H. Lu

First observation of a baryonic $B_{c}^{+}$ decay

LHCb collaboration, R. Aaij, B. Adeva +699

A baryonic decay of the $B_{c}^{+}$ meson, $B_{c}^{+} \to J / I ¨ p p I ¨ ^{+}$ , is observed for the first time, with a significance of $7.3$ standard deviations, in $pp$ collision data co…

First measurement of the charge asymmetry in beauty-quark pair production at a hadron collider

R. Aaij, B. Adeva, M. Adinolfi +700

The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in $b b ˉ$ pair production…

hep-th2025

Quadratic Curvature Correction to 5D Myers-Perry Metric

Liang Ma, H. Lu

We consider quadratic curvature perturbation to the Myers-Perry black hole in five dimensions at the linear level in the coupling constant. The solution can then be solved order by…

hep-th2010

Constructing Calabi-Yau Metrics From Hyperkahler Spaces

H. Lu, Yi Pang, Zhao-Long Wang

Recently, a metric construction for the Calabi-Yau 3-folds from a four-dimensional hyperkahler space by adding a complex line bundle was proposed. We extend the construction by add…

hep-th2008

Ricci-Flat and Charged Wormholes in Five Dimensions

H. Lu, Jianwei Mei

We construct stationary Ricci-flat inter-universe Lorentzian wormhole solutions in all D\ge 5 dimensions that connect two flat asymptotic spacetimes. Such a solution can be viewed…

hep-th2025

Odd-dimensional Extremal Rotating Black Holes with All Equal Angular Momenta and Small Electric Charges

Qi-Yuan Mao, H. Lu

We consider Einstein-Maxwell gravity in diverse dimensions and construct the small charge perturbation to the extremal rotating black holes with all equal angular momenta in odd $D…

Static and Dynamic Hairy Planar Black Holes

Zhong-Ying Fan, H. Lu

We consider Einstein gravity in general dimensions, coupled to a scalar field either minimally or non-minimally, together with a generic scalar potential. By making appropriate cho…

hep-th1995

Higher-spin Realisations of the Bosonic String

H. Lu, C. N. Pope, K. W. Xu

It has been shown that certain $W$ algebras can be linearised by the inclusion of a spin--1 current. This provides a way of obtaining new realisations of the $W$ algebras. Recently…

hep-th1996

Fission and Fusion Bound States of p-brane Solitons

H. Lu, C. N. Pope

Supersymmetric $p$ -branes that carry a single electric or magnetic charge and preserve $1/2$ of the supersymmetry have been interpreted as the constituents from which all supersymm…

gr-qc2022

Tightening the Penrose Inequality

H. Khodabakhshi, H. Lu, Run-Qiu Yang

The Penrose inequality estimates the lower bound of the mass of a black hole in terms of the area of its horizon. This bound is relatively loose for extremal or near extremal black…

Measurement of the B0bar-B0 and Bsbar-Bs production asymmetries in pp collisions at sqrt(s)=7 TeV

LHCb collaboration, R. Aaij, B. Adeva +700

The B0bar-B0 and Bsbar-Bs production asymmetries, AP(B0) and AP(Bs), are measured by means of a time-dependent analysis of B0 -> J/ÏK*0, B0 -> D- pi+ and Bs -> Ds- pi+ decays, usi…

Killing Spinors for the Bosonic String

H. Lu, Zhao-Long Wang

We obtain the effective action for the bosonic string with arbitrary Yang-Mills fields, up to the Î±' order, in general dimensions. The form of the action is determined by the requ…

hep-th2005

Horava-Witten Stability: eppur si muove

W. Chen, Z. -W. Chong, G. W. Gibbons +2

We construct exact time-dependent solutions of the supergravity equations of motion in which two initially non-singular branes, one with positive and the other with negative tensio…

hep-th2000

Consistent Warped-Space Kaluza-Klein Reductions, Half-Maximal Gauged Supergravities and CP^n Constructions

