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Study of the quasi-free $np \to np \pi^+\pi^-$ reaction with a deuterium beam at 1.25 GeV/nucleon

The tagged quasi-free $np \to np\pi^+\pi^-$ reaction has been studied experimentally with the High Acceptance Di-Electron Spectrometer (HADES) at GSI at a deuteron incident beam energy of 1.25 GeV/nucleon ($\sqrt s \sim$ 2.42 GeV/c for the…

Nuclear Experiment · Physics 2015-09-25 G. Agakishiev , A. Balanda , D. Belver , A. V. Belyaev , A. Blanco , M. Böhmer , J. L. Boyard , P. Braun-Munzinger , P. Cabanelas , E. Castro , S. Chernenko , T. Christ , M. Destefanis , J. Díaz , F. Dohrmann , A. Dybczak , L. Fabbietti , O. V. Fateev , P. Finocchiaro , P. Fonte , J. Friese , I. Fröhlich , T. Galatyuk , J. A. Garzón , R. Gernhäuser , A. Gil , C. Gilardi , K. Göbel , M. Golubeva , D. González-Díaz , F. Guber , M. Gumberidze , T. Hennino , R. Holzmann , A. Ierusalimov , I. Iori , A. Ivashkin , M. Jurkovic , B. Kämpfer , T. Karavicheva , D. Kirschner , I. Koenig , W. Koenig , B. W. Kolb , R. Kotte , F. Krizek , R. Krücken , W. Kühn , A. Kugler , A. Kurepin , A. Kurilkin , P. Kurilkin , V. Ladygin , S. Lang , J. S. Lange , K. Lapidus , T. Liu , L. Lopes , M. Lorenz , L. Maier , A. Mangiarotti , J. Markert , V. Metag , B. Michalska , J. Michel , E. Morinière , J. Mousa , C. Müntz , L. Naumann , J. Otwinowski , Y. C. Pachmayer , M. Palka , Y. Parpottas , V. Pechenov , O. Pechenova , J. Pietraszko , W. Przygoda , B. Ramstein , A. Reshetin , A. Rustamov , A. Sadovsky , P. Salabura , A. Schmah , E. Schwab , Yu. G. Sobolev , S. Spataro , B. Spruck , H. Ströbele , J. Stroth , C. Sturm , A. Tarantola , K. Teilab , P. Tlusty , M. Traxler , R. Trebacz , H. Tsertos , V. Wagner , T. Vasiliev , M. Weber , M. Wisniowski , T. Wojcik , J. Wüstenfeld , S. Yurevich , Y. Zanevsky , P. Zhou

FUSE Observations of U Geminorum During Outburst and Decline

We have obtained FUV (904 -- 1187 \AA) spectra of U Gem in outburst with FUSE. Three of the observations were acquired during the plateau phase of the outburst, while the fourth was obtained during late outburst decline. The plateau spectra…

Astrophysics · Physics 2009-11-06 C. S. Froning , K. S. Long , J. E. Drew , C. Knigge , D. Proga

Deformation dependence of the isovector giant dipole resonance: The neodymium isotopic chain revisited

Proton inelastic scattering experiments at energy E_p = 200 MeV and a spectrometer scattering angle of 0 degree were performed on 144,146,148,150Nd and 152Sm exciting the IsoVector Giant Dipole Resonance (IVGDR). Comparison with results…

Nuclear Experiment · Physics 2017-11-06 L. M. Donaldson , C. A. Bertulani , J. Carter , V. O. Nesterenko , P. von Neumann-Cosel , R. Neveling , P. -G. Reinhard , I. T. Usman , P. Adsley , J. W. Brummer , E. Z. Buthelezi , G. R. J. Cooper , R. W. Fearick , S. V. Förtsch , H. Fujita , Y. Fujita , M. Jingo , W. Kleinig , C. O. Kureba , J. Kvasil , M. Latif , K. C. W. Li , J. P. Mira , F. Nemulodi , P. Papka , L. Pellegri , N. Pietralla , V. Yu. Ponomarev , A. Richter , E. Sideras-Haddad , F. D. Smit , G. F. Steyn , J. A. Swartz , A. Tamii

