Articles with "ell ell" as a keyword



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On Tree-Connectivity and Path-Connectivity of Graphs

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Published in 2021 at "Graphs and Combinatorics"

DOI: 10.1007/s00373-021-02376-9

Abstract: Let G be a graph and k an integer with $$2\le k\le n$$ 2 ≤ k ≤ n . The k -tree-connectivity of G , denoted by $$\kappa _k(G)$$ κ k ( G ) ,… read more here.

Keywords: integer; connectivity; ell ell; tree connectivity ... See more keywords
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Limits on 331 vector bosons from LHC proton collision data

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Published in 2020 at "Physical Review D"

DOI: 10.1103/physrevd.101.035017

Abstract: In this paper, limits are set on bileptons masses and couplings in the context of the the 331 Model, as well as generic, non-331 Models predicting bileptons. The following measurable processes are studied: $pp \rightarrow… read more here.

Keywords: vector bosons; 331 vector; rightarrow ell; ell ell ... See more keywords
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Search for light sterile neutrinos from W± decays at the LHC

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Published in 2020 at "Physical Review D"

DOI: 10.1103/physrevd.101.035022

Abstract: We study the feasibility to observe sterile neutrinos with masses in the range 5 GeV $< m_N < 20$ GeV at the LHC, using exclusive semileptonic modes involving pions, $W\to \ell N \to \pi \ell\ell,… read more here.

Keywords: light sterile; decays lhc; sterile neutrinos; neutrinos decays ... See more keywords
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Dark photon manifestation in the triplet-like QED processes $\gamma + \ell_i \to \ell^+_j \ell^-_j + \ell_i$, $i\neq j,$ $i=e, \mu,$ $j=e, \mu,\tau$

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Published in 2020 at "Physical Review D"

DOI: 10.1103/physrevd.101.075049

Abstract: The tripletlike QED processes γ+li→lj+lj-+li with i≠j and i=e, μ, j=e, μ, τ has been investigated as the reactions where a dark photon A′ is produced as a virtual state with a subsequent decay into… read more here.

Keywords: photon manifestation; ell ell; qed processes; dark photon ... See more keywords
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Exploiting CP asymmetries in rare charm decays

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Published in 2020 at "Physical Review D"

DOI: 10.1103/physrevd.101.115006

Abstract: We analyze patterns from CP-violating new physics (NP) in hadronic and semileptonic rare charm $\vert \Delta c \vert=\vert \Delta u\vert=1$ transitions. Observation of direct CP-violation in hadronic decays, as in $\Delta A_{\text{CP}}$, provides opportunities for… read more here.

Keywords: charm; rare charm; vert; delta text ... See more keywords
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UV physics from IR features: New prospects from top flavor violation

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Published in 2023 at "Physical Review D"

DOI: 10.1103/physrevd.107.095025

Abstract: New physics in the rare top decays $t \to q \ell^+\ell^-$ is currently very weakly constrained. We show that in a large class of Standard Model extensions, existing experimental constraints on new physics in flavor-conserving… read more here.

Keywords: physics; violation; ell ell; features new ... See more keywords
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Implications from ${B\to K^*\ell^+\ell^-}$ observables using $3 \text{fb}^{-1}$ of LHCb data

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Published in 2017 at "Physical Review D"

DOI: 10.1103/physrevd.95.014026

Abstract: The decay mode $B\to K^*\ell^+\ell^-$ results in the measurement of a large number of related observables by studying the angular distribution of the decay products and is regarded as a sensitive probe of physics beyond… read more here.

Keywords: ell observables; ell ell; implications ell; physics ... See more keywords
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Towards the discovery of new physics with lepton-universality ratios of $b\to s\ell\ell$ decays

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Published in 2017 at "Physical Review D"

DOI: 10.1103/physrevd.96.093006

Abstract: Author(s): Geng, Li-Sheng; Grinstein, Benjamin; Jaeger, Sebastian; Camalich, Jorge Martin; Ren, Xiu-Lei; Shi, Rui-Xiang | Abstract: Tests of lepton-universality as rate ratios in $b\to s \ell\ell$ transitions can be predicted very accurately in the Standard… read more here.

Keywords: lepton universality; universality ratios; ell ell; ratios ell ... See more keywords
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Enhanced pair production of heavy Majorana neutrinos at the LHC

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Published in 2018 at "Physical Review D"

DOI: 10.1103/physrevd.97.115023

Abstract: Towards experimental confirmations of the type-I seesaw mechanism, we explore a prospect of discovering the heavy Majorana right-handed neutrinos (RHNs) from a resonant production of a new massive gauge boson ($Z^{\prime}$) and its subsequent decay… read more here.

Keywords: ell ell; production; model; heavy majorana ... See more keywords
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Form factors for the rare $\Lambda_{b}(\Lambda_{b}^*)\rar N\ell^+\ell^- $ decays in light cone QCD sum rules

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Published in 2018 at "Physical Review D"

DOI: 10.1103/physrevd.98.035033

Abstract: Form factors of the rare $\Lambda_{b}(\Lambda_{b}^*)\to N\ell^{+}\ell^{-}$ decays are calculated in the framework of the light cone QCD sum rules by taking into account of the contributions from the negative parity baryons. Using the obtained… read more here.

Keywords: form factors; ell ell; ell decays; rar ell ... See more keywords
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Lepton flavor violating $$\Lambda _b\rightarrow \Lambda \ell _1\ell _2$$ decay

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Published in 2019 at "European Physical Journal C"

DOI: 10.1140/epjc/s10052-019-7530-9

Abstract: Inspired by the recent hints of lepton flavor universality violation in \(b\rightarrow s\ell \ell \) and \(b\rightarrow c\ell \nu \) transitions, we study lepton flavor violating exclusive \(\Lambda _b\rightarrow \Lambda \ell _1^+\ell _2^-\) (\(\ell _1\ne… read more here.

Keywords: lepton flavor; ell ell; rightarrow; lambda rightarrow ... See more keywords