M. Cvetic, H. Lu, C. N. Pope

We obtain new consistent Kaluza-Klein embeddings of the gauged supergravities with half of maximal supersymmetry in dimensions D=7, 6, 5 and 4. They take the form of warped embeddi…

hep-th1995

Supermembranes with fewer supersymmetries

M. J. Duff, H. Lu, C. N. Pope +1

The usual supermembrane solution of $D = 11$ supergravity interpolates between $R^{11}$ and $A d S_{4} \times r o u n d S^{7}$ , has symmetry $P_{3} \times S O (8)$ and preserves $1/2$ of the space…

hep-th2021

A Correspondence between Ricci-flat Kerr and Kaluza-Klein AdS Black Hole

Liang Ma, H. Lu

We establish an explicit correspondence of Einstein gravity on the squashed spheres that are the $U (1)$ bundles over $CP^{m}$ to the Kaluza-Klein AdS gravity on the tori. Th…

Observation of excited Lambda_b0 baryons

LHCb collaboration, R. Aaij, C. Abellan Beteta +615

Using pp collision data corresponding to 1.0 fb-1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Lambda_b0pi+pi- spectrum with masses 5…

Measurement of the $B_{s}^{0} \to I^¼^{+} I^¼^{-}$ branching fraction and search for $B^{0} \to I^¼^{+} I^¼^{-}$ decays at the LHCb experiment

LHCb collaboration, R. Aaij, B. Adeva +650

A search for the rare decays $B_{s}^{0} \to I^¼^{+} I^¼^{-}$ and $B^{0} \to I^¼^{+} I^¼^{-}$ is performed at the LHCb experiment. The data analysed correspond to an integrated luminosity of 1 fb $^{- 1}$ …

Electrically-Charged Lifshitz Spacetimes, and Hyperscaling Violations

Zhong-Ying Fan, H. Lu

Electrically-charged Lifshitz spacetimes are hard to come by. In this paper, we construct a class of such solutions in five dimensional Einstein gravity coupled to Maxwell and $SU(…

Search for Majorana neutrinos in $B^{-} \to I ¨ ^{+} I^¼^{-} I^¼^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +674

A search for heavy Majorana neutrinos produced in the $B^{-} \to I ¨ ^{+} I^¼^{-} I^¼^{-}$ decay mode is performed using 3 fb $^{- 1}$ of integrated luminosity collected with the LHCb detector in…

First observation of the decay Bc+ to J/psi pi+pi-pi+

LHCb collaboration, R. Aaij, C. Abellan Beteta +592

The decay Bc+ --> J/psi pi+pi-pi+ is observed for the first time, using 0.8 fb-1 of pp collisions at sqrt{s}=7 TeV collected by the LHCb experiment. The ratio of branching fraction…

hep-th2014

An $I ¨ $ Deformation of Gauged STU Supergravity

H. Lu, Y. Pang, C. N. Pope

Four-dimensional $N = 2$ gauged STU supergravity is a consistent truncation of the standard $N = 8$ gauged $S O (8)$ supergravity in which just the four $U (1)$ gauge fields…

hep-th2009

Kac-Moody and Virasoro Symmetries of Principal Chiral Sigma Models

H. Lu, M. J. Perry, C. N. Pope +1

It is commonly asserted that there is a \hat G\times G centreless Kac-Moody extension of the manifest G\times G global symmetry of the two-dimensional principal chiral model (PCM)…

hep-th2005

Non-extremal Charged Rotating Black Holes in Seven-Dimensional Gauged Supergravity

Z. -W. Chong, M. Cvetic, H. Lu +1

We obtain the solution for non-extremal charged rotating black holes in seven-dimensional gauged supergravity, in the case where the three rotation parameters are set equal. There…

Measurements of the branching fractions of the decays $B_{s}^{0} \to D_{s}^{\mp} K^{\pm}$ and $B_{s}^{0} \to D_{s}^{-} I ¨ ^{+}$

