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1.
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Observing black hole mergers beyond the pair-instability mass gap with next-generation gravitational wave detectors
/ Franciolini, Gabriele (CERN) ; Kritos, Konstantinos (Johns Hopkins U.) ; Reali, Luca (Johns Hopkins U.) ; Broekgaarden, Floor (Columbia U., Astron. Astrophys. ; Johns Hopkins U. ; Columbia U. ; Stony Brook U., New York, SCGP) ; Berti, Emanuele (Johns Hopkins U.)
Stellar evolution predicts the existence of a mass gap for black hole remnants produced by pair-instability supernova dynamics, whose lower and upper edges are very uncertain. We study the possibility of constraining the location of the upper end of the pair-instability mass gap, which is believed to appear around ${m_\text{min}} \sim130M_\odot$, using gravitational wave observations of compact binary mergers with next-generation ground-based detectors. [...]
arXiv:2401.13038.-
2024-07-15 - 12 p.
- Published in : Phys. Rev. D 110 (2024) 023036
Fulltext: Publication - PDF; 2401.13038 - PDF;
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2.
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Reciprocal of the CPT theorem
/ Álvarez-Gaumé, Luis (Stony Brook U., New York, SCGP ; CERN) ; Chaichian, Moshe M. (Helsinki U. ; Helsinki Inst. of Phys.) ; Oksanen, Markku A. (Helsinki U. ; Helsinki Inst. of Phys.) ; Tureanu, Anca (Helsinki U. ; Helsinki Inst. of Phys.)
The CPT theorem originally proven by Lüders and Pauli ensures the equality of masses, lifetimes, magnetic moments and cross sections of any particle and its antiparticle. We show that in a Lorentz invariant quantum field theory described by its Lagrangian, CPT-violating interaction alone does not split the masses of an elementary particle and its antiparticle but breaks only the equality of lifetimes, magnetic moments and cross sections. [...]
arXiv:2310.16008.-
2024-02-02 - 12 p.
Fulltext: PDF;
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3.
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The TORCH time-of-flight detector
/ Harnew, N (Oxford U.) ; Gao, R (Oxford U.) ; Hadavizadeh, T (Oxford U.) ; Hancock, T H (Oxford U.) ; Smallwood, J C (Oxford U.) ; Brook, N H (Bath U.) ; Bhasin, S (Bristol U.) ; Cussans, D (Bristol U.) ; Rademacker, J (Bristol U.) ; Forty, R (CERN) et al.
TORCH is a large-area time-of-flight (ToF) detector, proposed for the Upgrade-II of the LHCb experiment. It will provide charged hadron identification over a 2–20 GeV/c momentum range, given a 9.5m flight distance from the LHC interaction point. [...]
2022 - 3 p.
In : 15th Pisa Meeting on Advanced Detectors, La Biodola - Isola D'elba, Italy, 22 - 28 May 2022, pp.167991
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4.
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TORCH pattern recognition and particle identification performance
/ Garcia Martin, L M (Warwick U.) ; Blake, T (Warwick U.) ; Brook, N H (Bath U.) ; Cicala, M F (Warwick U.) ; Cussans, D (Bristol U.) ; van Dijk, M W U (CERN) ; Forty, R (CERN) ; Gershon, T (Warwick U.) ; Gys, T (CERN) ; Hadavizadeh, T (Oxford U.) et al.
The TORCH detector aims to provide K/π (K/p) separation up to a momentum of about 10 (15) by measuring their time-of-flight at the LHCb detector. Prompt Cherenkov photons are produced in a quartz radiator bar of 10 mm thickness, and propagated via total internal reflection to the periphery of the detector, where they are focused onto an array of microchannel plate photomultipliers that measure the photon arrival time and position. [...]
2023 - 4 p.
Fulltext: PDF;
In : 11th International Workshop on Ring Imaging Cherenkov Detectors (RICH 2022), Edinburgh, United Kingdom, 12 - 16 Sep 2022, pp.168437
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5.
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Black hole perturbation theory and multiple polylogarithms
/ Aminov, Gleb (SUNY, Stony Brook ; Stony Brook U., New York, SCGP) ; Arnaudo, Paolo (SISSA, Trieste ; INFN, Trieste ; Trieste U., DMI) ; Bonelli, Giulio (SISSA, Trieste ; INFN, Trieste ; Trieste U., DMI) ; Grassi, Alba (CERN ; Geneva U.) ; Tanzini, Alessandro (SISSA, Trieste ; INFN, Trieste ; Trieste U., DMI)
We study black hole linear perturbation theory in a four-dimensional Schwarzschild (anti) de Sitter background. When dealing with a positive cosmological constant, the corresponding spectral problem is solved systematically via the Nekrasov-Shatashvili functions or, equivalently, classical Virasoro conformal blocks. [...]
arXiv:2307.10141.-
2023-11-10 - 58 p.
