Sudakov Resummations at Higher Orders

We summarize our recent results on the resummation of hard-scattering coefficient functions and on-shell form factors in massless perturbative QCD. The threshold resummation has been extended to the fourth logarithmic order for deep-inelastic scattering, Drell-Yan lepton pair production and Higgs production via gluon-gluon fusion. The leading six infrared pole terms have been derived to all orders in the strong coupling constant for the photon-quark-quark and the (heavy-top) Higgs-gluon-gluon form factors. These results have many implications, most notably they lead to a new best estimate for the Higgs production cross section at the LHC.Comment: 12 pages, LaTeX, 2 eps-figures. Uses modification appbav.cls (included) of the appolb.cls style. Presented by S.M. and A.V. at the conferences `Matter to the Deepest', Ustron (Poland), September '05, and RADCOR 2005, Shonan Village (Japan), October '05. To appear, in the latter case in shortened form, in the proceeding

Three-Loop Results for Quark and Gluon Form Factors

We study the photon-quark-quark and Higgs-gluon-gluon form factors for on-shell massless quarks and gluons in perturbative QCD. Previous third-order results for the quark case are extended by calculating the fermion-loop contributions up to the finite terms in dimensional regularization. For the gluon case the complete set of infrared poles at three loops is derived. Using the exponentiation of the form factor, the latter results are employed to extract a function entering the infrared factorization of general third-order amplitudes. We evaluate the infrared finite absolute ratio of the time-like and space-like gluon form factors up to the fourth order in the strong coupling constant. The result supports previous indications that the perturbative expansion of the Higgs boson production rate at the LHC is under control.Comment: 9 pages, LaTeX. FORM file of main results appended to sourc

Precision determination of the top-quark mass

Precision determinations of the top-quark mass require theory predictions with a well-defined mass parameter in a given renormalization scheme. The top-quark's running mass in the MSbar scheme can be extracted with good precision from the total cross section at next-to-next-to-leading order in QCD. The Monte Carlo top-quark mass parameter measured from comparison to events with top-quark decay products is not identical with the pole mass. Its translation to the pole mass scheme introduces an additional uncertainty of the order of 1 GeV.Comment: Presented at Loops and Legs in Quantum Field Theory 2014, Weimar, Germany and Large Hadron Collider Physics 2014, New York, US

Higher-Order Corrections in Threshold Resummation

We extend the threshold resummation exponents G^N in Mellin-N space to the fourth logarithmic (N^3LL) order collecting the terms alpha_s^2 (alpha_s ln N)^n to all orders in the strong coupling constant as. Comparing the results to our previous three-loop calculations for deep-inelastic scattering (DIS), we derive the universal coefficients B_q and B_g governing the final-state jet functions to order alpha_s^3, extending the previous quark and gluon results by one and two orders. A curious relation is found at second order between these quantities, the splitting functions and the large-angle soft emissions in Drell-Yan type processes. We study the numerical effect of the N^3LL corrections using both the fully exponentiated form and the expansion of the coefficient function in towers of logarithms.Comment: 20 pages, LaTeX, 6 eps-figures. Misprints in equations and fig. 5 correcte

HUBUNGAN PERILAKU MASYARAKAT DENGAN KEJADIAN MALARIA DESA KORE KECAMATAN SANGGAR KABUPATEN BIMA

Malaria adalah penyakit infeksi yang masih menjadi masalah kesehatan masyarakat. Desa Kore merupakan daerah endemis. Pada tahun 2004 terjdi KLB malaria dengan jumlah penderita malaria klinis 1.282 (AMI=264,38 0/00). Perilaku masyarakat (pengetahuan, sikap dan praktik)merupakan salah satu faktor yang erat kaitannya dengan kejadian malaria. Tujuan dari penelitian ini untuk mengetahui hubungan perilaku masyarakat dengan penyakit malaria di Desa Kore Kecamatan Sanggar Kabupaten Bima tahun 2005. Jenis penelitian ini adalah explanatory research menggunakan metode survey dengan pendekatan cross sectional. Populasi dalam penelitian ini adalah kepala keluargadi Desa Kore dengan jumlah sampel 89 responden terdiri dari 56 orang sakit malaria dan 33 tidak sakit. Berdasarkan hasil uji stasitik ada hubungan antara sikap dangan praktek tentang kejadian malaria (p=0,000), perilaku dengan kejadian malaria(p=0,020). Perlu dilakukan penyuluhan, identifikasi jenis nyamuk dan penelitian mendalam tentang perilaku masyarakat yang berperan dalam kasus malaria. Kata Kunci: Perilaku (pengetahuan, sikap dan praktek), malari

The Esthetic of Ornamental Design of Traditional Mask form Malang

The ornament on Malang traditional mask is extremely varied and so function and forms. This is caused by art mask not quit of existence form influence of external culture. Appearance variety of one culture with the other culture be interaction and charge each other, so ornamentation on mask growing up to now. The intercultural of interaction the other canton to be generate new entity of culture acculturation, so that happened on Malang traditional mask till show the uniqueness of individuality of form as well as ornament design from each spread region mask on Malang. This research produce of representation about ornament motif aesthetics aspect which exactly on ornamentation design and the significant diverification toward form, colour in ornament motif than each craftsmans. Know result of the research afterwards necessary existence of furthermore research about ornament design evolution on Malangan Mask, with the result that Malangan mask existence that expanding until now on ornament motif can be native everlasting