The LHCb collaboration, R. Aaij, C. Abellan Beteta +592

The decay mode $\B^{0}_{s} \to D^{\mp}_{s} K^{\pm} $ allows for one of the theoretically cleanest measurements of the CKM angle $I^^{3}$ through the study of time-dependent $\ensuremat…

Observation of X(3872) production in pp collisions at sqrt(s)= 7 TeV

LHCb Collaboration, R. Aaij, C. Abellan Beteta +585

Using 34.7 pb-1 of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at sqrt(s) = 7 TeV is observed for the first time. Candidat…

hep-th1993

On the Spectrum and Scattering of W_3 Strings

H. Lu, C. N. Pope, S. Schrans +1

We present a detailed investigation of scattering processes in $W_{3}$ string theory. We discover further physical states with continuous momentum, which involve excitations of the g…

astro-ph2007

New estimation of the spectral index of high-energy cosmic rays as determined by the Compton-Getting anisotropy

M. Amenomori, X. J. Bi, D. Chen +82

The amplitude of the Compton-Getting (CG) anisotropy contains the power-law index of the cosmic-ray energy spectrum. Based on this relation and using the Tibet air-shower array dat…

nucl-ex2016

JLab Measurements of the 3He Form Factors at Large Momentum Transfers

A. Camsonne, A. T. Katramatou, M. Olson +66

The charge and magnetic form factors, FC and FM, of 3He have been extracted in the kinematic range 25 fm-2 < Q2 < 61 fm-2 from elastic electron scattering by detecting 3He recoil n…

Measurement of the $B ˉ_{s}^{0} \to D_{s}^{-} D_{s}^{+}$ and $B ˉ_{s}^{0} \to D^{-} D_{s}^{+}$ effective lifetimes

LHCb collaboration, R. Aaij, B. Adeva +672

The first measurement of the effective lifetime of the $B ˉ_{s}^{0}$ meson in the decay $B ˉ_{s}^{0} \to D_{s}^{-} D_{s}^{+}$ is reported using a proton-proton collision dataset, correspondi…

Search for the decay Bs -> D*-+ Ï+-

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

A search for the decay Bs -> D*-+ Ï+- is presented using a data sample corresponding to an integrated luminosity of 1.0 fb-1 of pp collisions collected by LHCb. This decay is expe…

hep-th1997

Supersymmetry without Supersymmetry

M. J. Duff, H. Lu, C. N. Pope

We present four-dimensional M-theory vacua with N>0 supersymmetry which, from the perspective of perturbative Type IIA string theory, have N=0. Such vacua can appear when the compa…

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

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

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

First observations of the rare decays $B^{+} - > K^{+} I ¨ ^{+} I ¨ ^{-} I^¼^{+} I^¼^{-}$ and $B^{+} - > I ¨ K^{+} I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, B. Adeva +697

First observations of the rare decays $B^{+} \to K^{+} I ¨ ^{+} I ¨ ^{-} I^¼^{+} I^¼^{-}$ and $B^{+} \to I ¨ K^{+} I^¼^{+} I^¼^{-}$ are presented using data corresponding to an integrated luminosity of…

Higher-Order Corrections to Non-Compact Calabi-Yau Manifolds in String Theory

H. Lu, C. N. Pope, K. S. Stelle

At the leading order, the low-energy effective field equations in string theory admit solutions of the form of products of Minkowski spacetime and a Ricci-flat Calabi-Yau space. Th…

Measurement of resonant and $C P$ components in $B_{s}^{0} \to J / I ¨ I ¨ ^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +680

The resonant structure of the decay $B_{s}^{0} \to J / I ¨ I ¨ ^{+} I ¨ ^{-}$ is studied using data corresponding to 3 fb $^{- 1}$ of integrated luminosity from $pp$ collisions by the LHC a…

