ZLZ_L associated pair production of charged Higgs bosons in the littlest Higgs model at e+e−e^{+}e^{-} colliders

The production of single and doubly charged Higgs bosons associated with standard model gauge boson $Z_L$ in $e^{+}e^{-}$ colliders are examined. The sensitivity of these processes on the littlest Higgs model parameters in the range of compatibility with electroweak precision observables are analyzed. The possibility of detecting lepton flavor violation processes are also discussed.Comment: 20 pages, 5 figures, version published in Physical Review

Japan and Europe Network for Neutrino and Intensity Frontier Experimental Research (JENNIFER)

European particle physics groups interested in searching signals of new physics both with neutrinos, at T2K experiment, and at the intensity frontier, with the Belle-II experiment at the SUPERKEKB machine, want to share between them and with KEK laboratory their knowledge in data analysis and detector technologies. Such knowledge sharing will enhance skills and competences of all participants, will allow Europe to play a primary role in the search for deviations from the actually known fundamental physics in the flavour sector and, last but not least, will produce an unprecedented collaboration with japanese scientists on the ground of dissemination and outreach.MSCA-RISE - Marie Skłodowska-Curie Research and Innovation Staff Exchange (RISE) (H2020-MSCA-RISE-2014

Japan and Europe Network for Neutrino and Intensity Frontier Experimental Research 2

JENNIFER2 is the evolution and development of the research and communication activities currently being carried on by the JENNIFER MSCA-RISE project, which will be concluded at the end of march 2019. The new challenges of fundamental physics require to use different complementary approaches and to design experiments able to test different “messengers” of the new physics world. The JENNIFER2 project is actually implementing this requirement, putting together research programs at experimental facilities located in Japan including accelerator produced neutrinos (T2K and HyperK collaborations), cosmic neutrinos detection (HyperK collaboration) and a high luminosity electron-positron collider (Belle II experiment at SUPERKEKB) where very rare processes can be observed. The collaboration of European scientists with the Japanese research community is fostered in all experimental issues, while specific knowledge sharing among different experiments is planned in the field of photon detection, computing, real time and remote controls, data analysis algorithms and theory calculations, aiming to build up real synergies on key technologies and research methodologies, as well as on dissemination and outreach. Such cross-fertilization between different experimental approaches is the crucial step towards an effective multi-messenger approach.Funded under Horizon 2020 Framework Programme, H2020-MSCA-RISE-201

Child-Pugh classification dependent alterations in serum leptin levels among cirrhotic patients: a case controlled study

BACKGROUND: As anorexia and hypermetabolism are common in cirrhosis, leptin levels may be increased in this disease. In this study, we investigated the relation between the severity of disease and serum leptin levels in post-hepatitis cirrhosis and the role of body composition, gender and viral aetiology of cirrhosis in this association. METHODS: Thirty-five cases with post-hepatitis cirrhosis and 15 healthy controls were enrolled in this study. Body composition including body mass index, body fat percentage and body fat mass were determined. Serum leptin levels were assayed. RESULTS: Leptin levels were significantly higher among cirrhotic patients independent of sex compared to controls (p = 0.001). Female patients in both groups have had higher leptin levels than males (in cirrhotics p = 0.029, in controls p = 0.02). Cirrhotic patients in each of A, B and C subgroups according to the Child- Pugh classification revealed significantly different levels compared to controls (p = 0.046, p = 0.004, p = 0.0001, respectively). Male cirrhotics in Child-Pugh Class B and C subgroups had significantly higher leptin levels compared to male controls (p = 0.006, p = 0.008). On the other hand, female patients only in Child Pugh class C subgroup have had higher levels of serum leptin compared to controls (p = 0.022). Child-Pugh classification has been found to be the sole discriminator in determination of leptin levels in cirrhotics by linear regression (beta: 0.435 p = 0.015). CONCLUSION: Serum leptin levels increase in advanced liver disease independently of gender, body composition in posthepatitic cirrhosis. The increase is more abundant among patients that belong to C subgroup according to the Child- Pugh classification

Constraints on scalar-pseudoscalar and tensorial nonstandard interactions and tensorial unparticle couplings from neutrino-electron scattering

Neutrino-electron scattering is a purely leptonic fundamental interaction and therefore provides an important channel to test the Standard Model, especially at the low energy-momentum transfer regime. We derived constraints on neutrino nonstardard interaction couplings depending on model-independent approaches which are described by a four-Fermi pointlike interaction and the unparticle physics model with tensorial components. Data on (nu) over bar (e) - e and nu(e) - e scattering from the TEXONO and LSND experiments, respectively, are used. The upper limits and the allowed regions of scalar, pseudoscalar, and tensorial nonstandard interaction couplings of neutrinos are derived at 90% confidence level in both one-parameter and two-parameter analysis. New upper limits for tensorial unparticle physics coupling constants and mass parameters are also placed