The Deuterium Abundance at z=0.701 towards QSO 1718+4807

We present constraints on the deuterium to hydrogen ratio (D/H) in the metal-poor gas cloud at redshift $z=0.701$ towards QSO 1718+4807. We use new Keck spectra in addition to Hubble Space Telescope (HST) and International Ultraviolet…

Astrophysics · Physics 2009-10-31 David Tytler , Scott Burles , Limin Lu , Xiao-Ming Fan , Arthur Wolfe , Blair D. Savage

Measurements of the deuterium abundance in quasar absorption systems

Observational constraints on the primordial deuterium-to-hydrogen ratio (D/H) can test theories of the early universe and provide constraints on models of big bang nucleosynthesis (BBN). We measure deuterium absorption in high-redshift,…

Astrophysics · Physics 2007-05-23 Scott Burles , David Tytler

Observation of a threshold enhancement in the $\pi^+\pi^-$ spectrum in $\psi(3686) \rightarrow \pi^{+}\pi^{-}J/\psi$ decays

Based on the $(2712.4\pm14.4)\times 10^{6}$ $\psi(3686)$ events collected with the BESIII detector, we present a high-precision study of the $\pi^+\pi^-$ mass spectrum in $\psi(3686)\rightarrow\pi^{+}\pi^{-}J/\psi$ decays. A clear resonance…

High Energy Physics - Experiment · Physics 2026-04-17 BESIII Collaboration , M. Ablikim , M. N. Achasov , P. Adlarson , X. C. Ai , R. Aliberti , A. Amoroso , Q. An , Y. Bai , O. Bakina , Y. Ban , H. -R. Bao , V. Batozskaya , K. Begzsuren , N. Berger , M. Berlowski , M. B. Bertani , D. Bettoni , F. Bianchi , E. Bianco , A. Bortone , I. Boyko , R. A. Briere , A. Brueggemann , H. Cai , M. H. Cai , X. Cai , A. Calcaterra , G. F. Cao , N. Cao , S. A. Cetin , X. Y. Chai , J. F. Chang , T. T. Chang , G. R. Che , Y. Z. Che , C. H. Chen , Chao Chen , G. Chen , H. S. Chen , H. Y. Chen , M. L. Chen , S. J. Chen , S. M. Chen , T. Chen , X. R. Chen , X. T. Chen , X. Y. Chen , Y. B. Chen , Y. Q. Chen , Z. K. Chen , J. C. Cheng , L. N. Cheng , S. K. Choi , X. Chu , G. Cibinetto , F. Cossio , J. Cottee-Meldrum , H. L. Dai , J. P. Dai , X. C. Dai , A. Dbeyssi , R. E. de Boer , D. Dedovich , C. Q. Deng , Z. Y. Deng , A. Denig , I. Denisenko , M. Destefanis , F. De Mori , X. X. Ding , Y. Ding , Y. X. Ding , J. Dong , L. Y. Dong , M. Y. Dong , X. Dong , M. C. Du , S. X. Du , S. X. Du , X. L. Du , Y. Y. Duan , Z. H. Duan , P. Egorov , G. F. Fan , J. J. Fan , Y. H. Fan , J. Fang , J. Fang , S. S. Fang , W. X. Fang , Y. Q. Fang , L. Fava , F. Feldbauer , G. Felici , C. Q. Feng , J. H. Feng , L. Feng , Q. X. Feng , Y. T. Feng , M. Fritsch , C. D. Fu , J. L. Fu , Y. W. Fu , H. Gao , Y. Gao , Y. N. Gao , Y. N. Gao , Y. Y. Gao , Z. Gao , S. Garbolino , I. Garzia , L. Ge , P. T. Ge , Z. W. Ge , C. Geng , E. M. Gersabeck , A. Gilman , K. Goetzen , J. D. Gong , L. Gong , W. X. Gong , W. Gradl , S. Gramigna , M. Greco , M. H. Gu , C. Y. Guan , A. Q. Guo , J. N. Guo , L. B. Guo , M. J. Guo , R. P. Guo , X. Guo , Y. P. Guo , A. Guskov , J. Gutierrez , T. T. Han , F. Hanisch , K. D. Hao , X. Q. Hao , F. A. Harris , C. Z. He , K. L. He , F. H. Heinsius , C. H. Heinz , Y. K. Heng , C. Herold , P. C. Hong , G. Y. Hou , X. T. Hou , Y. R. Hou , Z. L. Hou , H. M. Hu , J. F. Hu , Q. P. Hu , S. L. 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On the deuterium abundance at z_a = 3.514 towards APM 08279+5255