Pseudo-Supergravity Extension of the Bosonic String

H. Lu, C. N. Pope, Zhao-Long Wang

We construct a ``pseudo-supersymmetric" fermionic extension of the effective action of the bosonic string in arbitrary spacetime dimension D. The theory is invariant under pseudo-s…

Observation of the $B_{s}^{0} \to J / I ¨ K_{S}^{0} K^{\pm} I ¨ ^{\mp}$ decay

LHCb collaboration, R. Aaij, B. Adeva +696

Decays of the form $B_{(s)}^{0} \to J / I ¨ K_{S}^{0} h^{+} h^{(') -}$ ( $h^{(')} = K, I ¨ $ ) are searched for in proton-proton collision data corresponding…

hep-ex2015

Quantum numbers of the $X (3872)$ state and orbital angular momentum in its $I ¨ ^{0} J I ¨ $ decay

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

Angular correlations in $B^{+} \to X (3872) K^{+}$ decays, with $X (3872) \to I ¨ ^{0} J / I ¨ $ , $I ¨ ^{0} \to I ¨ ^{+} I ¨ ^{-}$ and $J / I ¨ \to I^¼^{+} I^¼^{-}$ , are used to measure orbital angular momentum contribution…

hep-th2000

Localised Gravity in the Singular Domain Wall Background?

M. Cvetic, H. Lu, C. N. Pope

We study singular, supersymmetric domain-wall solutions supported by the massive breathing mode scalars of, for example, sphere reductions in M-theory or string theory. The space-t…

Search for the lepton-flavour violating decays $B_{s}^{0} \to e^{\pm} I^¼^{\mp}$ and $B^{0} \to e^{\pm} I^¼^{\mp}$

LHCb collaboration, R. Aaij, B. Adeva +650

A search for the lepton-flavour violating decays $B_{s}^{0} \to e^{\pm} I^¼^{\mp}$ and $B^{0} \to e^{\pm} I^¼^{\mp}$ is performed with a data sample, corresponding to an integrated luminos…

astro-ph.HE2014

Energy Spectrum of Cosmic Protons and Helium Nuclei by a Hybrid Measurement at 4300 m a.s.l

B. Bartoli, P. Bernardini, X. J. Bi +97

The energy spectrum of cosmic Hydrogen and Helium nuclei has been measured, below the so-called "knee", by using a hybrid experiment with a wide field-of-view Cherenkov telescope a…

hep-th2012

Supersymmetry of the Schrodinger and PP Wave Solutions in Einstein-Weyl Supergravities

Hai-Shan Liu, H. Lu

We obtain the Schrodinger and general pp-wave solutions with or without the massive vector in Einstein-Weyl supergravity. The vector is an auxiliary field in the off-shell supermul…

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…

Measurement of the CP-violating phase $I ¨ _{s}$ in $B_{s}^{0} \to J / I ¨ I ¨ ^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +697

The mixing-induced CP-violating phase $I ¨ _{s}$ in $B_{s}^{0}$ and $B_{s}^{0}$ decays is measured using the $J / I ¨ I ¨ ^{+} I ¨ ^{-}$ final state in data, taken from 3\,fb $^{- 1}$ of integra…

cond-mat.mes-hall2012

Landau-Zener-Stuckelberg Interferometry of a Single Electron Charge Qubit

J. Stehlik, Y. Dovzhenko, J. R. Petta +4

We perform Landau-Zener-Stuckelberg interferometry on a single electron GaAs charge qubit by repeatedly driving the system through an avoided crossing. We observe coherent destruct…

Search for CP violation in D+ -> phi pi+ and Ds+ -> Ks pi+ decays

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

A search for CP violation in D+ -> phi pi+ decays is performed using data collected in 2011 by the LHCb experiment corresponding to an integrated luminosity of 1.0 fb^{-1} at a cen…

