# TH Articles

Senast inlagda poster:
2022-02-22
04:12
 Models with (broken) $\mathbb{Z}$$_{2} symmetries / Robens, Tania (Boskovic Inst., Zagreb ; CERN) I discuss the allowed parameter space as well as collider prospects of several new physics models containing (broken) \mathbb{Z}$$_{2}$ symmetries. I focus on effects of current constraints on these, and touch on several future collider options.. arXiv:2202.09636; RBI-ThPhys-2022-05; CERN-TH-2022-019.- 2022-03-03 - 6 p. - Published in : PoS DISCRETE2020-2021 (2022) 063 Fulltext: document - PDF; 2202.09636 - PDF; In : 7th Symposium on Prospects in the Physics of Discrete Symmetries, Bergen, Norway, 29 Nov - 3 Dec 2021, pp.063

2022-01-21
04:06
 Singlet channel scattering in a Composite Higgs model on the lattice / Drach, Vincent (Plymouth U.) ; Fritzsch, Patrick (Plymouth U. ; Trinity Coll., Dublin) ; Rago, Antonio (Plymouth U. ; CERN) ; Romero-López, Fernando (Valencia U., IFIC) We present the first calculation of the scattering amplitude in the singlet channel beyond QCD. The calculation is performed in $SU(2)$ gauge theory with $N_f=2$ fundamental Dirac fermions and based on a finite-volume scattering formalism. [...] arXiv:2107.09974; CERN-TH-2021-221.- 2022-01-19 - 10 p. - Published in : Eur. Phys. J. C 82 (2022) 47 Fulltext: document - PDF; 2107.09974 - PDF;

2022-01-19
08:05
 Dark radiation constraints on light primordial black holes / Auffinger, Jérémy (IP2I, Lyon) ; Arbey, Alexandre (IP2I, Lyon ; CERN ; IUF, Paris) ; Sandick, Pearl (Utah U.) ; Haghi, Barmak Shams Es (Utah U.) ; Sinha, Kuver (Oklahoma U.) Light black holes could have formed in the very early universe through the collapse of large primordial density fluctuations. These primordial black holes (PBHs), if light enough, would have evaporated by now because of the emission of Hawking radiation; thus they could not represent a sizable fraction of dark matter today. [...] arXiv:2201.04946; CERN-TH-2021-169.- 2022 - 6 p. - Published in : PoS EPS-HEP2021 (2022) 147 Fulltext: document - PDF; 2201.04946 - PDF; In : European Physics Society conference on High Energy Physics 2021, Online, Online, 26 - 30 Jul 2021, pp.147

2022-01-12
04:16
 Discrete R-symmetry, various energy scales, and gravitational waves / Choi, Gongjun (CERN) ; Lin, Weikang (Shanghai Jiao Tong U.) ; Yanagida, Tsutomu T. (Shanghai Jiao Tong U. ; Tokyo U.) We present a supersymmetric model where energy scales of a discrete $R$-symmetry breaking ($Z_{6R}$) and cosmic inflation are commonly attributed to the confinement scale of a hidden $Sp(2)$ strong dynamics. Apart from these, SUSY-breaking scale, the Higgsino mass and the right-handed neutrino masses are all shown to stem from $Z_{6R}$ breaking scale inferred from CMB observables. [...] arXiv:2201.03083; CERN-TH-2022-002.- 2022-03-01 - 28 p. - Published in : Phys. Rev. D 105 (2022) 055033 Fulltext: PhysRevD.105.055033 - PDF; 2201.03083 - PDF;

2022-01-04
04:16
 Gravitational portals in the early Universe / Clery, Simon (IJCLab, Orsay) ; Mambrini, Yann (IJCLab, Orsay ; CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.) We consider the production of matter and radiation during reheating after inflation, restricting our attention solely to gravitational interactions. Processes considered are the exchange of a graviton, $h_{\mu \nu}$, involved in the scattering of the inflaton or particles in the newly created radiation bath. [...] arXiv:2112.15214; UMN-TH-4110/22; FTPI-MINN-22/02; CERN-TH-2021-222.- 2022-04-01 - 15 p. - Published in : Phys. Rev. D 105 (2022) 075005 Fulltext: PDF;

