4,317 research outputs found
An Updated Analysis On The Rise Of The Hadronic Total Cross-section At The Lhc Energy Region
No full textA forward amplitude analysis on pp and elastic scattering above 5 GeV is presented. The dataset includes the recent high-precision TOTEM measurements of the pp total and elastic (integrated) cross-sections at 7 TeV and 8 TeV. Following previous works, the leading high-energy contribution for the total cross-section (σtot) is parametrized as lnγ(s/sh), where γ and s h are free real fit parameters. Singly-subtracted derivative dispersion relations are used to connect σtot and the rho parameter (ρ) in an analytical way. Different fit procedures are considered, including individual fits to σtot data, global fits to σtot and ρ data, constrained and unconstrained data reductions. The results favor a rise of the σtot faster than the log-squared bound by Froissart and Martin at the LHC energy region. The parametrization for σtot is extended to fit the elastic cross-section (σel) data with satisfactory results. The analysis indicates an asymptotic ratio σel/σ tot consistent with 1/3 (as already obtained in a previous work). A critical discussion on the correlation, practical role and physical implications of the parameters γ and sh is presented. The discussion confronts the 2002 prediction of σtot by the COMPETE Collaboration and the recent result by the Particle Data Group (2012 edition of the Review of Particle Physics). Some conjectures on possible implications of a fast rise of the proton-proton total cross-section at the highest energies are also presented. © 2013 World Scientific Publishing Company.2820Froissart, M., (1961) Phys. Rev., 123, p. 1053Martin, A., (1966) Nuovo Cimento A, 42, p. 930Martin, A., (1966) Nuovo Cimento A, 44, p. 1219Lukaszuk, L., Martin, A., (1967) Nuovo Cimento A, 52, p. 122Azimov, Ya.I., (2011) Phys. Rev. D, 84, p. 056012Azimov, Ya.I., Froissart Bounds for Amplitudes and Cross-sections at High Energies, , arXiv:1204.0984 [hep-ph]Azimov, Ya., What Is the Real Meaning of the Froissart Theorem?, , arXiv:1208.4304 [hep-ph]Cudell, J.R., (2002) Phys. Rev. D, 65, p. 074024. , COMPETE CollabCudell, J.R., (2002) Phys. Rev. Lett., 89, p. 201801. , COMPETE CollabIgi, K., Ishida, M., (2002) Phys. Rev. D, 66, p. 034023Igi, K., Ishida, M., (2005) Phys. Lett. B, 622, p. 286Block, M.M., Halzen, F., (2004) Phys. Rev. D, 70, p. 091901Block, M.M., Halzen, F., (2005) Phys. Rev. D, 72, p. 036006Nakamura, K., (2010) J. Phys. G: Nucl. Part. Phys., 37, p. 075021. , Particle Data GroupAntchev, G., (2011) Europhys. Lett., 95, p. 41001. , TOTEM CollabAntchev, G., (2011) Europhys. Lett., 96, p. 21002. , TOTEM CollabAntchev, G., (2012) Europhys. Lett., 98, p. 31002. , TOTEM CollabBeringer, J., (2012) Phys. Rev. D, 86, p. 010001. , http://pdg.lbl.gov, Particle Data GroupFagundes, D.A., Menon, M.J., Silva, P.V.R.G., (2012) Braz. J. Phys., 42, p. 452. , arXiv:1112.4704 [hep-ph]Fagundes, D.A., Menon, M.J., Silva, P.V.R.G., (2013) J. Phys. G: Nucl. Part. Phys., 40, p. 065005. , arXiv:1208.3456 [hep-ph]Amaldi, U., (1977) Phys. Lett. B, 66, p. 390Antchev, G., (2013) Europhys. Lett., 101, p. 21002. , TOTEM CollabAntchev, G., (2013) Europhys. Lett., 101, p. 21004. , TOTEM CollabAntchev, G., (2013) Phys. Rev. Lett., 111, p. 012001. , TOTEM CollabAugier, C., (1993) Phys. Lett. B, 315, p. 503. , UA4/2 CollabKang, K., Nicolescu, B., (1975) Phys. Rev. D, 11, p. 2461Avila, R.F., Menon, M.J., (2004) Nucl. Phys. A, 744, p. 249Bevington, P.R., Robinson, D.K., (1992) Data Reduction and Error Analysis for the Physical Sciences, , 2nd edn. McGraw-Hill, Boston, MassachusettsFagundes, D.A., Menon, M.J., Silva, P.V.R.G., Reply to "Commentary on Total Hadronic