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

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

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

hep-th1995

BRST Operators for Higher-spin Algebras

H. Lu, C. N. Pope, K. W. Xu

In this paper, we construct non-critical BRST operators for matter and Liouville systems whose currents generate two different $W$ algebras. At the classical level, we construct th…

cond-mat.str-el2021

Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange

F. Xiao, W. J. A. Blackmore, B. M. Huddart +13

We present an investigation of the effect of randomizing exchange strengths in the $S = 1/2$ square lattice quasi-two-dimensional quantum Heisenberg antiferromagnet (QuinH) $_{2}$ Cu(Cl$…

hep-th2013

SL(n,R)-Toda Black Holes

H. Lu, Wei Yang

We consider D-dimensional Einstein gravity coupled to (n-1) U(1) vector fields and (n-2) dilatonic scalars. We find that for some appropriate exponential dilaton couplings of the f…

hep-th2016

Godel Universe from String Theory

Shou-Long Li, Xing-Hui Feng, Hao Wei +1

GÃ¶del universe is a direct product of a line and a three-dimensional spacetime we call G $_{I^} \pm$ . In this paper, we show that the GÃ¶del metrics can arise as exact solutions in Einst…

Search for the rare decay $D^{0} \to I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, C. Abellan Beteta +634

A search for the rare decay $D^{0} \to I^¼^{+} I^¼^{-}$ is performed using a data sample, corresponding to an integrated luminosity of 0.9 fb $^{- 1}$ , of $pp$ collisions collected at a centr…

hep-th1997

Multiplet Structures of BPS Solitons

H. Lu, C. N. Pope, K. S. Stelle

There exist simple single-charge and multi-charge BPS p-brane solutions in the D-dimensional maximal supergravities. From these, one can fill out orbits in the charge vector space…

A study of CP violation in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D I ¨ ^{\pm}$ decays with $D \to K_{S}^{0} K^{\pm} I ¨ ^{\mp}$ final states

LHCb collaboration, R. Aaij, B. Adeva +682

A first study of CP violation in the decay modes $B^{\pm} \to [K_{S}^{0} K^{\pm} I ¨ ^{\mp}]_{D} h^{\pm}$ and $B^{\pm} \to [K_{S}^{0} K^{\mp} I ¨ ^{\pm}]_{D} h^{\pm}$ , where $h$ labels a $K$ or $I ¨ $ mes…

Observation of Bs -> J/Ïf'2(1525) in J/ÏK+K- final states

LHCb Collaboration, R. Aaij, C. Abellan Beteta +583

The decay Bs -> J/ÏK+ K- is investigated using 0.16/fb of data collected with the LHCb detector using 7 TeV pp collisions. Although the J/ÏÏ channel is well known, final states…

Supergravities with Minkowski x Sphere Vacua

J. Kerimo, James. T. Liu, H. Lu +1

Recently the authors have introduced a new gauged supergravity theory with a positive definite potential in D=6, obtained through a generalised Kaluza-Klein reduction from D=7. Of…

hep-th1996

From p-branes to Cosmology

H. Lu, S. Mukherji, C. N. Pope

We study the relationship between static p-brane solitons and cosmological solutions of string theory or M-theory. We discuss two different ways in which extremal p-branes can be g…

gr-qc2025

Black Hole Entropy Bounded by the Specific Heat

Kai-Peng Lu, H. Lu

We propose new bounds on black hole entropy in terms of the specific heat at fixed charges. For special spherically-symmetric and static black holes ( $g_{tt} g_{r r} = - 1$ ), we prove…

astro-ph.HE2021

First Detection of sub-PeV Diffuse Gamma Rays from the Galactic Disk: Evidence for Ubiquitous Galactic Cosmic Rays beyond PeV Energies

M. Amenomori, Y. W. Bao, X. J. Bi +92

We report, for the first time, the long-awaited detection of diffuse gamma rays with energies between 100 TeV and 1 PeV in the Galactic disk. Particularly, all gamma rays above 398…

