2018/11/30 by Eung Jin Chun, Arindam Das, Jinsu Kim +1 · 30 citations
Physics and Astronomy · Social Sciences · #Boson #Gauge (firearms) #Gauge boson #Gauge theory #International Science and Diplomacy #Large Hadron Collider #Lepton #Neutrino #Neutrino Physics Research #Particle physics theoretical and experimental studies #Universality (dynamical systems) #hep-ph
paper · pdf · doi:10.1007/jhep02(2019)093
published in Journal of High Energy Physics 2019(2) (Springer Nature) · v3: updated LHC bounds for B-3L_i models
openalex created_date 2018/11/16 · openalex publication_date 2019/02/01 · arxiv created 2019/07/15 · arxiv updated 2019/07/17 · openalex updated_date 2026/08/08
A bstract Standard Model may allow an extended gauge sector with anomaly-free flavored gauge symmetries, such as L i − L j , B i − L j , and B −3 L i , where i, j = 1 , 2 , 3 are flavor indices. We investigate phenomenological implications of the new flavored gauge boson Z ′ in the above three classes of gauge symmetries. Focusing on the gauge boson mass above 5 GeV, we use the lepton universality test in the Z and τ /μ decays, LEP searches, LHC searches, neutrino trident production bound, and LHC Z → 4 μ searches to put constraints on the g ′ − M Z ′ plane. When L 1 is involved, the LEP bounds on the e − e + → ℓ − ℓ + processes give the most stringent bounds, while the LHC bound becomes the strongest constraints in the large MZ′ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>M</mml:mi> <mml:msup> <mml:mi>Z</mml:mi> <mml:mo>′</mml:mo> </mml:msup> </mml:msub> </mml:math> region when B i is involved. The bound from Z → 4 μ productions, which is applicable for L 2 -involved scenarios, provides stringent bounds in the small MZ′ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>M</mml:mi> <mml:msup> <mml:mi>Z</mml:mi> <mml:mo>′</mml:mo> </mml:msup> </mml:msub> </mml:math> region. One exception is the B − 3 L 2 scenario, in which case only a small region is favored due to the lepton universality.