2021-12-24
09:18
 Top-pair production at the LHC with MiNNLO$_{\rm PS}$ / Mazzitelli, Javier (Munich, Max Planck Inst.) ; Monni, Pier Francesco (CERN) ; Nason, Paolo (INFN, Milan Bicocca) ; Re, Emanuele (INFN, Milan Bicocca ; Annecy, LAPTH) ; Wiesemann, Marius (Munich, Max Planck Inst.) ; Zanderighi, Giulia (Munich, Max Planck Inst. ; Tech. U., Munich (main)) We consider the production of a pair of heavy quarks and illustrate the derivation of the MiNNLO method to match next-to-next-to-leading order calculations with parton showers (NNLO+PS) for this class of processes. As a first application, we construct an event generator for the fully differential simulation of hadronic top-quark pair production at NNLO+PS and discuss all details of its implementation in a parton shower Monte Carlo framework. [...] arXiv:2112.12135; CERN-TH-2021-220; MPP-2021-211; LAPTH-046/21; CERN-TH-2021-220,MPP-2021-211,LAPTH-046/21.- 2022-04-13 - 55 p. - Published in : JHEP 2204 (2022) 079 Fulltext: document - PDF; 2112.12135 - PDF;

2021-12-23
04:54
 Disentangling the Regge cut and Regge pole in perturbative QCD / Falcioni, Giulio (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Gardi, Einan (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Maher, Niamh (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Milloy, Calum (INFN, Turin ; Turin U.) ; Vernazza, Leonardo (INFN, Turin ; Turin U. ; CERN) The high-energy limit of gauge-theory amplitudes features both a Regge pole and Regge cuts. We show how to disentangle these, and hence how to determine the Regge trajectory beyond two loops. [...] arXiv:2112.11098; CERN-TH-2021-225.- 2022-03-30 - 7 p. - Published in : Phys. Rev. Lett. 128 (2022) 132001 Fulltext: PhysRevLett.128.132001 - PDF; 2112.11098 - PDF;

2021-12-21
04:55
 On-shell Higgsing for EFTs / Balkin, Reuven (Technion) ; Durieux, Gauthier (CERN) ; Kitahara, Teppei (Nagoya U., ISEE ; KMI, Nagoya) ; Shadmi, Yael (Technion) ; Weiss, Yaniv (Technion) We study the on-shell version of the Higgs mechanism in effective theories (EFTs) containing particles of different spins, focusing on contact terms as a simple starting point. We derive the massive contact terms and their coefficients from the massless amplitudes of the EFT above the symmetry breaking scale, by covariantizing the massless contact terms under the massive little group. [...] arXiv:2112.09688; CERN-TH-2021-212.- 2022-03-21 - 41 p. - Published in : JHEP 2203 (2022) 129 Fulltext: 2112.09688 - PDF; document - PDF;

2021-12-16
18:05
 Implications of LHCb Data for Lepton Flavour Universality Violation / Neshatpour, Siavash (INFN, Naples) ; Hurth, Tobias (U. Mainz, PRISMA) ; Mahmoudi, Farvah (CERN ; IP2I, Lyon) ; Martinez Santos, Diego (Santiago de Compostela U.) We analyse the new physics implications of theoretically clean $b \to s$ observables in a model-independent approach and compare their coherence with the implications of other rare $B$-decays. A statistical comparison is done between the New Physics explanation and hadronic contributions as the source of the anomalies in angular observables of the $B\to K^*\mu\mu$ decay. [...] arXiv:2112.08343; CERN-TH-2021-180; MITP-21-053.- 2022 - 6 p. - Published in : PoS: EPS-HEP2021 (2022) , pp. 564 Fulltext: 2112.08343 - PDF; document - PDF; In : European Physics Society conference on High Energy Physics 2021, Online, Online, 26 - 30 Jul 2021, pp.564

2021-12-15
09:37
 Hadron collider probes of the quartic couplings of gluons to the photon and $Z$ boson / Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Ge, Shao-Feng (Shanghai Jiaotong U. ; Tsung-Dao Lee Inst., Shanghai ; Shanghai Jiao Tong U.) ; Ma, Kai (Shanghai Jiaotong U. ; Tsung-Dao Lee Inst., Shanghai ; HIAS, UCAS, Hangzhou ; ICTP-AP, Beijing ; Shaanxi U. Tech.) We explore the experimental sensitivities of measuring the $gg \rightarrow Z \gamma$ process at the LHC to the dimension-8 quartic couplings of gluon pairs to the $Z$ boson and photon, in addition to comparing them with the analogous sensitivities in the $gg \to \gamma \gamma$ process. These processes can both receive contributions from 4 different CP-conserving dimension-8 operators with distinct Lorentz structures that contain a pair of gluon field strengths, $\hat G^a_{\mu \nu}$, and a pair of electroweak SU(2) gauge field strengths, $W^i_{\mu \nu}$, as well as 4 similar operators containing a pair of $\hat G^a_{\mu \nu}$ and a pair of U(1) gauge field strengths, $B_{\mu \nu}$. [...] arXiv:2112.06729; KCL-PH-TH/2021-95; CERN-TH-2021-215.- 2022-04-21 - 28 p. - Published in : JHEP 2204 (2022) 123 Fulltext: 2112.06729 - PDF; document - PDF;