Magneto-optical imaging of magnetic deflagration in Mn12-Acetate (2009)
Villuendas, D., Gheorghe, D., Hernández-Mínguez, A., Macià, F., Hernandez, J. M., Tejada, J., ...
For the first time, the morphology and dynamics of spin avalanches in Mn12-Acetate crystals using magneto-optical imaging has been explored. We observe an inhomogeneous relaxation of the...
Propagation of Magnetic Avalanches in Mn12Ac at High Field Sweep Rates (2009)
Tejada, J, Hernandez, J. M, Macia, F
Time-resolved measurements of the magnetization reversal in single crystals of Mn12Ac in pulsed magnetic fields, at magnetic field sweep rates from 1.5 kT/s up to 7 kT/s, suggest a new process that...
Cuadra-Solis, P. J, Hernandez, J. M, Garcia-Santiago, A, Tejada, J
We report magnetic relaxation experiments in a LaSrCuO epitaxial thin film under the action of crossed rf and dc magnetic fields. By applying a swept-frequency technique we found discontinuities in...
High-frequency vortex matching effects in Pb thin films with a periodic array of antidots (2008)
Cuadra-Solis, P. J, Hernandez, J. M, Garcia-Santiago, A, Tejada, J
We study the vortex dynamics and flux-pinning properties of a superconducting thin film of lead with a periodic array of microholes (antidots) by performing high-frequency measurements. We report the...
CMS Monte Carlo production in the WLCG computing Grid (2008)
Hernandez, J. M., Kreuzer, P., Mohapatra, A., De Filippis, N., De Weirdt, S., Hof, C., ...
Monte Carlo production in CMS has received a major boost in performance and scale since the past CHEP06 conference. The production system has been re-engineered in order to incorporate the experience...
Bounding the top and bottom electric dipole moments from neutron experimental data (2007)
Cordero-Cid, A., Hernandez, J. M., Tavares-Velasco, G., Toscano, J. J.
Heavy quarks, namely, the top and bottom quarks, may show great sensitiveness to new physics effects. In particular, they might have unusually large electric dipole moments. This possibility is...
J. M. Hernandez, V. Rybnikov, F. Sanchez
Traditionally in High Energy Physics experiments, online and o#ine computing and software are sharply separated. At the HERA-B experiment the introduction in the online environment of commodity...
Hernández-Mínguez, A., Macià, F., Hernandez, J. M., Abril, G., García-Santiago, A., Tejada, J., ...
Very fast magnetic avalanches in (La, Pr)-based manganites are the signature of a phase transition from an insulating blocked charge-ordered (CO-AFM) state to a charge delocalized ferromagnetic...
CMS physics technical design report, volume II: Physics performance (2007)
Bayatian, G. L., Chatrchyan, S., Hmayakyan, G., Sirunyan, A. M., Adam, W., Bergauer, T., ...
CMS is a general purpose experiment, designed to study the physics of pp collisions at 14 TeV at the Large Hadron Collider ( LHC). It currently involves more than 2000 physicists from more than 150...
Luminosity determination at HERA-B (2007)
Abt, I., Adams, M., Agari, M., Albrecht, H., Aleksandrov, A., Amaral, V., ...
K*(0) and phi meson production in proton-nucleus interactions at root s=41.6 GeV (2007)
Abt, I., Adams, M., Agari, M., Albrecht, H., Aleksandrov, A., Amaral, V., ...
A Measurement of the psi ' to J/psi production ratio in 920 GeV proton-nucleus interactions (2007)
Abt, I., Adams, M., Agari, M., Albrecht, H., Aleksandrov, A., Amaral, V., ...
Phonon-Induced Quantum Magnetic Deflagration in Mn12 (2006)
Hernandez-Minguez, A., Macia, F., Hernandez, J. M., Tejada, J., Santos, P. V.
A comprehensive set of experiments on the effect of high-frequency surface acoustic waves, SAWs, in the spin relaxation in Mn12-acetate is presented. We have studied the quantum magnetic deflagration...
Polarization of Λ and Λ overbar in 920 GeV fixed-target proton–nucleus collisions (2006)
Abt, I., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...
A measurement of the polarization of Λ and baryons produced in pC and pW collisions at has been performed with the HERA-B spectrometer. The measurements cover the kinematic range of 0.6 GeV/c
Abt, I., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...