Cross-section Data and the Froissart-Martin Bound by Fagundes, Menon and Silva, , arXiv:1211.3352 [hep-ph]Avila, R.F., Luna, E.G.S., Menon, M.J., (2001) Braz. J. Phys., 31, p. 567Avila, R.F., Luna, E.G.S., Menon, M.J., (2003) Phys. Rev. D, 67, p. 054020ROOT Framework, , http://root.cern.ch/drupal/, http://root.cern.ch/root/html/TMinuit.htmlJames, F., (1998) MINUIT Function Minimization and Error Analysis, Reference Manual, Version 94.1, , CERN Program Library Long Writeup D506 (CERN, Geneva, Switzerland)Common, A.K., (1970) Nuovo Cimento, 69, p. 115Abreu, P., (2012) Phys. Rev. Lett., 109, p. 062002. , The Pierre Auger CollabBarone, V., Predazzi, E., (2002) High-Energy Particle Diffraction, , Spring-Verlag, BerlinDonnachie, S., Dosch, G., Landshoff, P.V., Natchmann, O., (2002) Pomeron Physics and QCD, , Cambridge University Press, CambridgeDonnachie, A., Landshoff, P.V., (1979) Z. Phys. C, 2, p. 55Donnachie, A., Landshoff, P.V., (1984) Nucl. Phys. B, 244, p. 322Block, M.M., Halzen, F., (2012) Phys. Rev. D, 86, p. 051504Pumplin, J., (1973) Phys. Rev. D, 8, p. 2899Sukhatme, U.P., Henyey, F.S., (1976) Nucl. Phys. B, 108, p. 317Grau, A., Pacetti, S., Pancheri, G., Srivastava, Y.S., (2012) Phys. Lett. B, 714, p. 70Donnachie, A., Landshoff, P.V., (1992) Phys. Lett. B, 296, p. 227Landshoff, P.V., (2009) Acta Phys. Pol. B, 40, p. 1967Landshoff, P.V., (2009) AIP Conf. Proc., 1105, p. 236. , arXiv:0811.0260 [hep-ph]Donnachie, A., Landshoff, P.V., Elastic Scattering at the LHC, , arXiv:1112.2485 [hep-ph]Kopeliovich, B.Z., Potashnikova, I.K., Povh, B., Predazzi, E., (2000) Phys. Rev. Lett., 85, p. 507Kopeliovich, B.Z., Potashnikova, I.K., Povh, B., (2012) Phys. Rev. D, 86, pp. 051502RPetrov, V.A., Prokudin, A.V., (2002) Eur. Phys. J. C, 23, p. 135Petrov, V.A., Predazzi, E., Prokudin, A., (2003) Eur. Phys. J. C, 28, p. 525Petrov, V.A., Prokudin, A., Three Pomerons Vs DO and TOTEM Data, , arXiv:1212.1924 [hep-ph]Shaham, N., Piran, T., (2013) Phys. Rev. Lett., 110, p. 021101. , arXiv:1204.1488 [astroph. HE]Conceição, R., Deus De J.Dias, Pimenta, M., (2012) Nucl. Phys. A, 888, p. 58. , arXiv:1107.0912 [hep-ph]Menon, M.J., Silva, P.V.R.G., A Study on Analytic Parametrizations for the Proton-proton Cross-sections and Asymptotia, , arXiv:1305.2947 [hep-ph
Total Hadronic Cross Section And The Elastic Slope: An Almost Model-independent Connection
No full textAn almost model-independent parametrization for the ratio of the total cross section to the elastic slope, as function of the center of mass energy, is introduced. The analytical result is based on the approximate relation of this quantity with the ratio R of the elastic to total cross section and empirical fits to the R data from proton-proton scattering above 10 GeV, under the conditions of asymptotic unitarity and the black-disk limit. This parametrization may be useful in studies of extensive air showers and the determination of the proton-proton total cross section from proton-air production cross section in cosmic-ray experiments. © 2012 Elsevier B.V.880111Ulrich, R., Engel, R., Müller, S., Schüssler, F., Unger, M., (2009) Nucl. Phys. B (Proc. Suppl.), 196, p. 335Sokolsky, P., Introduction to Ultrahigh Energy Cosmic Ray Physics (1989) Frontiers in Physics, 76. , Addison-Wesley, New YorkEngel, R., Gaisser, T.K., Lipari, P., Stanev, T., (1998) Phys. Rev. D, 58, p. 014019Engel, R., (2000) Nucl. Phys. B (Proc. Suppl.), 82, p. 221Ávila, R.F., Luna, E.G.S., Menon, M.J., (2003) Phys. Rev. D, 67, p. 054020Glauber, R., (1955) Phys. Rev., 100, p. 629Glauber, R., Matthiae, G., (1970) Nucl. Phys. B, 21, p. 135Matthiae, G., (1994) Rep. Prog. Phys., 57, p. 743Cudell, J.R., (2002) Phys. Rev. Lett., 89 (20), p. 201801. , COMPETE