A very low primordial deuterium abundance of D/H = 1.5 10^{-5} has recently been proposed by Molaro et al. in the Lyman limit system with log(N_HI) = 18.1 cm^{-2} at z_a = 3.514 towards the quasar APM08279+5255. The D/H value was estimated…

Astrophysics · Physics 2007-05-23 S. A. Levshakov , I. I. Agafonova , W. H. Kegel

Adsorption-induced symmetry reduction of metal-phthalocyanines studied by vibrational spectroscopy

We investigate the vibrational properties of Pt- and Pd-phthalocyanine (PtPc and PdPc) molecules on Ag(111) with high resolution electron energy loss spectroscopy (HREELS). In the monolayer regime, both molecules exhibit long range order.…

Materials Science · Physics 2017-10-11 J. Sforzini , F. C. Bocquet , F. S. Tautz

Millimeter and submillimeter spectroscopy of the deuterated molecular ion SD+

Seven rotational and fine-structure transitions of the deuterated molecular ion SD+ in the X 3S- ground electronic state have been measured in the 271-863 GHz region in the laboratory. This ion has been produced by DC-glow discharge using a…

Astrophysics of Galaxies · Physics 2024-03-25 Mitsunori Araki , Valerio Lattanzi , Christian P. Endres , Paula Caselli

Fourier transform spectroscopy and coupled-channel deperturbation treatment of the A1Sigma+ ~ b3Pi complex of KCs molecule

The laser induced fluorescence (LIF) spectra A1Sigma ~ b3Pi --> X1Sigma+ of KCs dimer were recorded in near infrared region by Fourier Transform Spectrometer with a resolution of 0.03 cm-1. Overall more than 200 LIF spectra were…

Atomic Physics · Physics 2015-05-14 A. Kruzins , I. Klincare , O. Nikolayeva , M. Tamanis , R. Ferber , E. A. Pazyuk , A. V. Stolyarov

Discovery of the Transition of a Mini-Broad Absorption Line into Broad Absorption in the SDSS Quasar J115122.14+020426.3

We present the detection of a rare case of dramatic strengthening in the UV absorption profiles in the spectrum of the quasar J115122.14+020426.3 between observations ~2.86 years apart in the quasar rest-frame. A 2001 spectrum from the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Paola Rodríguez Hidalgo , Michael Eracleous , Jane Charlton , Fred Hamann , Michael Murphy , Daniel Nestor

Precision measures of the primordial abundance of deuterium

We report the discovery of deuterium absorption in the very metal-poor ([Fe/H] = -2.88) damped Lyman-alpha system at z_abs = 3.06726 toward the QSO SDSS J1358+6522. On the basis of 13 resolved D I absorption lines and the damping wings of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Ryan Cooke , Max Pettini , Regina A. Jorgenson , Michael T. Murphy , Charles C. Steidel

Double resonant absorption measurement of acetylene symmetric vibrational states probed with cavity ring down spectroscopy

A novel mid-infrared/near-infrared double resonant absorption setup for studying infrared-inactive vibrational states is presented. A strong vibrational transition in the mid-infrared region is excited using an idler beam from a singly…

Chemical Physics · Physics 2016-07-21 J. Karhu , J. Nauta , M. Vainio , M. Metsälä , S. Hoekstra , L. Halonen

A New Measurement of the Primordial Abundance of Deuterium: Toward Convergence with the Baryon Density from the CMB?

