7,454 research outputs found

    Lepton flavor violating μeγ\mu\to e\gamma and μe\mu-e conversion in unparticle physics

    Full text link
    We have studied lepton flavor violation processes μeγ\mu\to e\gamma and μe\mu-e conversion in nuclei induced by unparticle. Both Br(μeγ){\rm Br}(\mu\to e\gamma) and μe\mu-e conversion rate CR(μe,Nuclei){\rm CR}(\mu-e,{\rm Nuclei}) strongly depend on the scale dimension dUd_{\cal U} and the unparticle coupling λKff\lambda^{ff'}_{\rm K}(K=V, A, S, P). Present experimental upper bounds on Br(μeγ){\rm Br}(\mu\to e\gamma), CR(μe,Ti){\rm CR}(\mu-e,{\rm Ti}) and CR(μe,Au){\rm CR}(\mu-e,{\rm Au}) put stringent constraints on the parameters of unaprticle physics. The scale dimensions dUd_{\cal U} around 2 are favored for the unparticle scale ΛU\Lambda_{\cal U} of O(10TeV){\cal O}(10 {\rm TeV}) and the unparticle coupling of O(103){\cal O}(10^{-3}). CR(μe,Nuclei){\rm CR}(\mu-e,{\rm Nuclei}) is proportional to Zeff4A2/Z\rm{Z^4_{eff}A^2/Z} for the pure vector and scalar couplings between unparticle and SM fermions, this peculiar atomatic number dependence can be used to distinguish unparticle from other theoretical models.Comment: 16 pages, 5 figure

    Status and prospects of `bi-large' leptonic mixing

    Full text link
    Bi-large patterns for the leptonic mixing matrix are confronted with current neutrino oscillation data. We analyse the status of these patterns and determine, through realistic simulations, the potential of upcoming long-baseline experiment DUNE in testing bi-large \emph{ansatze} and discriminating amongst them.Comment: 14 pages, 7 figures, numerical results refined, some more discussion added. Matches published version of Phys. Let.

    CP Symmetries as Guiding Posts: Revamping Tri-Bi-Maximal Mixing-I

    Full text link
    We analyze the possible generalized CP symmetries admitted by the Tri-Bi-Maximal (TBM) neutrino mixing. Taking advantage of these symmetries we construct in a systematic way other variants of the standard TBM ansatz. Depending on the type and number of generalized CP symmetries imposed, we get new mixing matrices, all of which related to the original TBM matrix. One of such "revamped" TBM variants is the recently discussed mixing matrix of arXiv:1806.03367. We also briefly discuss the phenomenological implications following from these mixing patterns.Comment: 21 pages, 4 figure

    The Correlation Between Spectral Index And Accretion Rate For AGN

    Full text link
    In this paper, we present a correlation between the spectral index distribution (SED) and the dimensionless accretion rate defined as m˙=Lbol/LEdd\dot{m}={L_{bol}/L_{Edd}} for AGN. This quantity is used as a substitute of the physical accretion rate. We select 193 AGN with both broad Hα\alpha and broad Hβ\beta, and with absorption lines near MgIλ5175A˚\lambda5175\AA from SDSS DR4. We determine the spectral index and dimensionless accretion rate after correcting for both host galaxy contribution and internal reddening effects. A correlation is found between the optical spectral index and the dimensionless accretion rate for AGN, including low luminosity AGN (LHα<1041ergs1L_{H\alpha}<10^{41}{\rm erg\cdot s^{-1}} sometimes called "dwarf AGN" (Ho et al. 1997)). The existence of this correlation provides an independent method to estimate the central BH masses for all types of AGN. We also find that there is a different correlation between the spectral index and the BH masses for normal AGN and low luminosity AGN, which is perhaps due to the different accretion modes in these two types of nuclei. This in turn may lead to the different correlations between BH masses and optical continuum luminosity reported previously (Zhang et al. 2007a), which invalidates the application of the empirical relationship found by Kaspi et al. (2000, 2005) to low luminosity AGN in order to determine their BLR sizes.Comment: 10 pages, 7 figures, accepted for publication in MNRA

    Influence of Advertisement Message on Fitbar Billboard Towards Brand Awareness and Its Implication to Brand Image

    Full text link
    The assumption that snacks could cause problem in diet and bodyweight, makes this study interesting. Because this product, Fitbar, appears on the market as a healthy snack that is contrary to this assumption. This product is about to prove that there is a healthy and tasty snack as snacks. Marketing communications through advertising billboards with the media aims to reach the target market. Fitbar billboard ads convey the message content in the form of information about the attributes and benefits of products such as nutritional content and product slogans. This study uses path analysis techniques to determine the effect of variable X (advertisement message) to variable Y (brand awareness) and its implications on the variable Z (brand image). The results showed that the content of the message components such as message structure, message display, message format, and the source of the message have contributed in the formation of brand awareness, which further on has implications on brand image. Influence on brand awareness message content is equal to 0.609. The effect of variable X (message) and Y (brand awareness) to variable Z (brand image) amounted to 0,365. Therefore, the use of billboards media in conveying the message to the target market of Fitbar products is to build brand awareness and the implications for brand image

    Spectroscopy of q3qˉ3\rm{q}^3\bar{\rm{q}}^3-States in Quark Model and Baryon-Antibaryon Enhancements

    Full text link
    We study the mass spectrum of the q3qˉ3\rm{q}^3\bar{\rm{q}}^3 mesons both from the quark model with triquark correlations and from common quark model with colormagnetic interactions and with relative S-waves between quarks. Two cluster configurations (q3)(qˉ3)(\rm{q}^3)-(\bar{\rm{q}}^3) and (q2qˉ)(qqˉ2)(\rm{q}^2\bar{\rm{q}})-(\rm{q}\bar{\rm{q}}^2) are considered. In the spectrum we find rather stable states which have the same quantum number with particle resonances which are corresponding to the ppˉp\bar{p} enhancement, pΛˉp\bar{\Lambda} enhancement and ΛΛˉ\Lambda\bar{\Lambda} enhancement with spin-0\mathbf{0} or 1\mathbf{1}. This imply these enhancements are NOT experimental artifacts. The color-spin-flavor structures of ppˉp\bar{p}, pΛˉp\bar{\Lambda}, and ΛΛˉ\Lambda\bar{\Lambda} enhancements are revealed. The existence of spin-1\mathbf{1} ΛΛˉ,pΛˉ,ppˉ\Lambda\bar{\Lambda}, p\bar{\Lambda}, p\bar{p} enhancements is predicted.Comment: 45 pages, 5 figure
    corecore