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Dark Sector Showers in the Lund Jet Plane
/ Cohen, Timothy (CERN ; EPFL, Lausanne, LPTP ; Oregon U.) ; Roloff, Jennifer (Brookhaven) ; Scherb, Christiane (LBL, Berkeley ; UC, Berkeley (main))
We investigate the consequences of models where dark sector quarks could be produced at the LHC, which subsequently undergo a dark parton shower, generating jets of dark hadrons that ultimately decay back to Standard Model hadrons. This yields collider objects that can be nearly indistinguishable from Standard Model jets, motivating the reliance on substructure observables to tease out the signal. [...]
arXiv:2301.07732; CERN-TH-2023-007.-
2023-08-01 - 7 p.
- Published in : Phys. Rev. D 108 (2023) L031501
Fulltext: 2301.07732 - PDF; Publication - PDF;
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Sub-jet structure as a discriminating quenching probe
/ Zhang, Xiaoming (LBNL, Berkeley) ; Apolinário, Liliana (Lisbon, CENTRA) ; Milhano, José Guilherme (Lisbon, CENTRA ; CERN) ; Płoskoń, Mateusz (LBNL, Berkeley)
In this work, we propose a new class of jet substructure observables which, unlike fragmentation functions, are largely insensitive to the poorly known physics of hadronization. We show that sub-jet structures provide us with a large discriminating power between different jet quenching Monte Carlo implementations..
arXiv:1512.09255.-
2016-12 - 4 p.
- Published in : Nucl. Phys. A 956 (2016) 597-600
Fulltext: PDF; External link: Preprint
In : 25th International Conference on Ultra-relativistic Nucleus-nucleus Collisions, Kobe, Japan, 27 Sep - 4 Oct 2015, pp.597-600
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Finding symmetry breaking order parameters with Euclidean neural networks
/ Smidt, Tess E. (LBL, Berkeley ; Tsinghua U., Beijing) ; Geiger, Mario (LBL, Berkeley ; CERN ; Ecole Polytechnique, Lausanne) ; Miller, Benjamin Kurt (LBL, Berkeley ; Tsinghua U., Beijing ; Freie U., Berlin)
Curie's principle states that "when effects show certain asymmetry, this asymmetry must be found in the causes that gave rise to them". We demonstrate that symmetry equivariant neural networks uphold Curie's principle and can be used to articulate many symmetry-relevant scientific questions into simple optimization problems. [...]
arXiv:2007.02005.-
2021-01-05 - 6 p.
- Published in : Phys. Rev. Res.: 3 (2021) , no. 1, pp. L012002
Fulltext: PDF;
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Theory, phenomenology, and experimental avenues for dark showers: a Snowmass 2021 report
/ Albouy, Guillaume (LPSC, Grenoble) ; Barron, Jared (Toronto U.) ; Beauchesne, Hugues (NCTS, Taipei) ; Bernreuther, Elias (Fermilab) ; Bona, Marcella (Queen Mary, U. of London) ; Cazzaniga, Cesare (Zurich, ETH) ; Cesarotti, Cari (Harvard U.) ; Cohen, Timothy (Oregon U.) ; de Cosa, Annapaola (Zurich, ETH) ; Curtin, David (Toronto U.) et al.
In this work, we consider the case of a strongly coupled dark/hidden sector, which extends the Standard Model (SM) by adding an additional non-Abelian gauge group. These extensions generally contain matter fields, much like the SM quarks, and gauge fields similar to the SM gluons. [...]
arXiv:2203.09503; FERMILAB-PUB-22-303-PPD-SCD-T.-
2022-12-14 - 106 p.
