We report on a search for the standard model Higgs boson produced in association with a W or Z boson in pp collisions at square root(s)=1.96 TeV recorded by the CDF II experiment at the Tevatron in a data sample corresponding to an integrated luminosity of 2.1 fb(-1). We consider events which have no identified charged leptons, an imbalance in transverse momentum, and two or three jets where at least one jet is consistent with originating from the decay of a b hadron. We find good agreement between data and background predictions. We place 95% confidence level upper limits on the production cross section for several Higgs boson masses ranging from 110 GeV/c(2) to 150 GeV/c(2). For a mass of 115 GeV/c(2) the observed (expected) limit is 6.9 (5.6) times the standard model prediction.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1103/PhysRevLett.104.141801 | DOI Listing |
Nat Commun
January 2025
Department of Physics and Astronomy, Seoul National University, Seoul, Korea.
Understanding how symmetry-breaking processes generate order out of disorder is among the most fundamental problems of nature. The scalar Higgs mode - a massive (quasi-) particle - is a key ingredient in these processes and emerges with the spontaneous breaking of a continuous symmetry. Its related exotic and elusive axial counterpart, a Boson with vector character, can be stabilized through the simultaneous breaking of multiple continuous symmetries.
View Article and Find Full Text PDFFront Surg
December 2024
Spine Center of Eastern Switzerland, Cantonal Hospital of St. Gallen & Medical School of St. Gallen, St. Gallen, Switzerland.
Background: Anterior column realignment (ACR), using a lateral lumbar or thoracic interbody fusion (LLIF) approach to release the anterior longitudinal ligament (ALL), is a powerful technique to increase segmental lordosis. We here report our experience with the use of expandible LLIF cages for ACR.
Methods: Retrospective, single-center observational cohort study including consecutive patients treated by LLIF using an expandible interbody implant.
Phys Rev Lett
December 2024
High Energy Theory Group, Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
We present results from a complete next-to-leading order (NLO) calculation of e^{+}e^{-}→ZH in the standard model effective field theory (SMEFT) framework, including all contributions from dimension-six operators. At NLO, there are novel dependencies on CP violating parameters in the gauge sector, on modifications to the Higgs boson self-couplings, on alterations to the top quark Yukawa couplings, and on four-fermion operators involving the electron and the top quark, among others. We show that including only the logarithms resulting from renormalization group scaling can produce misleading results, and further, we explicitly demonstrate the constraining power of combining measurements from different energy scales.
View Article and Find Full Text PDFPain Ther
November 2024
SPR Therapeutics, Cleveland, OH, USA.
Eur Phys J C Part Fields
November 2024
Department of Physics, University of Wisconsin, Madison, WI 53706 USA.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!