CollaborationCudell, J.R., (2002) Phys. Rev. D, 65, p. 074024. , COMPETE CollaborationNakamura, K., (2010) J. Phys. G, 37, p. 075021. , Particle Data GroupAntchev, G., (2011) Europhys. Lett., 96, p. 21002. , TOTEM CollaborationMartini, A.F., Menon, M.J., Montanha, J., (2004) Braz. J. Phys., 34, p. 263Eden, R.J., (1971) Rev. Mod. Phys., 43, p. 15Froissart, M., (1961) Phys. Rev., 123, p. 1053Martin, A., (1966) Nuovo Cimento A, 42, p. 930Lukaszuk, L., Martin, A., (1967) Nuovo Cimento A, 52, p. 122MacDowell, S.W., Martin, A., (1964) Phys. Rev. B, 135, p. 960Block, M.M., (2006) Phys. Rep., 436, p. 71Block, M.M., Halzen, F., (2011) Phys. Rev. Lett., 107, p. 212002Chou, T.T., Yang, C.N., (1968) Phys. Rev. D, 170, p. 1591Bourrely, C., Soffer, J., Wu, T.T., (1984) Nucl. Phys. B, 247, p. 15Bourrely, C., Soffer, J., Wu, T.T., (1987) Z. Phys. C, 37, p. 369Troshin, S.M., Tyurin, N.E., (2007) Int. J. Mod. Phys. A, 22, p. 4437Troshin, S.M., Tyurin, N.E., (1993) Phys. Lett. B, 316, p. 175http://root.cern.ch/drupal/, URL:http://root.cern.ch/root/html/TMinuit.htmlBevington, P.R., Robinson, D.K., (1992) Data Reduction and Error Analysis for the Physical Sciences, , McGraw-Hill, Boston, Massachusettshttp://durpdg.dur.ac.uk/HEPDATA/REAC, Durham Reaction DatabaseAzimov, Y.I., (2011) Phys. Rev. D, 84, p. 056012Fagundes, D.A., Menon, M.J., Silva, P.V.R.G., Total hadronic cross section data and the Froissart-Martin bound, , arxiv:1112.4704Conceição, R., Dias de Deus, J., Pimenta, M., Proton-proton cross-sections: The interplay between density and radius, , arxiv:1107.091
Self-compression of 4.9 µm pulses to sub-40 fs with 2 mJ energy in Zinc Sulfide
No full textNonlinear self-compression of few-cycle multi-mJ pulses at 4.9 µm in ZnS is presented. 80 fs input pulses are compressed to 37 fs with 2.1 mJ energy at a 1 kHz repetition rate. © 2024 The Author(s
On The Rise Of Proton-proton Cross-sections At High Energies
No full textThe rise of total, elastic and inelastic hadronic cross sections at high energies is investigated by means of an analytical parametrization, with the exponent of the leading logarithm contribution as a free fit parameter. Using derivative dispersion relations with one subtraction, two different fits to proton-proton and antiproton-proton total cross section and ρ parameter data are developed, reproducing well the experimental information in the energy region 5 GeV-7 TeV. The parametrization for the total cross sections is then extended to fit the elastic (integrated) cross section data in the same energy region, with satisfactory results. From these empirical results we extract the energy dependence of several physical quantities: inelastic cross section, ratios elastic/total, inelastic/total cross sections, ratio total-cross-section/ elastic-slope, elastic slope and optical point. All data, fitted and predicted, are quite well described. We find a statistically consistent solution indicating: (1) an increase of the hadronic cross sections with the energy faster than the log-squared bound by Froissart and Martin; (2) asymptotic limits 1/3 and 2/3 for the ratios elastic/total and inelastic/total cross sections, respectively; a result in agreement with unitarity. These indications corroborate recent theoretical arguments by Azimov on the rise of the total cross section. © 2013 IOP Publishing Ltd.406Barone, V., Predazzi, E., (2002) High-Energy Particle Diffraction, , 10.1007/978-3-662-04724-8Donnachie, S., Dosch, G., Landshoff, P.V., Natchmann, O., (2002) Pomeron Physics and QCD, , 10.1017/CBO9780511534935Dremin, I.M., (2012) Elastic Scattering of HadronsKašpar, J., Kundrát, V., Lokajíček, M., Procházka, J., (2011) Nucl. Phys., 843 (1), p. 84. , 10.1016/j.nuclphysb.2010.09.020 0550-3213 BFiore, R., Jenkovszky, L., Orava, R., Predazzi, E., Prokudin, A., Selyugin, O., (2009) Int. J. Mod. 