O(100  GeV)deci-weakW′/Z′at Tevatron and LHC

Abstract

Recently Tevatron released their measurements on invariant mass spectrum of electron/positron, as well as the di-jet arising from WW+WZ production with one W leptonically decay. Though the statistics is not significant, there are two bumps around 240 GeV and 120-160 GeV respectively. We proposed that the two bumps correspond to the extra light gauge bosons Z ′ and W ′ , which couple with quarks with the deci-weak strength.In this brief report, we also simulated di-jet invariant mass distribution at the current running LHC.

Higher radial and orbital excitations in the charmed meson family

“…However, calculation by the constituent quark model shows that the D (1 3 D 3 ) assignment of D * (2760) cannot be excluded [52], which is also supported by the works in Refs. [51,53,55,58].…”

Higher excitations of theDandDsmesons

“…The quantum numbers and decay modes of the new resonances were intensely discussed in a large number of recent studies [7][8][9][10][11][12][13][14] and also before in [15][16][17][18][19][20][21][22][23][24][25]. For D Ã s1 ð2710Þ the quantum numbers J P ¼ 1 À were assigned [4,7], although the analysis in Ref.…”

“…The wide resonance D sJ ð3040Þ is mostly assumed to be the 2P state with J P ¼ 1 þ [11]. The quantum numbers of the new D 0 resonances and their isotopic partners were discussed in [12][13][14], where the broad resonance Dð2550Þ (À $ 130 MeV) is considered as the singlet 2 1 S 0 state, for which a large width as in experiment was obtained in Ref. [12], while a much smaller total width was calculated in [13].…”

Strong decays of DJ(3000) and DsJ(3040)<

“…In the charmed family, BABAR announced four resonances in 2010, namely, Dð2550Þ, D Ã ð2600Þ, Dð2750Þ, and D Ã ð2760Þ [5]. By analyzing the helicity distribution, the first two are identified as a 2S doublet with unnatural and natural parity, while the latter two are good candidates for D-wave states; the assumption corresponds to their strong decays in theoretical calculations [6]. …”

“…Apart from an instantaneous Bethe-Salpeter approach, several other methods can describe the form factor and hadronic transition, such as a nonrelativistic quark model [18]; heavy effective theory [19]; effective Lagrangian approach based on heavy quark chiral symmetry [20]; Eichten, Hill, and Quigg (EHQ) decay formula [21]; quark pair creation (QPC) models [22]; lattice QCD [23]; QCD sum rules [24]; Dyson-Schwinger-equation approach [25]; and AdS-QCD method [26].…”