Tsinghua University

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Showing 2012 · hep-exShow all

73 papers · 2 filters

hep-ex2012★ 11 cited

First observation of the decays $B ˉ_{(s)}^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ and $B ˉ_{s}^{0} \to D_{s 1} (2536)^{+} π^{-}$

LHCb collaboration, R. Aaij, C. Abellan Beteta +621

The first observation of the decays $B ˉ_{s}^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ and $B ˉ^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ are reported using an integrated luminosity of 1.0 fb $^{- 1}$ recorded by the…

hep-ex2012★ 17 cited

Measurement of CP observables in B0 -> D K*0 with D -> K+ K-

LHCb collaboration, R. Aaij, C. Abellan Beteta +625

The decay B0 -> D K*0 and the charge conjugate mode are studied using 1.0fb-1 of pp collision data collected by the LHCb experiment at sqrt(s) = 7TeV in 2011. The CP asymmetry betw…

hep-ex2012★ 26 cited

Measurement of the forward energy flow in pp collisions at sqrt(s)=7 TeV

LHCb collaboration, R. Aaij, C. Abellan Beteta +628

The energy flow created in pp collisions at sqrt(s)=7 TeV is studied within the pseudorapidity range 1.9<eta<4.9 with data collected by the LHCb experiment. The measurements are pe…

hep-ex2012★ 53 cited

Measurement of J/psi production in pp collisions at sqrt(s)=2.76 TeV

LHCb collaboration, R. Aaij, C. Abellan Beteta +624

The production of J/psi mesons is studied with the LHCb detector using data from pp collisions at sqrt(s)=2.76 TeV corresponding to an integrated luminosity of 71 nb^-1. The differ…

hep-ex2012★ 38 cited

Study of the near-threshold $ω ϕ$ mass enhancement in doubly OZI suppressed $J / ψ \to γ ω ϕ$ decays

M. Ablikim, M. N. Achasov, O. Albayrak +348

A 2.25 $\times 1 0^{8}$ $\jpsi$ event sample accumulated with the BESIII detector is used to study the doubly OZI suppressed decay modes $\jpsi\toγ\of$, $ω\to\ppp$, $ϕ\to\kk$. A strong…

hep-ex2012★ 346 cited

Improved Measurement of Electron Antineutrino Disappearance at Daya Bay

Daya Bay Collaboration, F. P. An, Q. An +227

We report an improved measurement of the neutrino mixing angle $θ_{13}$ from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for $sin^{2} 2 θ_{13}$ with a significan…

hep-ex2012★ 391 cited

First evidence for the decay Bs -> mu+ mu-

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

A search for the rare decays Bs->mu+mu- and B0->mu+mu- is performed using data collected in 2011 and 2012 with the LHCb experiment at the Large Hadron Collider. The data samples co…

hep-ex2012★ 26 cited

Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays

LHCb collaboration, R. Aaij, C. Abellan Beteta +622

This Letter reports a measurement of the CP violation observables S_J/ψKS0 and C_J/ψKS0 in the decay channel B0 -> J/ψ KS0 performed with 1.0/fb of pp collisions at sqrt(s) = 7 TeV…

hep-ex2012★ 62 cited

First observation of the decay $B_{s 2}^{} (5840)^{0} \to B^{+} K^{-}$ and studies of excited $B_{s}$ mesons

LHCb collaboration, R. Aaij, C. Abellan Beteta +621

Properties of the orbitally excited (L=1) $B_{s}$ states are studied using 1.0 fb $^{- 1}$ of pp collisions at $s = 7$ TeV collected with the LHCb detector. The first observation…

hep-ex2012★ 18 cited

Measurements of psi'-> pbar K+ sigma0 and chi_cj->pbar K+ Lambda

BESIII Collaboration

Using a sample of $1.06 \times 1 0^{8}$ $ψ^{'}$ mesons collected with the BESIII detector at the BEPCII $e^{+} e^{-}$ collider and $χ_{c J}$ mesons produced via radiative transitions from…

hep-ex2012★ 11 cited

Search for $η$ and $η^{'} \to π^{+} e^{-} ν ˉ_{e} + c . c .$ decays in $\jpsi \to ϕη$ and $ϕ η^{'}$