- Published in : JHEP 2311 (2023) 059
Fulltext: document - PDF; 2307.10141 - PDF;
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6.
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Cosmology with the Galaxy Bispectrum Multipoles: Optimal Estimation and Application to BOSS Data
/ Ivanov, Mikhail M. (Princeton, Inst. Advanced Study ; NASA, Goddard) ; Philcox, Oliver H.E. (Princeton, Inst. Advanced Study ; Columbia U. ; Stony Brook U., New York, SCGP ; Princeton U.) ; Cabass, Giovanni (Princeton, Inst. Advanced Study) ; Nishimichi, Takahiro (Kyoto U., Yukawa Inst., Kyoto ; Tokyo U., IPMU) ; Simonović, Marko (CERN) ; Zaldarriaga, Matias (Princeton, Inst. Advanced Study)
We present a framework for self-consistent cosmological analyses of the full-shape anisotropic bispectrum, including the quadrupole $(\ell=2)$ and hexadecapole $(\ell=4)$ moments. This features a novel window-free algorithm for extracting the latter quantities from data, derived using a maximum-likelihood prescription. [...]
arXiv:2302.04414; YITP-23-13; CERN-TH-2023-022.-
2023-04-15 - 40 p.
- Published in : Phys. Rev. D 107 (2023) 083515
Fulltext: PDF;
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7.
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Measurement of the cross-section ratio σ$_{ψ(2S)}$/σ$_{J/ψ(1S)}$ in exclusive photoproduction at HERA
/ ZEUS Collaboration
The exclusive photoproduction reactions $\gamma p \to J/\psi(1S) p$ and $\gamma p \to \psi(2S) p$ have been measured at an $ep$ centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb$^{-1}$. The measurement was made in the kinematic range $30 < W < 180$ GeV, $Q^2 < 1$ GeV$^2$ and $|t| < 1$ GeV$^2$, where $W$ is the photon--proton centre-of-mass energy, $Q^2$ is the photon virtuality and $t$ is the squared four-momentum transfer at the proton vertex. [...]
arXiv:2206.13343; DESY-22-107.-
2022-12-29 - 27 p.
- Published in : JHEP 2212 (2022) 164
Fulltext: document - PDF; 2206.13343 - PDF;
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8.
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9.
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Constraining Single-Field Inflation with MegaMapper
/ Cabass, Giovanni (Princeton, Inst. Advanced Study) ; Ivanov, Mikhail M. (Princeton, Inst. Advanced Study ; NASA, Goddard) ; Philcox, Oliver H.E. (Columbia U. ; Stony Brook U., New York, SCGP) ; Simonovic, Marko (CERN) ; Zaldarriaga, Matias (Princeton, Inst. Advanced Study)
We forecast the constraints on single-field inflation from the bispectrum of future high-redshift surveys such as MegaMapper. Considering non-local primordial non-Gaussianity (NLPNG), we find that current methods will yield constraints of order $\sigma(f_{\rm NL}^{\rm eq})\approx 23$, $\sigma(f_{\rm NL}^{\rm orth})\approx 12$ in a joint power-spectrum and bispectrum analysis, varying both nuisance parameters and cosmology, including a conservative range of scales. [...]
arXiv:2211.14899; CERN-TH-2022-203.-
2023-04-13 - 6 p.
- Published in : Phys. Lett. B 841 (2023) 137912
Fulltext: 2211.14899 - PDF; Publication - PDF;
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10.
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New developments from the TORCH R&D; project
/ Jones, T (Warwick U.) ; Bhasin, S (Bath U. ; Bristol U.) ; Blake, T (Warwick U.) ; Brook, N H (Bath U.) ; Cicala, M F (Warwick U.) ; Conneely, T (Photek Ltd., UK) ; Cussans, D (Bristol U.) ; van Dijk, M W U (CERN) ; Forty, R (CERN) ; Frei, C (CERN) et al.
TORCH is a large-area and high-precision time-of-flight detector, designed to provide charged particle identification over a 2–20GeV/c momentum range. The TORCH detector comprises a 10 mm thick quartz radiator, instrumented with photon detectors, which precisely time and measure the arrival positions of the Cherenkov photons. [...]
2023 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1045 (2023) 167535
In : Vienna Conference on Instrumentation (VCI 2022), Online, Online, 21 - 25 Feb 2022, pp.167535
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