Results 31 to 40 of about 407,179 (345)

To understand the rare decay Bs→π+π−ℓ+ℓ−

Physics Letters B, 2015
Motivated by the LHCb measurement, we analyze the Bs→π+π−ℓ+ℓ− decay in the kinematics region where the pion pairs have invariant masses in the range 0.5–1.3 GeV and muon pairs do not originate from a resonance.
Wei Wang, Rui-Lin Zhu
doaj   +1 more source

Axion-Like Particles at the ILC Giga-Z

Journal of High Energy Physics, 2021
Axion-Like Particles (ALPs) are a generic, calculable, and well motivated extension of the Standard Model with far reaching phenomenology. ALPs that couple only to hypercharge represent one subset of such models, coupling the ALP to both photons and the ...
Noah Steinberg, James D. Wells
doaj   +1 more source

Rare Radiative B -> tau^+ tau^- gamma Decay

, 1997
The radiative B -> tau^+ tau^- gamma decay is investigated in the framework of the Standard Model. When only short (short and long together) distance contributions are taken into account, the Branching Ratio is found as 9.54x10^(-9) (1.52x10^(-8)), for ...
Aliev, T. M., Pak, N. K., Savci, M.
core   +1 more source

Rare kaon decays revisited

Physics Letters B, 2004
We present an updated discussion of $K\ra \bar{l} l$ decays in a combined framework of chiral perturbation theory and Large--$N_c$ QCD, which assumes the dominance of a minimal narrow resonance structure in the invariant mass dependence of the $ \bar{l} l$ pair.
Friot, Samuel, Greynat, David, de Rafael, Eduardo   +2 more
openaire   +2 more sources

Precision measurements with kaon and pion decays at CERN [PDF]

EPJ Web of Conferences
The NA62 measurement of the branching ratio and the di-photon mass spectrum of the K+ → π+γγ decay is presented, together with a preliminary result on the branching fraction of the rare decay π0 → e+e−.
Bizzeti Andrea
doaj   +1 more source

NA48: Rare Decay Results [PDF]

, 2001
Recent results on the kaon rare decays measured in NA48 experiment at CERN are presented.Comment: 5 pages, 7 ...
Cuhadar-Donszelmann, Tulay
core   +1 more source

Rare B Decays and B Decay Dynamics

, 2005
I present some recent measurements of B meson decay rates to leptonic and charmless hadronic final states, as well as of CP-violation charge asymmetries and other features. I sketch the theoretical frameworks used to predict these, and indicate the level
Ford, William T.
core   +1 more source

Measurement of the rare decay pi0 -> e+ e- [PDF]

, 2006
The branching ratio of the rare decay pi0 -> e+ e- has been measured precisely, using the complete data set from the KTeV E799-II experiment at Fermilab. We observe 794 candidate pi0 -> e+ e- events using K0_L -> 3pi0 as a source of tagged pi0's.
A. Bellavance, A. Glazov, A. Golossanov, A. Ledovskoy, A. R. Barker, A. R. Erwin, B. Cox, B. Winstein, C. O. Escobar, C. Velissaris, D. A. Jensen, D. G. Phillips, D. Smith, E. Abouzaid, E. Blucher, E. C. Swallow, E. Cheu, E. D. Zimmerman, E. J. Ramberg, E. Monnier, E. Santos, E. T. Worcester, G. J. Bock, H. B. White, H. Huang, H. Nguyen, H. Ping, J. Shields, J. Wang, J. Whitmore, K. Hanagaki, K. Kotera, K. S. Nelson, L. Bellantoni, M. Arenton, M. D. Corcoran, M. J. Wilking, M. Ronquest, M. Worcester, N. Solomey, P. A. Toale, P. Gouffon, P. L. McBride, R. A. Gomes, R. Coleman, R. E. Ray, R. F. Zukanovich, R. Kessler, R. Niclasen, R. Tschirhart, R. Winston, S. Berman, S. Drell, T. Yamanaka, W. Slater, X. R. Qi, Y. B. Hsiung, Y. W. Wah   +57 more
core   +2 more sources

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Study of the rare decay K±→π±γγ

EPJ Web of Conferences, 2014
The NA62 and NA48/2 experiments at CERN collected a large sample of charged kaon decays with a low intensity beam and minimum bias trigger conditions in 2004 (NA48/2) and 2007 (NA62).
Cassese Antonio
doaj   +1 more source