M. Ablikim, M. N. Achasov, O. Albayrak +362

Using a sample of 225.3 million $\jpsi$ events collected with the BESIII detector at the BEPCII $e^{+} e^{-}$ collider in 2009, searches for the decays of $η$ and $η^\prime\toπ^+ e^- \b…

hep-ex2012★ 24 cited

Measurements of Baryon Pair Decays of $χ_{c J}$ Mesons

M. Ablikim, M. N. Achasov, O. Albayrak +348

Using 106 $\times 1 0^{6}$ $ψ^{'}$ decays collected with the BESIII detector at the BEPCII, three decays of $χ_{c J}$ ( $J = 0, 1, 2$ ) with baryon pairs ($\llb$, $\ssb$, $\SSB$) in t…

hep-ex2012★ 91 cited

Observation of D0-D0bar oscillations

LHCb collaboration, R. Aaij, C. Abellan Beteta +616

We report a measurement of the time-dependent ratio of D0->K+pi- to D0->K-pi+ decay rates in D*+-tagged events using 1.0 fb^{-1} of integrated luminosity recorded by the LHCb exper…

hep-ex2012★ 59 cited

Measurement of the ratio of branching fractions BR(B0 -> K0 gamma)/BR(Bs0 -> phi gamma) and the direct CP asymmetry in B0 -> K0 gamma

LHCb collaboration, R. Aaij, C. Abellan Beteta +621

The ratio of branching fractions of the radiative B decays B0 -> K*0 gamma and Bs0 phi gamma has been measured using an integrated luminosity of 1.0 fb-1 of pp collision data colle…

hep-ex2012★ 9 cited

Precision measurements of branching fractions for $ψ^{'} \to π^{0} J ψ$ and $η J ψ$

M. Ablikim, M. N. Achasov, O. Albayrak +342

We present a precision study of the $\psip\toπ^0 J/ψ$ and $η J / ψ$ decay modes. The measurements are obtained using $106 \times 1 0^{6}$ $ψ^{'}$ events accumulated with the BESIII detector a…

hep-ex2012★ 42 cited

A model-independent Dalitz plot analysis of $B^{\pm} \to D K^{\pm}$ with $D \to K_{S}^{0} h^{+} h^{-}$ ( $h = π, K$ ) decays and constraints on the CKM angle $γ$

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

A binned Dalitz plot analysis of $B^{\pm} \to D K^{\pm}$ decays, with $D \to K_{S}^{0} π^{+} π^{-}$ and $D \to K_{S}^{0} K^{+} K^{-}$ , is performed to measure the CP-violating observables $…

hep-ex2012★ 39 cited

Measurement of the CP asymmetry in B0 -> K*0 mu+ mu- decays

LHCb collaboration, R. Aaij, C. Abellan Beteta +620

A measurement of the CP asymmetry in B0 -> K*0 mu+ mu- decays is presented, based on 1.0fb-1 of pp collision data recorded by the LHCb experiment during 2011. The measurement is pe…

hep-ex2012★ 76 cited

Measurement of the D+/- production asymmetry in 7 TeV pp collisions

LHCb collaboration, R. Aaij, C. Abellan Beteta +619

The asymmetry in the production cross-section σof D+/- mesons, A_P = (σ(D+) - σ(D-))/(σ(D+) + σ(D-)), is measured in bins of pseudorapidity ηand transverse momentum p_T within the…

hep-ex2012★ 46 cited

First observation of the decay $B^{+} \to π^{+} μ^{+} μ^{-}$

LHCb Collaboration, R. Aaij, C. Abellan Beteta +621

A discovery of the rare decay $B^{+} \to π^{+} μ^{+} μ^{-}$ is presented. This decay is observed for the first time, with 5.2 $σ$ significance. The observation is made usin…

hep-ex2012★ 17 cited

First evidence for the annihilation decay mode $B^{+} \to D_{s}^{+} ϕ$

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

Evidence for the hadronic annihilation decay mode $B^{+} \to D_{s}^{+} ϕ$ is found with greater than $3 σ$ significance. The branching fraction and \CP asymmetry are measured to be \ma…

hep-ex2012★ 48 cited

Determination of the number of $ψ^{'}$ event at BESIII

M. Ablikim, M. N. Achasov, D. J. Ambrose

The number of $\psp$ events accumulated by the BESIII experiment from March 3 through April 14, 2009, is determined by counting inclusive hadronic events. The result is $106.41\tim…

hep-ex2012★ 16 cited

Measurement of $χ_{c J}$ decaying into $p n ˉ π^{-}$ and $p n ˉ π^{-} π^{0}$

M. Ablikim, M. N. Achasov, O. Albayrak +345

Using a data sample of $1.06 \times 1 0^{8}$ $\psip$ events collected with the BESIII detector in 2009, the branching fractions of $χ_{c J} \to p n ˉ π^{-}$ and $χ_{cJ}\to p\bar{n}π…

hep-ex2012★ 105 cited

Differential branching fraction and angular analysis of the $B^{+} \to K^{+} μ^{+} μ^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

