# TH Articles

2019-09-28
04:47
 New physics implications of recent search for $K_L \to \pi^0 \nu\bar{\nu}$ at KOTO / Kitahara, Teppei (Technion ; KMI, Nagoya ; Nagoya U., IAR) ; Okui, Takemichi (Florida State U. ; KEK, Tsukuba) ; Perez, Gilad (Weizmann Inst.) ; Soreq, Yotam (Technion ; CERN) ; Tobioka, Kohsaku (Florida State U. ; KEK, Tsukuba) The KOTO experiment recently reported four candidate events in the signal region of $K_L\to \pi^0 \nu\bar\nu$ search, where the standard model only expects $0.10\pm 0.02$ events. If confirmed, this requires physics beyond the standard model to enhance the signal. [...] arXiv:1909.11111; KEK-TH-2157; CERN-TH-2019-151.- 2020-02-19 - 7 p. - Published in : Phys. Rev. Lett. 124 (2020) 071801 Article from SCOAP3: PDF; Fulltext: PDF;

2019-09-25
04:46
 Consistency checks for two-body finite-volume matrix elements: Conserved currents and bound states / Briceño, Raúl A. (Jefferson Lab ; Old Dominion U.) ; Hansen, Maxwell T. (CERN) ; Jackura, Andrew W. (Jefferson Lab ; Old Dominion U.) Recently, a framework has been developed to study form factors of two-hadron states probed by an external current. The method is based on relating finite-volume matrix elements, computed using numerical lattice QCD, to the corresponding infinite-volume observables. [...] arXiv:1909.10357; JLAB-THY-19-3040; CERN-TH-2019-149.- 2019-12-06 - 17 p. - Published in : Phys. Rev. D 100 (2019) 114505 Article from SCOAP3: PDF; Fulltext: PDF;

2019-09-11
04:58
 Second-order QCD corrections to event shape distributions in deep inelastic scattering / Gehrmann, T. (Zurich U.) ; Huss, A. (CERN) ; Mo, J. (Zurich U.) ; Niehues, J. (Durham U., IPPP) We compute the next-to-next-to-leading order (NNLO) QCD corrections to event shape distributions and their mean values in deep inelastic lepton-nucleon scattering. The magnitude and shape of the corrections varies considerably between different variables. [...] arXiv:1909.02760; CERN-TH-2019-140; IPPP/19/68; ZU-TH 39/19.- 2019-12-19 - 15 p. - Published in : Eur. Phys. J. C 79 (2019) 1022 Article from SCOAP3: PDF; Fulltext: PDF; External link: Fulltext from publisher

2019-09-07
04:57
 Correlating $\epsilon^\prime/\epsilon$ to hadronic $B$ decays via $U(2)^3$ flavour symmetry / Crivellin, Andreas (PSI, Villigen ; Zurich U.) ; Gross, Christian (INFN, Pisa ; Pisa U. ; CERN) ; Pokorski, Stefan (Warsaw U.) ; Vernazza, Leonardo (Nikhef, Amsterdam) There are strong similarities between charge-parity (CP) violating observables in hadronic $B$ decays (in particular $\Delta A^-_{\rm CP}$ in $B\to K\pi$) and direct CP violation in Kaon decays ($\epsilon^\prime$): All these observables are very sensitive to new physics (NP) which is at the same time CP and isospin violating (i.e. NP with complex couplings which are different for up quarks and down quarks). [...] arXiv:1909.02101; PSI-PR-19-18; UZ-TH 41/19; CERN-TH-2019-142; Nikhef/2019-041, INT-PUB-19-041; Nikhef/2019-041, INT-PUB-19-041.- 2020-01-29 - 8 p. - Published in : Phys. Rev. D 101 (2020) 015022 Fulltext: PDF; Published fulltext: PDF;

2019-09-01
05:17
 The Holographic Dual of Strongly $\gamma$-deformed N=4 SYM Theory: Derivation, Generalization, Integrability and Discrete Reparametrization Symmetry / Gromov, Nikolay (King's Coll. London ; St. Petersburg, INP) ; Sever, Amit (Tel Aviv U. ; CERN) Recently, we constructed the first-principle derivation of the holographic dual of N=4 SYM in the double-scaled $\gamma$-deformed limit directly from the CFT side. The dual fishchain model is a novel integrable chain of particles in AdS$_{5}$. [...] arXiv:1908.10379; CERN-TH-2019-144.- 2020-02-05 - 32 p. - Published in : JHEP 2002 (2020) 035 Article from SCOAP3: PDF; Fulltext: PDF;