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Phys. - JETP, 28, p. 784Ryskin, M.G., Martin, A.D., Khoze, V.A., Diffractive processes at the LHC (2005) Gribov-75 Memorial Workshop on Quarks, Hadrons, and Strong InteractionsAchilli, A., Hegde, R., Godbole, R.M., Grau, A., Pancheri, G., Srivastava, Y.N., (2008) Phys. Lett., 659 (1-2), p. 137. , 10.1016/j.physletb.2007.09.078 0370-2693 BGrau, A., Godbole, R.M., Pancheri, G., Srivastava, Y.N., (2009) Phys. Lett., 682 (1), p. 55. , 10.1016/j.physletb.2009.10.080 0370-2693 BFagundes, D.A., Menon, M.J., Silva, P.V.R.G., (2012) Reply to 'Commentary on 'Total Hadronic Cross Section Data and the Froissart-Martin Bound' by Fagundes, Menon and Silva'Antchev, G., (2013) Europhys. Lett., 101 (2), p. 21003. , 10.1209/0295-5075/101/21003 0295-5075 21003Antchev, G., (2013) Europhys. Lett., 101 (2), p. 21004. , 10.1209/0295-5075/101/21004 0295-5075 21004Antchev, G., (2012) CERN Report, , The TOTEM CollaborationMenon, M.J., Silva, P.V.R.G., (2012) An Updated Analysis on the Rise of the Hadronic Total Cross-section at the LHC Energy Regio
Ovarian cancer screening in the general population.
No full textDespite significant improvements in therapy, ovarian cancer continues to be a leading cause of death amongst women with gynaecological malignancies. Advanced stage at diagnosis is thought to be a major contributor to mortality. Hence, there is considerable interest in early detection through screening. In the 1990s, Professor Jacobs pioneered the development of a multimodal ovarian cancer screening (OCS) strategy using serum CA125 as the first line screen and pelvic ultrasound as the second line test. This thesis summarises the next steps in the journey with refining of the screening algorithm, feasibility testing in a pilot randomised control trial (RCT) and finally setting up and recruiting 200,000 women into the largest ever RCT . The risk of ovarian cancer in postmenopausal women with elevated CA125 levels was established through a detailed analysis of 1219 pelvic scans from 741 women with raised CA125 levels in the completed trial of 22,000 women. Based on this, the multimodal 'Risk of Ovarian Cancer' (ROC) algorithm was refined and morphology instead of volume was used to interpret the ovarian scans. The refined ROC algorithm was then prospectively evaluated in a pilot RCT of 13,582 postmenopausal women. The trial established that screening using the ROC algorithm was feasible and could achieve high specificity and positive predictive value. The improved performance characteristics of the screening strategy and the experience accumulated in running and organising the pilot trial led to the design and successful implementation of a RCT - the UK Collaborative Trial of Ovarian Cancer Screening (UKCTOCS) - to assess the impact of early detection on disease mortality. The trial commenced in 2001 with recruitment of 202,638 postmenopausal women by September 2005. The issues involved in setting up the trial, recruitment of 202,000 women and the baseline characteristics of this population are described
Correction to: Chamoun et al., Bacterial pathogenesis and interleukin-17: interconnecting mechanisms of immune regulation, host genetics, and microbial virulence that influence severity of infection
No full textChamoun MN, Blumenthal A, Sullivan MJ, Schembri MA, Ulett GC. 2018. Bacterial pathogenesis and interleukin-17: interconnecting mechanisms of immune regulation, host genetics, and microbial virulence that influence severity of infection. Critical Reviews in Microbiology. https://doi.org/10.1080/1040841X.2018.1426556.