The angular distribution and differential branching fraction of the decay $B^{+} \to K^{+} μ^{+} μ^{-}$ are studied with a dataset corresponding to $1.0 fb^{- 1}$ of…

hep-ex2012★ 93 cited

Measurements of $B_{c}^{+}$ production and mass with the $B_{c}^{+} \to J / ψ π^{+}$ decay

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

Measurements of $B_{c}^{+}$ production and mass are performed with the decay mode $B_{c}^{+} \to J / ψ π^{+}$ using 0.37 fb $^{- 1}$ of data collected in $pp$ collisions at $s = 7$ TeV by th…

First observation of the decays Bˉ(s)0​→Ds+​K−π+π− and Bˉs0​→Ds1​(2536)+π−

Measurement of CP observables in B0 -> D K*0 with D -> K+ K-

Measurement of the forward energy flow in pp collisions at sqrt(s)=7 TeV

Measurement of J/psi production in pp collisions at sqrt(s)=2.76 TeV

Study of the near-threshold ωϕ mass enhancement in doubly OZI suppressed J/ψ→γωϕ decays

Improved Measurement of Electron Antineutrino Disappearance at Daya Bay

First evidence for the decay Bs -> mu+ mu-

Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays

First observation of the decay Bs2∗​(5840)0→B∗+K− and studies of excited Bs​ mesons

Measurements of psi'-> pbar K+ sigma0 and chi_cj->pbar K+ Lambda

Search for η and η′→π+e−νˉe​+c.c. decays in $\jpsi \to ϕη$ and ϕη′

Measurements of Baryon Pair Decays of χcJ​ Mesons

Observation of D0-D0bar oscillations

Measurement of the ratio of branching fractions BR(B0 -> K*0 gamma)/BR(Bs0 -> phi gamma) and the direct CP asymmetry in B0 -> K*0 gamma

Precision measurements of branching fractions for ψ′→π0Jψ and ηJψ

A model-independent Dalitz plot analysis of B±→DK± with D→KS0​h+h− (h=π,K) decays and constraints on the CKM angle γ

Measurement of the CP asymmetry in B0 -> K*0 mu+ mu- decays

Measurement of the D+/- production asymmetry in 7 TeV pp collisions

First observation of the decay B+→π+μ+μ−

First evidence for the annihilation decay mode B+→Ds+​ϕ

Determination of the number of ψ′ event at BESIII

Measurement of χcJ​ decaying into pnˉπ− and pnˉπ−π0

Differential branching fraction and angular analysis of the B+→K+μ+μ− decay

Measurements of Bc+​ production and mass with the Bc+​→J/ψπ+ decay

First observation of the decays $B ˉ_{(s)}^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ and $B ˉ_{s}^{0} \to D_{s 1} (2536)^{+} π^{-}$

Study of the near-threshold $ω ϕ$ mass enhancement in doubly OZI suppressed $J / ψ \to γ ω ϕ$ decays

First observation of the decay $B_{s 2}^{} (5840)^{0} \to B^{+} K^{-}$ and studies of excited $B_{s}$ mesons

Search for $η$ and $η^{'} \to π^{+} e^{-} ν ˉ_{e} + c . c .$ decays in $\jpsi \to ϕη$ and $ϕ η^{'}$

Measurements of Baryon Pair Decays of $χ_{c J}$ Mesons

Measurement of the ratio of branching fractions BR(B0 -> K0 gamma)/BR(Bs0 -> phi gamma) and the direct CP asymmetry in B0 -> K0 gamma

Precision measurements of branching fractions for $ψ^{'} \to π^{0} J ψ$ and $η J ψ$

A model-independent Dalitz plot analysis of $B^{\pm} \to D K^{\pm}$ with $D \to K_{S}^{0} h^{+} h^{-}$ ( $h = π, K$ ) decays and constraints on the CKM angle $γ$

First observation of the decay $B^{+} \to π^{+} μ^{+} μ^{-}$

First evidence for the annihilation decay mode $B^{+} \to D_{s}^{+} ϕ$

Determination of the number of $ψ^{'}$ event at BESIII

Measurement of $χ_{c J}$ decaying into $p n ˉ π^{-}$ and $p n ˉ π^{-} π^{0}$

Differential branching fraction and angular analysis of the $B^{+} \to K^{+} μ^{+} μ^{-}$ decay

Measurements of $B_{c}^{+}$ production and mass with the $B_{c}^{+} \to J / ψ π^{+}$ decay