Measurement of the effective $B_{s}^{0} \to K^{+} K^{-}$ lifetime

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

A precise determination of the effective $B_{s}^{0} \to K^{+} K^{-}$ lifetime can be used to constrain contributions from physics beyond the Standard Model in the $B_{s}^{0}$ meson sys…

hep-th2010

Thermodynamical Metrics and Black Hole Phase Transitions

Haishan Liu, H. Lu, Mingxing Luo +1

An important phase transition in black hole thermodynamics is associated with the divergence of the specific heat with fixed charge and angular momenta, yet one can demonstrate tha…

hep-th1993

On Higher-spin Generalisations of String Theory

H. Lu, C. N. Pope, X. J. Wang

We construct BRST operators for certain higher-spin extensions of the Virasoro algebra, in which there is a spin- $s$ gauge field on the world sheet, as well as the spin-2 gauge fie…

First evidence for the two-body charmless baryonic decay $B^{0} \to p p ˉ$

LHCb collaboration, R. Aaij, B. Adeva +657

The results of a search for the rare two-body charmless baryonic decays $B^{0} \to p p ˉ$ and $B_{s}^{0} \to p p ˉ$ are reported. The analysis uses a data sample, corresponding t…

hep-ex2022

Measurement of structure dependent radiative $K^{+} \to e^{+} I^½ I^^{3}$ decays using stopped positive kaons

H. Ito, A. Kobayashi, S. Bianchin +24

The structure dependent radiative $K^{+} \to e^{+} I^½ I^^{3}$ ( $K_{e 2 I^^{3}}^{S D^{+}}$ ) decay was investigated with stopped positive kaons. The $e^{+}$ momentum spectra containing 574$\…

A Note on Einstein Sasaki Metrics in D \ge 7

W. Chen, H. Lu, C. N. Pope +1

In this paper, we obtain new non-singular Einstein-Sasaki spaces in dimensions D\ge 7. The local construction involves taking a circle bundle over a (D-1)-dimensional Einstein-Kahl…

hep-th2012

AdS and Lifshitz Black Holes in Conformal and Einstein-Weyl Gravities

H. Lu, Y. Pang, C. N. Pope +1

We study black hole solutions in extended gravities with higher-order curvature terms, including conformal and Einstein-Weyl gravities. In addition to the usual AdS vacuum, the the…

Thermodynamics of AdS Black Holes in Einstein-Scalar Gravity

H. Lu, C. N. Pope, Qiang Wen

We study the thermodynamics of $n$ -dimensional static asymptotically AdS black holes in Einstein gravity coupled to a scalar field with a potential admitting a stationary point wit…

Charged Kerr-de Sitter Black Holes in Five Dimensions

M. Cvetic, H. Lu, C. N. Pope

We construct a general class of non-extremal charged Kerr-de Sitter black holes in five dimensions, in which the two rotation parameters are set equal. There are three non-trivial…

Differential branching fraction and angular analysis of the $B^{+} \to K^{+} I^¼^{+} I^¼^{-}$ decay

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

The angular distribution and differential branching fraction of the decay $B^{+} \to K^{+} I^¼^{+} I^¼^{-}$ are studied with a dataset corresponding to $1.0 fb^{- 1}$ …

cond-mat.mes-hall2011

Quantum Coherence in a One-Electron Semiconductor Charge Qubit

K. D. Petersson, J. R. Petta, H. Lu +1

We study quantum coherence in a semiconductor charge qubit formed from a GaAs double quantum dot containing a single electron. Voltage pulses are applied to depletion gates to driv…

hep-th1996

Heterotic phase transitions and singularities of the gauge dyonic string

M. J. Duff, H. Lu, C. N. Pope

Heterotic strings on $R^{6} \times K 3$ generically appear to undergo some interesting new phase transition at that value of the string coupling for which the one of the six-dimension…

gr-qc2020

Vacua and Exact Solutions in Lower- $D$ Limits of EGB

Liang Ma, H. Lu

We consider the action principles that are the lower dimensional limits of the Einstein-Gauss-Bonnet gravity {\it via} the Kaluza-Klein route. We study the vacua and obtain some ex…

