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The X17 particle (X17 boson) is a hypothetical subatomic particle proposed by Attila Krasznahorkay and his colleagues to explain certain anomalous measurement results; these anomalous measurements are known as ATOMKI anomaly or beryllium (8 Be) anomaly or X17 anomaly.
The Higgs boson is postulated by the electroweak theory primarily to explain the origin of particle masses. In a process known as the "Higgs mechanism", the Higgs boson and the other gauge bosons in the Standard Model acquire mass via spontaneous symmetry breaking of the SU(2) gauge symmetry.
An X boson would have the following two decay modes: [1]: 442 X + → u L + u R X + → e + L + d R. where the two decay products in each process have opposite chirality, u is an up quark, d is a down antiquark, and e + is a positron. A Y boson would have the following three decay modes: [1]: 442 Y + → e + L + u R Y
The dark photon is a spin-1 boson associated with a U(1) gauge field, ... Hungary, suggested the existence of a new, light spin-1 boson, dubbed the X17 particle, ...
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(2016) [22] proposed that a protophobic (i.e. "proton-ignoring") X-boson with a mass of 16.7 MeV with suppressed couplings to protons relative to neutrons and electrons and femtometer range could explain the data. [23] The force may explain the muon g − 2 anomaly and provide a dark matter candidate. Several research experiments are underway ...
The name boson was coined by Paul Dirac [3] [4] to commemorate the contribution of Satyendra Nath Bose, an Indian physicist. When Bose was a reader (later professor) at the University of Dhaka, Bengal (now in Bangladesh), [5] [6] he and Albert Einstein developed the theory characterising such particles, now known as Bose–Einstein statistics and Bose–Einstein condensate.
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