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- W2883544891 abstract "We consider a dark matter scenario in the context of the minimal extension of the Standard Model (SM) with a <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:math> (baryon number minus lepton number) gauge symmetry, where three right-handed neutrinos with a <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M4><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:math> charge <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M5><mml:mo>-</mml:mo><mml:mn mathvariant=normal>1</mml:mn></mml:math> and a <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M6><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:math> Higgs field with a <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M7><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:math> charge <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M8><mml:mo>+</mml:mo><mml:mn mathvariant=normal>2</mml:mn></mml:math> are introduced to make the model anomaly-free and to break the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M9><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:math> gauge symmetry, respectively. The <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M10><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:math> gauge symmetry breaking generates Majorana masses for the right-handed neutrinos. We introduce a <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M11><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Z</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant=normal>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> symmetry to the model and assign an odd parity only for one right-handed neutrino, and hence the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M12><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Z</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant=normal>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>-odd right-handed neutrino is stable and the unique dark matter candidate in the model. The so-called minimal seesaw works with the other two right-handed neutrinos and reproduces the current neutrino oscillation data. We consider the case that the dark matter particle communicates with the SM particles through the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M13><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:math> gauge boson (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M14><mml:mrow><mml:msubsup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>′</mml:mi></mml:mrow></mml:msubsup></mml:mrow></mml:math> boson) and obtain a lower bound on the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M15><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:math> gauge coupling (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M16><mml:mrow><mml:msub><mml:mrow><mml:mi>α</mml:mi></mml:mrow><mml:mrow><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>) as a function of the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M17><mml:mrow><mml:msubsup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>′</mml:mi></mml:mrow></mml:msubsup></mml:mrow></mml:math> boson mass (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M18><mml:mrow><mml:msub><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>′</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:msub></mml:mrow></mml:math>) from the observed dark matter relic density. On the other hand, we interpret the recent LHC Run-2 results on the search for a <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M19><mml:mrow><mml:msup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>′</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math> boson resonance to an upper bound on <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M20><mml:mrow><mml:msub><mml:mrow><mml:mi>α</mml:mi></mml:mrow><mml:mrow><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> as a function of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M21><mml:mrow><mml:msub><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>′</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:msub></mml:mrow></mml:math>. These two constraints are complementary for narrowing down an allowed parameter region for this “<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M22><mml:mrow><mml:msup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>′</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math> portal” dark matter scenario, leading to a lower mass bound of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M23><mml:msub><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>′</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:msub><mml:mo>≥</mml:mo><mml:mn mathvariant=normal>3.9</mml:mn></mml:math> TeV." @default.
- W2883544891 created "2018-08-03" @default.
- W2883544891 creator A5055300218 @default.
- W2883544891 date "2018-07-15" @default.
- W2883544891 modified "2023-10-17" @default.
- W2883544891 title "<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mrow><mml:msup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi>′</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math> Portal Dark Matter in the Minimal <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mi>B</mml:mi><mml:mo>-</mml:mo><mml:mi>L</mml:mi></mml:math> Model" @default.
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- W2883544891 doi "https://doi.org/10.1155/2018/5340935" @default.
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