Measurement of the $I ¨ _{b} (3 P)$ mass and of the relative rate of $I ¨ _{b 1} (1 P)$ and $I ¨ _{b 2} (1 P)$ production

LHCb collaboration, R. Aaij, B. Adeva +696

The production of $I ¨ _{b}$ mesons in proton-proton collisions is studied using a data sample collected by the LHCb detector, at centre-of-mass energies of $s = 7$ and $8$ TeV an…

astro-ph.HE2010

On Temporal Variations of the Multi-TeV Cosmic Ray Anisotropy using the Tibet III Air Shower Array

M. Amenomori, X. J. Bi, D. Chen +82

We analyze the large-scale two-dimensional sidereal anisotropy of multi-TeV cosmic rays by Tibet Air Shower Array, with the data taken from 1999 November to 2008 December. To explo…

hep-th2013

Charged Dilatonic AdS Black Holes and Magnetic AdS_{D-2} x R^2 Vacua

H. Lu

We consider D-dimensional Einstein gravity coupled to two U(1) fields and a dilaton with a scalar potential. We derive the condition that the analytical AdS black holes with two in…

astro-ph.HE2012

Long-term Monitoring on Mrk 501 for Its VHE gamma Emission and a Flare in October 2011

YBJ Collaboration, B. Bartoli, P. Bernardini +101

As one of the brightest active blazars in both X-ray and very high energy $I^^{3}$ -ray bands, Mrk 501 is very useful for physics associated with jets from AGNs. The ARGO-YBJ experiment…

hep-th2001

Ricci-flat Metrics, Harmonic Forms and Brane Resolutions

M. Cvetic, G. W. Gibbons, H. Lu +1

We discuss the geometry and topology of the complete, non-compact, Ricci-flat Stenzel metric, on the tangent bundle of S^{n+1}. We obtain explicit results for all the metrics, and…

First observation of the decay $B_{c}^{+} \to J / I ¨ K^{+}$

LHCb collaboration, R. Aaij, C. Abellan Beteta +632

The decay $B_{c}^{+} \to J / I ¨ K^{+}$ is observed for the first time using a data sample, corresponding to an integrated luminosity of 1.0 $f b^{- 1}$ , collected by the LHCb experiment in…

cond-mat.mes-hall2013

Frequency Multiplexing for Readout of Spin Qubits

J. M. Hornibrook, J. I. Colless, A. C. Mahoney +5

We demonstrate a low loss, chip-level frequency multiplexing scheme for readout of scaled-up spin qubit devices. By integrating separate bias tees and resonator circuits on-chip fo…

gr-qc2025

The Upper Bound of Event Horizon Formation Time in Generalized Oppenheimer-Snyder Collapse

Zhi-Chao Li, H. Khodabakhshi, H. Lu

We prove that, in the framework of the Oppenheimer-Snyder collapse, the Schwarzschild exterior maximizes the event horizon formation time $I^ T_{eh} = \frac{19}{6} m$ among all…

Linearized Modes in Extended and Critical Gravities

Yi-Xin Chen, H. Lu, Kai-Nan Shao

We construct explicit solutions for the linearized massive and massless spin-2, vector and scalar modes around the AdS spacetimes in diverse dimensions. These modes may arise in ex…

Measurement of D0-D0bar mixing parameters and search for CP violation using D0->K+pi- decays

LHCb collaboration, R. Aaij, B. Adeva +657

Measurements of charm mixing parameters from the decay-time-dependent ratio of D0->K+pi- to D0->K-pi+ rates and the charge-conjugate ratio are reported. The analysis uses data, cor…

hep-th2022

General Solutions of Einstein Gravity at $D \to 2$

Qi-Yuan Mao, H. Lu

Einstein gravity at $D \to 2$ limit can be obtained from the Kaluza-Klein procedure by taking the dimensions of the internal space to zero while keeping only the breathing m…