From the analysis of the near-UV spectrum of the QSO 2206-199, obtained with a long series of exposures with STIS on the HST, we deduce a value (D/H) = (1.65 +/- 0.35) x 10(-5) (1 sigma error) for the abundance of deuterium in the z(abs) =…

Astrophysics · Physics 2009-11-06 Max Pettini , David V. Bowen

The primordial deuterium abundance at z = 2.504 from a high signal-to-noise spectrum of Q1009+2956

The spectrum of the $z_{\rm em} = 2.63$ quasar Q1009+2956 has been observed extensively on the Keck telescope. The Lyman limit absorption system $z_{\rm abs} = 2.504$ was previously used to measure D/H by Burles & Tytler using a spectrum…

Astrophysics of Galaxies · Physics 2018-04-24 E. O. Zavarygin , J. K. Webb , V. Dumont , S. Riemer-Sørensen

The cosmological baryon density from the deuterium to hydrogen ratio towards QSO absorption systems: D/H towards Q1243+3047

We report the detection of Deuterium absorption at redshift 2.525659 towards Q1243+3047. We describe improved methods to estimate the Deuterium to Hydrogen abundance ratio (D/H) in absorption systems, including improved modeling of the…

Astrophysics · Physics 2009-11-07 David Kirkman , David Tytler , Nao Suzuki , John M. O'Meara , Dan Lubin

Spectroscopy of a narrow-line optical pumping transition in dysprosium

We present measurements of the hyperfine coefficients and isotope shifts of the Dy I $683.731 $nm transition, using saturated absorption spectroscopy on an atomic beam. A King Plot is drawn resulting in an updated value for the specific…

Atomic Physics · Physics 2014-02-27 M. Schmitt , E. A. L. Henn , J. Billy , H. Kadau , T. Maier , A. Griesmaier , T. Pfau

Measurement of the parity-violating asymmetry in inclusive electroproduction of $\pi^-$ near the $\Delta^0$ resonance

The parity-violating (PV) asymmetry of inclusive $\pi^-$ production in electron scattering from a liquid deuterium target was measured at backward angles. The measurement was conducted as a part of the G0 experiment, at a beam energy of 360…

Nuclear Experiment · Physics 2015-06-03 G0 Collaboration , D. Androić , D. S. Armstrong , J. Arvieux , S. L. Bailey , D. H. Beck , E. J. Beise , J. Benesch , F. Benmokhtar , L. Bimbot , J. Birchall , P. Bosted , H. Breuer , C. L. Capuano , Y. -C. Chao , A. Coppens , C. A. Davis , C. Ellis , G. Flores , G. Franklin , C. Furget , D. Gaskell , M. T. W. Gericke , J. Grames , G. Guillard , J. Hansknecht , T. Horn , M. K. Jones , P. M. King , W. Korsch , S. Kox , L. Lee , J. Liu , A. Lung , J. Mammei , J. W. Martin , R. D. McKeown , A. Micherdzinska , M. Mihovilovic , H. Mkrtchyan , M. Muether , S. A. Page , V. Papavassiliou , S. F. Pate , S. K. Phillips , P. Pillot , M. L. Pitt , M. Poelker , B. Quinn , W. D. Ramsay , J. -S. Real , J. Roche , P. Roos , J. Schaub , T. Seva , N. Simicevic , G. R. Smith , D. T. Spayde , M. Stutzman , R. Suleiman , V. Tadevosyan , W. T. H. van Oers , M. Versteegen , E. Voutier , W. Vulcan , S. P. Wells , S. E. Williamson , S. A. Wood

Spatial Variability in the Ratio of Interstellar Atomic Deuterium to Hydrogen. II. Observations toward Gamma2 Velorum and Zeta Puppis by the Interstellar Medium Absorption Profile Spectrograph

To measure interstellar atomic deuterium abundances, we used the Interstellar Medium Absorption Profile Spectrograph (IMAPS) to obtain spectra of gamma2 Vel and zeta Pup over the wavelength interval 930-1150 A at a resolving power of…

Astrophysics · Physics 2010-11-23 George Sonneborn , Todd M. Tripp , Roger Ferlet , Edward B. Jenkins , Ulysses J. Sofia , Alfred Vidal-Madjar , Prezemyslaw R. Wozniak

Coherent electronic-vibrational dynamics in deuterium bromide probed via attosecond transient absorption spectroscopy

Ultrafast laser excitation can trigger multiplex coherent dynamics in molecules. Here, we report attosecond transient absorption experiments addressing simultaneous probing of electronic and vibrational dynamics in a prototype molecule,…

Chemical Physics · Physics 2020-07-01 Yuki Kobayashi , Kristina F. Chang , Sonia Marggi Poullain , Valeriu Scutelnic , Tao Zeng , Daniel M. Neumark , Stephen R. Leone