- Published in : Eur. Phys. J. C 82 (2022) 1132
Fulltext: jt - PDF; 2203.09503 - PDF; Fulltext from Publisher: PDF; External links: Fermilab Library Server; eConf
In : 2021 Snowmass Summer Study, Seattle, WA, United States, 11 - 20 July 2021, pp.1132
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Cosmology at high redshift — a probe of fundamental physics
/ Sailer, Noah (UC, Berkeley) ; Castorina, Emanuele (Milan U. ; CERN) ; Ferraro, Simone (LBNL, Berkeley ; UC, Berkeley (main)) ; White, Martin (UC, Berkeley ; LBNL, Berkeley)
An observational program focused on the high redshift ($2<z<6$) Universe has the opportunity to dramatically improve over upcoming LSS and CMB surveys on measurements of both the standard cosmological model and its extensions. Using a Fisher matrix formalism that builds upon recent advances in Lagrangian perturbation theory, we forecast constraints for future spectroscopic and 21-cm surveys on the standard cosmological model, curvature, neutrino mass, relativistic species, primordial features, primordial non-Gaussianity, dynamical dark energy, and gravitational slip. [...]
arXiv:2106.09713.-
2021-12-21 - 62 p.
- Published in : JCAP 2112 (2021) 049
Fulltext: PDF;
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Jet Substructure at the Large Hadron Collider
/ Kogler, Roman (Hamburg U.) ; Nachman, Benjamin (LBNL, Berkeley) ; Schmidt, Alexander (RWTH Aachen U.) ; Asquith, Lily (U. Sussex (main)) ; Campanelli, Mario (U. Coll. London) ; Delitzsch, Chris (Arizona U. (main)) ; Harris, Philip (MIT) ; Hinzmann, Andreas (Hamburg U.) ; Kar, Deepak (Witwatersrand U.) ; McLean, Christine (UC, Davis) et al.
Jet substructure has emerged to play a central role at the Large Hadron Collider, where it has provided numerous innovative ways to search for new physics and to probe the Standard Model, particularly in extreme regions of phase space. In this article we focus on a review of the development and use of state-of-the-art jet substructure techniques by the ATLAS and CMS experiments..
arXiv:1803.06991; FERMILAB-PUB-18-123-PPD.-
2019-12-13 - 44 p.
- Published in : Rev. Mod. Phys. 91 (2019) 045003
Fulltext: fermilab-pub-18-123-ppd - PDF; 1803.06991 - PDF; External link: Fermilab Library Server (fulltext available)
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Pulsar Timing Probes of Primordial Black Holes and Subhalos
/ Dror, Jeff A. (LBL, Berkeley ; UC, Berkeley) ; Ramani, Harikrishnan (LBL, Berkeley ; UC, Berkeley) ; Trickle, Tanner (LBL, Berkeley ; UC, Berkeley) ; Zurek, Kathryn M. (CERN ; LBL, Berkeley ; UC, Berkeley)
Pulsars act as accurate clocks, sensitive to gravitational redshift and acceleration induced by transiting clumps of matter. We study the sensitivity of pulsar timing arrays (PTAs) to single transiting compact objects, focusing on primordial black holes and compact subhalos in the mass range from $10^{-12} M _{\odot}$ to well above $100~M_\odot$. [...]
arXiv:1901.04490.-
2019-07-13 - 18 p.
- Published in : Phys. Rev. D 100 (2019) 023003
Fulltext: PDF; Fulltext from Publisher: PDF;
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Resonant emittance mixing of flat beams in plasma accelerators
/ Diederichs, Severin (DESY ; CERN) ; Benedetti, Carlo (LBL, Berkeley) ; Pousa, Angel Ferran (DESY) ; Sinn, Alexander (DESY) ; Osterhoff, Jens (DESY ; LBL, Berkeley) ; Schroeder, Carl B. (LBL, Berkeley ; UC, Berkeley, Nucl. Eng. Dept.) ; Thévenet, Maxence (DESY)
Linear colliders rely on high-quality flat beams to achieve the desired event rate, while avoiding potentially deleterious beamstrahlung effects. [...]
arXiv:2403.05871.
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