De Sitter Bounces

H. Lu, J. F. Vazquez-Poritz, John E. Wang

By analytically continuing recently-found instantons, we construct time-dependent solutions of Einstein-Maxwell de Sitter gravity which smoothly bounce between two de Sitter phases…

astro-ph.SR2013

Probe of the Solar Magnetic Field Using the "Cosmic-Ray Shadow" of the Sun

M. Amenomori, X. J. Bi, D. Chen +77

We report on a clear solar-cycle variation of the Sun's shadow in the 10 TeV cosmic-ray flux observed by the Tibet air shower array during a full solar cycle from 1996 to 2009. In…

Study of beauty hadron decays into pairs of charm hadrons

LHCb collaboration, R. Aaij, A. Abba +694

First observations of the decays $I^_{b}^{0} \to I^_{c}^{+} D_{(s)}^{-}$ are reported using data corresponding to an integrated luminosity of $3 fb^{- 1}$ collected at 7 and 8 TeV cent…

Solutions of Free Higher Spins in AdS

H. Lu, Kai-Nan Shao

We consider free massive and massless higher integer spins in AdS backgrounds in general D dimensions. We obtain the solutions corresponding to the highest-weight state of the spin…

hep-th2002

Resolution of Overlapping Branes

H. Lu, J. F. Vazquez-Poritz

We obtain singularity resolutions for various overlapping brane configurations, including those of two heterotic 5-branes, type II 5-branes or D4-branes. In these solutions, the ``…

Measurement of the fraction of \Y1S originating from \chib1P decays in $pp$ collisions at $\sqrt{s} = 7\tev$

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

The production of \chib1P mesons in $pp$ collisions at a centre-of-mass energy of $7\tev$ is studied using $32\invpb$ of data collected with the \lhcb detector. The $\chib1P$ meson…

Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi

LHCb Collaboration, R. Aaij, C. Abellan Beteta +585

We present a measurement of the time-dependent CP-violating asymmetry in B_s -> J/psi phi decays, using data collected with the LHCb detector at the LHC. The decay time distributio…

Differential branching fraction and angular analysis of the decay $B_{s}^{0} \to I ¨ I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, C. Abellan Beteta +636

The determination of the differential branching fraction and the first angular analysis of the decay $B_{s}^{0} \to I ¨ I^¼^{+} I^¼^{-}$ are presented using data, corresponding to an integrat…

hep-th2007

Kerr-Schild Structure and Harmonic 2-forms on (A)dS-Kerr-NUT Metrics

W. Chen, H. Lu

We demonstrate that the general (A)dS-Kerr-NUT solutions in D dimensions with ([D/2], [(D+1)/2]) signature admit [D/2] linearly-independent, mutually-orthogonal and affinely-parame…

Black Holes in Higher-Derivative Gravity

H. Lu, A. Perkins, C. N. Pope +1

Extensions of Einstein gravity with higher-order derivative terms arise in string theory and other effective theories, as well as being of interest in their own right. In this pape…

Search for the rare decays Bs -> mu+ mu- and B0 -> mu+ mu-

LHCb Collaboration, R. Aaij, C. Abellan Beteta +590

A search for the decays Bs -> mu+ mu- and B0 -> mu+ mu- is performed with 0.37 fb^-1 of pp collisions at sqrt{s} = 7 TeV collected by the LHCb experiment in 2011. The upper limits…

hep-th1999

Domain-wall Supergravities from Sphere Reduction

M. Cvetic, James T. Liu, H. Lu +1

Kaluza-Klein sphere reductions of supergravities that admit AdS x Sphere vacuum solutions are believed to be consistent. The examples include the S^4 and S^7 reductions of eleven-d…