The cross section ratio RJ/ψ=Br(Υ→l+l−)dσ(Υ)/dy|y=0/σ(J/ψ) has been measured with the HERA-B spectrometer in fixed-target proton–nucleus collisions at 920 GeV proton beam energy...
Abt, I., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...
A new measurement of the b[overline b] production cross section in 920 GeV proton-nucleus collisions is presented by the HERA-B Collaboration. The b[overline b] production is tagged via inclusive...
Distributed Computing Grid Experiences in CMS (2005)
Andreeva, J., Anjum, A., Barrass, T., Bonacorsi, D., Bunn, J., Capiluppi, P., ...
The CMS experiment is currently developing a computing system capable of serving, processing and archiving the large number of events that will be generated when the CMS detector starts taking data....
Quantum Magnetic Deflagration in Mn12 Acetate (2005)
Hernandez-Minguez, A., Hernandez, J. M., Garcia-Santiago, F. MaciaA., Tejada, J., Santos, P. V.
We report controlled ignition of magnetization reversal avalanches by surface acoustic waves in a single crystal of Mn12 acetate. Our data show that the speed of the avalanche exhibits maxima on the...
Low temperature microwave emission from molecular clusters (2004)
Hernandez-Minguez, A., Jordi, M., Amigo, R, Garcia-Santiago, A., Hernandez, J. M., Tejada, J.
We investigate the experimental detection of the electromagnetic radiation generated in the fast magnetization reversal in Mn12-acetate at low temperatures. In our experiments we used large single...
HERA-B data acquisition system (2004)
Dam, M., Egorytchev, V., Essenov, S., Gellrich, A., Hansen, J. D., Hernandez, J. M., ...
The HERA-B Data Acquisition System implements a 50 kHz dead-timeless readout of 500 kB events requiring unprecedented speed of storing and data processing. The system is based on Digital Signal...
Search for the flavor-changing neutral current decay D0→μ0+μ- with the HERA-B detector (2004)
Abt, I., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...
We report on a search for the flavor-changing neutral current decay D0→μ+μ- using 50×106 events recorded with a dimuon trigger in interactions of 920 GeV protons with nuclei by the HERA-B...
Abt, I., Abyzov, A., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...
Using the HERA-B detector, the b (b) over bar production cross section has been measured in 920 GeV proton collisions on carbon and titanium targets. The b (b) over bar production was tagged via...
Inclusive V 0 production cross sections from 920 GeV fixed target proton-nucleus collisions (2003)
Abt, I., Abyzov, A., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...
Inclusive differential cross sections dσpA/dxF and dσpA/dp2t for the production of K0S, Λ, and Λ particles are measured at HERA in proton-induced reactions on C, Al, Ti, and W targets. The...
J/ψ production via χc decays in 920 GeV pA interactions (2003)
Abt, I., Abyzov, A., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...
Using data collected by the HERA-B experiment, we have measured the fraction of J/ψ’s produced via radiative χc decays in interactions of 920 GeV protons with carbon and titanium targets. We...
Offline mass data processing using online computing resources at HERA-B (2003)
Hernandez, J.M., Rybnikov, V., Sánchez, F.
Traditionally in High Energy Physics experiments, online and offline computing and software are sharply separated. At the HERA-B experiment the introduction in the online environment of commodity...
Abt, I., Abyzov, A., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...
Using the HERA-B detector, the b (b) over bar production cross section has been measured in 920 GeV proton collisions on carbon and titanium targets. The b (b) over bar production was tagged via...
J/ψ production via χc decays in 920 GeV pA interactions (2003)
Abt, I., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...
Using data collected by the HERA-B experiment, we have measured the fraction of J/ψ's produced via radiative χc decays in interactions of 920 GeV protons with carbon and titanium targets. We...
Comment on "Magnetic Relaxations of Antiferromagnetic Nanoparticles in Magnetic Fields" (2002)
Del Barco, E., Duran, M., Hernandez, J. M., Tejada, J.
We have carried out in ferritin the Field-Cooling method and data analysis proposed by Mamiya et al. (Phys. Rev. Lett. 88, 67202 (2002) at T = 5 K in order to check the time magnetic relaxation of...
Myofibrillar Ca2+-stimulated Mg2+-ATPase from chronically ischemic canine heart (2002)
Shivalkar, B, Hernandez, J M, Kaplán, P, Lehotský, J
Functional properties of myofibrils from chronically ischemic canine myocardium were evaluated. Ischemia was produced by tight stenosis of left anterior descending artery (LAD), followed by 40 min...