When the above article was first published online, the below three corrections were missed.
The author ‘Antje Blumenthal’ was wrongly affiliated to the affiliation “cSchool of Chemistry and Molecular Biosciences, and Australian Infectious Disease Research Centre, The University of Queensland, Brisbane, Australia”. Now this affiliation has been removed for this author.
The affiliation ‘bTranslational Research Institute, The University of Queensland Diamantina Institute, Woolloongabba, Australia’ of the author ‘Antje Blumenthal’ should read ‘bThe University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, Australia’.
In Table 3, the sentence ‘Benefit of manipulating IL-17 levels to improve immunization strategies M. tuberculosis’ should read “Benefit of manipulating IL-17 levels to improve immunization strategies against M. tuberculosis”.No Full Tex
Generation of 22-mJ, 2.0-ps Pulses from a 1-kHz Ho:YLF Regenerative Chirped Pulse Amplifier
No full textWe report a CW-pumped Ho:YLF regenerative amplifier (RA) delivering pulses with 22.5-mJ energy and 2.0-ps duration at 1 kHz. The RA emitting at 2051 nm is broadband-seeded and implemented in a chirped pulse amplification system. © 2024 The Author(s
Pure-rotational 1D-CARS spatiotemporal thermometry with a single regenerative amplifier system
No full textWe report spatiotemporal pure-rotational coherent anti-Stokes Raman spectroscopy (CARS) in a one-dimensional imaging arrangement obtained with a single ultrafast regenerative amplifier system. The femtosecond pump/Stokes photon pairs, used for impulsive excitation, are delivered by an external compressor operating on a ∼35% beam split of the uncompressed amplifier output (2.5 mJ/pulse). The picosecond 1.2 mJ probe pulse is produced via the second-harmonic bandwidth compression (SHBC) of the ∼65% remainder of the amplifier output (4.5 mJ/pulse), which originates from the internal compressor. The two pump/Stokes and probe pulses are spatially, temporally, and repetition-wise correlated at the measurement, and the signal generation plane is relayed by a wide-field coherent imaging spectrometer onto the detector plane, which is refreshed at the same repetition rate as the ultrafast regenerative amplifier system. We demonstrate 1 kHz cinematographic 1D-CARS gas-phase thermometry across an unstable premixed methane/air flame-front, achieved with a single-shot precision <1% and accuracy <3%, 1.4 mm field of view, and an excellent <20 µm line-spread function.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Flight Performance and Propulsio
Elementary Amplitudes In The Multiple Diffraction Theory Of Pp And P P Elastic Scattering
No full textWe discuss some fundamental aspects of the pure-geometrical models related to the connection between the scattering amplitude of composite hadrons and the scattering amplitude of the constituents partons in the multiple diffraction theory. A comparative study of the parton-parton amplitudes currently used in these models is presented, showing its main mathematical and physical features and also a comparison with results from a model-independent analysis, for the dynamical part of the eikonal. © 1993 The American Physical Society.48520072018Chevron,Halliburton,PDVSA,Schlumberger,Tot
Blackening and expansion in elastic hadron scattering
No full textThrough a diffractive approach to elastic scattering, it is shown that hadrons become blacker and larger as the energy increases in the ISR-Tevatron domain. Comparisons are made with the predictions from geometrical models and hybrid eikonal models (Lipatov Pomeron, dual analytical approach). Connections between blackening-expansion effects and hadronic form factors - elementary amplitudes are also reviewed and discussed.744192159460
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