonio (INFN, Pisa ; Pisa U.) ; Gaggero, Daniele (U. Amsterdam, GRAPPA) ; Grasso, Dario (INFN, Pisa ; Pisa U.) ; Taoso, Marco (Madrid, IFT) ; Urbano, Alfredo (CERN) ; Ventura, Sofia (INFN, Pisa ; Pisa U.)
The density of molecular gas in the central few hundreds parsecs of our Galaxy is estimated to be two orders of magnitude larger than the Galactic average. This, so called, Central Molecular Zone, represent a privileged target where to look for a signature of Galactic cosmic ray interactions. [...]
SISSA, 2018 - 8 p.
- Published in : PoS ICRC2017 (2018) 939
Fulltext: PDF; External link: PoS server
In : 35th International Cosmic Ray Conference, Busan, Republique De Coree, 12 - 20 Jul 2017, pp.939
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4.
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Report from Working Group 3 : Beyond the Standard Model physics at the HL-LHC and HE-LHC
/ Cid Vidal, Xabier (Santiago de Compostela U., IGFAE) ; D'Onofrio, Monica (Liverpool U.) ; Fox, Patrick J (Fermilab) ; Torre, Riccardo (CERN ; INFN, Genoa) ; Ulmer, Keith A (Colorado U.) ; Aboubrahim, Amin (Northeastern U.) ; Albert, Andreas (RWTH Aachen U.) ; Alimena, Juliette (Ohio State U., Columbus (main)) ; Allanach, Benjamin C (Cambridge U., DAMTP) ; Alpigiani, Cristiano (Washington U., Seattle) et al.
This is the third out of five chapters of the final report [1] of the Workshop on Physics at HL-LHC, and perspectives on HE-LHC [2]. It is devoted to the study of the potential, in the search for Beyond the Standard Model (BSM) physics, of the High Luminosity (HL) phase of the LHC, defined as $3$ ab$^{-1}$ of data taken at a centre-of-mass energy of 14 TeV, and of a possible future upgrade, the High Energy (HE) LHC, defined as $15$ ab$^{-1}$ of data at a centre-of-mass energy of 27 TeV. [...]
arXiv:1812.07831; CERN-LPCC-2018-05.-
Geneva : CERN, 2019-12-02 - 281 p.
- Published in : CERN Yellow Rep. Monogr. 7 (2019) 585-865
Fulltext: PDF; arXiv: PDF; External link: Published Fulltext
In : HL/HE-LHC Workshop : Workshop on the Physics of HL-LHC, and Perspectives at HE-LHC, Geneva, Switzerland, 18 - 20 Jun 2018
Report on the Physics at the HL-LHC, and Perspectives for the HE-LHC, Geneva, Switzerland, 18 - 20 Jun 2018, pp.585-865
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5.
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On gravitational echoes from ultracompact exotic stars
/ Urbano, Alfredo (INFN, Trieste ; SISSA, Trieste) ; Veermäe, Hardi (CERN ; NICPB, Tallinn)
At the dawn of a golden age for gravitational wave astronomy, we must leave no stone unturned in our quest for new phenomena beyond our current understanding of General Relativity (GR), particle physics and nuclear physics. In this paper we discuss gravitational echoes from ultracompact stars. [...]
arXiv:1810.07137; CERN-TH-2018-224.-
2019-04-08 - 45 p.
- Published in : JCAP 04 (2019) 011
Fulltext: PDF;
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6.
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The very high energy gamma-ray diffuse emission from the Galactic Center
/ Gaggero, Daniele (U. Amsterdam, GRAPPA) ; Grasso, Dario (INFN, Pisa ; Pisa U.) ; Marinelli, Antonio (Pisa U. ; INFN, Pisa) ; Taoso, Marco (Madrid, IFT) ; Urbano, Alfredo (CERN) ; Ventura, Sofia (INFN, Pisa ; Pisa U.)
We present a novel interpretation of the gamma-ray diffuse emission in the Galactic Center (GC) and the Central Molecular Zone (CMZ) regions. This is based on a scenario assuming a harder scaling of the diffusion coefficient with rigidity in the inner Galaxy which reproduces the radial dependence of the cosmic-ray (CR) spectral index recently inferred from Fermi-LAT. [...]
SISSA, 2018 - 5 p.
- Published in : PoS EPS-HEP2017 (2017) 014
Fulltext: PDF; External link: PoS server
In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.014
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7.
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Room for New Physics in the Rayleigh-Jeans Tail of the Cosmic Microwave Background
/ Pospelov, Maxim (Perimeter Inst. Theor. Phys. ; Victoria U. ; CERN) ; Pradler, Josef (Vienna, OAW) ; Ruderman, Joshua T. (CERN ; New York U., CCPP) ; Urbano, Alfredo (CERN ; INFN, Trieste ; SISSA, Trieste)
We show that despite stringent constraints on the shape of the main part of the CMB spectrum, there is considerable room for its modification within its Rayleigh-Jeans (RJ) end, $\omega \ll T_{\rm CMB}$. We construct explicit New Physics models that give an order one (or larger) increase of photon count in the RJ tail, which can be tested by existing and upcoming experiments aiming to detect the cosmological 21 cm emission/absorption signal. [...]
arXiv:1803.07048; CERN-TH-2018-059.-
2018-07-21 - 6 p.
- Published in : Phys. Rev. Lett. 121 (2018) 031103
Article from SCOAP3: PDF; Fulltext: fulltext - XML; 1803.07048 - PDF; Fulltext from Publisher: PDF;
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8.
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Dark Matter in the Standard Model?
/ Gross, Christian (Pisa U. ; INFN, Pisa) ; Polosa, Antonello (INFN, Rome ; Rome U.) ; Strumia, Alessandro (Pisa U. ; INFN, Pisa ; CERN) ; Urbano, Alfredo (INFN, Trieste ; SISSA, Trieste ; CERN) ; Xue, Wei (CERN)
We critically reexamine two possible Dark Matter candidate within the Standard Model. First, we consider the $uuddss$ exa-quark. [...]
arXiv:1803.10242; CERN-TH-2018-065.-
2018-09-12 - 18 p.
- Published in : Phys. Rev. D 98 (2018) 063005
Article from SCOAP3: PDF; Fulltext: PDF;
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9.
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10.
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Clockwork / Linear Dilaton: Structure and Phenomenology
/ Giudice, Gian F. (CERN) ; Kats, Yevgeny (CERN ; Ben Gurion U. of Negev) ; McCullough, Matthew (CERN) ; Torre, Riccardo (CERN ; INFN, Genoa) ; Urbano, Alfredo (CERN ; INFN, Trieste)
The linear dilaton geometry in five dimensions, rediscovered recently in the continuum limit of the clockwork model, may offer a solution to the hierarchy problem which is qualitatively different from other extra-dimensional scenarios and leads to distinctive signatures at the LHC. We discuss the structure of the theory, in particular aspects of naturalness and UV completion, and then explore its phenomenology, suggesting novel strategies for experimental searches. [...]
arXiv:1711.08437; CERN-TH-2017-219.-
2018-06-01 - 70 p.
- Published in : JHEP 1806 (2018) 009
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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