Relaxation and Landau-Zener experiments down to 100 mK in ferritin (2001)
Duran, M., Del Barco, E., Hernandez, J. M., Tejada, J.
Temperature-independent magnetic viscosity in ferritin has been observed from 2 K down to 100 mK, proving that quantum tunneling plays the main role in these particles at low temperature. Magnetic...
Giant and time-dependent magnetocaloric effect in high-spin molecular magnets (2000)
Torres, F., Hernandez, J. M., Bohigas, X., Tejada, J.
We have measured and calculated the magnetocaloric effect in macroscopic samples of oriented high-spin molecular clusters like Mn12 and Fe8 as a function of the temperature and both the intensity and...
Magnetic qubits as hardware for quantum computers (2000)
Tejada, J., Chudnovsky, E. M., Del Barco, E., Hernandez, J. M., Spiller, T. P.
We propose two potential realisations for quantum bits based on nanometre scale magnetic particles of large spin S and high anisotropy molecular clusters. In case (1) the bit-value basis states |0>...
Del Barco, E., Hernandez, J. M., Tejada, J., Chudnovsky, E. M., Molins, E.
Response to the Comment by Bellessa (arXiv:cond-mat/0006441).
Angular and current-target correlations in deep inelastic scattering at HERA (2000)
Breitweg, J., Chekanov, S., Derrick, M., Krakauer, D., Magill, S., Musgrave, B., ...
Correlations between charged particles in deep inelastic e/sup +/p scattering have been studied in the Breit frame with the ZEUS detector at HERA using an integrated luminosity of 6.4 pb/sup -1/....
Breitweg, J., Chekanov, S., Derrick, M., Krakauer, D., Magill, S., Musgave, B., ...
A search for the leptonic decays of W bosons produced in the reaction e/sup +/p to e/sup +/W/sup +or-/X at a centre-of-mass energy of 300 GeV has been performed with the ZEUS detector at HERA using...
Breitweg, J., Chekanov, S., Derrick, M., Krakauer, D., Magill, S., Musgrave, B., ...
The production of D*(+/-)(2010) mesons in deep inelastic scattering has been measured in the ZEUS detector at HERA using an integrated luminosity of 37 pb(-1). The decay channels D*(+) → D(0)pi(+)...
Breitweg, J., Chekanov, S., Derrick, M., Krakauer, D., Magill, S., Musgrave, B., ...
Exclusive electroproduction of rho(o) mesons has been measured using the ZEUS detector at HERA in two Q(2) ranges, 0.25 lt Q(2) lt 0.85 GeV2 and 3 lt Q(2) lt 30 GeV2. The low-Q(2) data span the range...
Search for contact interactions in deep inelastic e(+)p → e(+)X scattering at HERA (2000)
Breitweg, J., Chekanov, S., Derrick, M., Krakauer, D., Magill, S., Musgrave, B., ...
In a search for signatures of physics processes beyond the Standard Model, various eeqq vector contact-interaction hypotheses have been tested using the high-Q(2) deep inelastic neutral-current e(+)p...
Stefanova-Ouzounova, M, Hernandez, J M, Hossfeld, D K, ...
Marginal zone cell lymphomas of the mucosa-associated lymphoid tissue (MALT) are the most common subtype of lymphoma arising at extranodal sites. The t(11;18)(q21;q21) appears to be the key genetic...
Fletcher, C D, Hernandez, J M, Garcia, J L, ...
Inflammatory myofibroblastic tumor (inflammatory pseudotumor) is a pseudosarcomatous lesion that is recognized with increasing frequency in various anatomic locations. However, this lesion has not...
BCL3 rearrangement and t(14;19)(q32;q13) in lymphoproliferative disorders (1996)
Hernandez, J M, ...
Translocation t(14;19)(q32;q13) is a rare but recurrent abnormality in chronic lymphocytic leukemia and small cell lymphoma. It has been associated with rearrangements of the BCL3 gene, which is...
Ferrant, A, Hernandez, J M, Dierlamm, J, ...
Clinical and cytogenetic data were analysed in 54 patients with acute non-lymphocytic leukaemias (ANLL) or MDS (myelodysplastic syndromes) and deletion of the long arm of chromosome 7 (7q-), in order...
Hernandez, J M, Michaux, J L, ...
Structural anomalies of the X chromosome, especially translocations, are rare events in myelodysplastic syndromes (MDS). In a series of 2270 MDS patients analyzed between 1983 and 1994 (Center for...