48 research outputs found

    Search for dark mesons decaying to top and bottom quarks in proton-proton collisions at √s = 13 TeV with the ATLAS detector

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    A search for dark mesons originating from strongly-coupled, SU(2) dark favor symmetry conserving models and decaying gaugephobically to pure Standard Model final states containing top and bottom quarks is presented. The search targets fully hadronic final states and final states with exactly one electron or muon and multiple jets. The analyzed data sample corresponds to an integrated luminosity of 140 fb−1 of proton-proton collisions collected at √s = 13 TeV with the ATLAS detector at the Large Hadron Collider. No significant excess over the Standard Model background expectation is observed and the results are used to set the first direct constraints on this type of model. The two-dimensional signal space of dark pion masses mπD and dark rho-meson masses mρD is scanned. For mπD /mρD = 0.45, dark pions with masses mπD < 940 GeV are excluded at the 95% CL, while for mπD /mρD = 0.25 masses mπD < 740 GeV are excluded

    Combination of searches for Higgs boson decays into a photon and a massless dark photon using pp collisions at √s = 13 TeV with the ATLAS detector

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    A combination of searches for Higgs boson decays into a visible photon and a massless dark photon (H → γγd) is presented using 139 fb−1 of proton-proton collision data at a centre-of-mass energy of √s = 13 TeV recorded by the ATLAS detector at the Large Hadron Collider. The observed (expected) 95% confidence level upper limit on the Standard Model Higgs boson decay branching ratio is determined to be B(H → γγd) < 1.3% (1.5)%. The search is also sensitive to higher-mass Higgs bosons decaying into the same final state. The observed (expected) 95% confidence level limit on the cross-section times branching ratio ranges from 16 fb (20 fb) for mH = 400 GeV to 1.0 fb (1.5 fb) for mH = 3 TeV. Results are also interpreted in the context of a minimal simplified model

    A novel Synthesis of Naringenin and Related Flavanones

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    Evolutionary Dissociation of ÎłG2 and Gm(n) Antigens

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    Not AvailableVER was studied in female dromedary camels (n=14) concomitant to ultrasound examination at 2 days intervals to evaluate vaginal electrical resistance (VER) as an indicator of follicular activity and pregnancy. VER was recorded using a commercially available resistance probe and scanner was used for ultrasound examination. Females were mated with virile stud camels and the diameter of the follicle at the time of mating recorded. VER and ultrasound examinations were continued till day 30 after mating. Follicles of different diameters were recorded but the follicular growth wave was difficult to define. The growth of follicles in non-mated camels continued with follicles reaching up to 3.72 cm diameter. Ovulations did occur in the mated females even when the size of follicle was 0.8 cm at mating, however, only 50% of the matings resulted into ovulation when the follicle size was <1.0 cm. The use of heat detector for measurement of vaginal electrical resistance in dromedary camel did not give significantly different values, when there was no follicle, follicles with diameter < 0.5 cm, follicle with 0.8 to 0.99 cm, follicle ≄1.0 cm, corpus luteum and pregnant uterus.Not Availabl

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    Not AvailableShort breeding season is important factor responsible for the low reproductive performance of dromedary camel. In the present experiment effect of twice a day parading of male camels in front of herd of female camel in augmenting the “rut’’ in male camels. Four adult male camels belonging to herd of National Research Centre on Camel, Bikaner were used for the present experiment during the month of October. At the end of study it was revealed that behaviour signs of “rut’’ was expressed by all four male camels and the intromission and complete act of copulation could be performed only by two (50%) male camels .Not Availabl
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