2019-08-28
04:39
 The effective energy density of relic gravitons / Giovannini, Massimo (CERN ; INFN, Milan Bicocca) The energy density, the pressure and the anisotropic stress of the relic gravitons do not have a unique gauge-invariant and frame-invariant expression since the equivalence principle ultimately forbids the localization of the energy-momentum of the gravitational field. All the strategies proposed so far suggest compatible descriptions inside the effective horizon but they lead to sharply different answers when the wavelengths of the gravitons exceed the Hubble radius by remaining shorter than the typical extension of causally connected patches. [...] arXiv:1908.09679; CERN-PH-TH-2019-131; CERN-TH-2019-131.- 2019-10-22 - 17 p. - Published in : Phys. Rev. D 100 (2019) 083531 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF;

2019-08-28
04:39
 A lower bound on the primordial black hole merger rate / Vaskonen, Ville (King's Coll. London ; NICPB, Tallinn) ; Veermäe, Hardi (NICPB, Tallinn ; CERN) We derive a lower bound on the merger rate of primordial black hole (PBH) binaries by estimating the maximal fraction of binaries that were perturbed between formation in the early universe and merger, and computing a conservative merger rate of perturbed binaries. This implies robust constraints on the PBH abundance in the range $1-100 M_\odot$. [...] arXiv:1908.09752; CERN-TH-2019-141; KCL-PH-TH/2019-69.- 2020-02-19 - 7 p. - Published in : Phys. Rev. D 101 (2020) 043015 Fulltext: PDF;

2019-08-19
04:44
 A tale of two exponentiations in ${\cal N}=8$ supergravity / Di Vecchia, Paolo (Nordita ; Bohr Inst.) ; Luna, Andrés (UCLA) ; Naculich, Stephen G. (Bowdoin Coll.) ; Russo, Rodolfo (Queen Mary, U. of London) ; Veneziano, Gabriele (CERN ; College de France) ; White, Chris D. (Queen Mary, U. of London) The structure of scattering amplitudes in supergravity theories continues to be of interest. Recently, the amplitude for $2\rightarrow 2$ scattering in ${\cal N}=8$ supergravity was presented at three-loop order for the first time. [...] arXiv:1908.05603; BOW-PH-166; NORDITA 2019-076; QMUL-PH-19-20; CERN-TH-2019-133.- 2019-11-10 - 7 p. - Published in : Phys. Lett. B 798 (2019) 134927 Article from SCOAP3: PDF; Fulltext: PDF;

2019-08-14
05:35
 Numerical exploration of three relativistic particles in a finite volume including two-particle resonances and bound states / Romero-López, Fernando (Valencia U., IFIC) ; Sharpe, Stephen R. (Washington U., Seattle) ; Blanton, Tyler D. (Washington U., Seattle) ; Briceño, Raúl A. (Jefferson Lab ; Old Dominion U.) ; Hansen, Maxwell T. (CERN) In this work, we use an extension of the quantization condition, given in Ref. [1], to numerically explore the finite-volume spectrum of three relativistic particles, in the case that two-particle subsets are either resonant or bound. [...] arXiv:1908.02411; JLAB-THY-19-3011; CERN-TH-2019-129.- 2019-10-03 - 42 p. - Published in : JHEP 1910 (2019) 007 Article from SCOAP3: PDF; Fulltext: PDF; External link: JLab Document Server

2019-08-08
05:29
 Black Hole Binary Dynamics from the Double Copy and Effective Theory / Bern, Zvi (UCLA ; CERN) ; Cheung, Clifford (Caltech, Pasadena (main)) ; Roiban, Radu (Penn State U., University Park, IGC) ; Shen, Chia-Hsien (UCLA) ; Solon, Mikhail P. (Caltech, Pasadena (main)) ; Zeng, Mao (Zurich, ETH) We describe a systematic framework for computing the conservative potential of a compact binary system using modern tools from scattering amplitudes and effective field theory. Our approach combines methods for integration and matching adapted from effective field theory, generalized unitarity, and the double-copy construction, which relates gravity integrands to simpler gauge-theory expressions. [...] arXiv:1908.01493; CERN-TH-2019-128; CALT-TH 2019-026; UCLA/TEP/2019/103.- 2019-10-21 - 134 p. - Published in : JHEP 1910 (2019) 206 Article from SCOAP3: PDF; Fulltext: PDF;