CERN CMS deneyi için en ileri kalorimetre ( Very forward calorimeter )

01.01.2000GERN (Avrupa Parçacık Fiziği Laboratuarı)'de kurulmakta olan büyük hadron çarpıştmcısı LHC'de, 2004 yılında çalışmaya başlayacak CMS (Compact Muon Solenoid) deneyinde ileri kalorimetre (Forward Calorimeter) Cherenkov ışıması esasına göre çalışacak ve yüksek enerjili parçacıkların enerji ve yön ölçümlerinde kullanılacaktır. Türkiye'den TÜBİTAK desteğiyle tüm üye haklan ile katıldığımız CMS deneyinde ileri kalorimetre detektörünün yapımında Amerika, Rusya ve Macaristan grupları üle ortak olarak sorumluluk taşımaktayız. TÜBİTAK TBAG-1591 nolu proje ile desteklenen bu çalışmada ileri kalorimetrede aktif malzeme olarak kullanılacak kuartz optik fiberlerin üretilmesi ve denenmesi çalışmaları yapılmıştır. Kuartz fiber üretimi bu proje . kapsamında ODTÜ-HESFİBEL/Kayseri işbirliğiyle Türkiye'de ilk defa gerçekleştirilmiş bir üretimdir. Üretilen fiberlerin özü (core) saf silika, 300 jam çapındadır. Kaplama malzemeleri ile bu çap 345 um dur. İç kaplama (cladding) malzemesi flourine katkılı silika ve dış koruma (buffer) malzemesi acyrlate dir. Bu fiber tipi MRad düzeylerindeki yüksek radyasyon dozlarına dayanıklıdır. Projemiz kapsamında üretilen fiberler CERN'de çeşitli kalorimetre prototiplerinde ve diğer testlerde benzer teknik özelliklerdeki diğer kuartz fiberler ile birlikte denenmiş, ve radyasyon dayanıklılığı, optik ve mekanik özellikler bakımından CMS deneyinde çalışacak ileri kalorimetrede aktif malzeme olarak kullanılabileceği gösterilmiştir. Bu çalışmanın yürütülmesi ve deneyler TÜBİTAK desteğinin yanında ODTÜ, HESFİBEL fabrikası ve CMS deneyi ileri kalorimetre kollaborasyonuna dahil ülkeler ile ve CERN laboratuarının katkıları gerçekleşmiştir. Uluslararası büyük bir kollaborasyon ortaklığı içinde üniversite-sanayi araştırma ve geliştirme projesi ile gerçekleştirilen bu çalışma deneysel yüksek enerji deneylerine katkıda ülkemizde ulaşılan yeni bir aşamadır

Energy Response and Longitudinal Shower Profiles Measured in CMS HCAL and Comparison With Geant4

The response of the CMS combined electromagnetic and hadron calorimeter to beams of pions with momenta in the range 5-300 GeV/c has been measured in the H2 test beam at CERN. The raw response with the electromagnetic compartment calibrated to electrons and the hadron compartment calibrated to 300 GeV pions may be represented by sigma = (1.2) sqrt{E} oplus (0.095) E. The fraction of energy visible in the calorimeter ranges from 0.72 at 5 GeV to 0.95 at 300 GeV, indicating a substantial nonlinearity. The intrinsic electron to hadron ratios are fit as a function of energy and found to be in the range 1.3-2.7 for the electromagnetic compartment and 1.4-1.8 for the hadronic compartment. The fits are used to correct the non-linearity of the e pi response to 5% over the entire measured range resulting in a substantially improved resolution at low energy. Longitudinal shower profile have been measured in detail and compared to Geant4 models, LHEP-3.7 and QGSP-2.8. At energies below 30 GeV, the data, LHEP and QGSP are in agreement. Above 30 GeV, LHEP gives a more accurate simulation of the longitudinal shower profile

Synchronization and Timing in CMS HCAL

The synchronization and timing of the hadron calorimeter (HCAL) for the Compact Muon Solenoid has been extensively studied with test beams at CERN during the period 2003-4, including runs with 40 MHz structured beam. The relative phases of the signals from different calorimeter segments are timed to 1 ns accuracy using a laser and equalized using programmable delay settings in the front-end electronics. The beam was used to verify the timing and to map out the entire range of pulse shapes over the 25 ns interval between beam crossings. These data were used to make detailed measurements of energy-dependent time slewing effects and to tune the electronics for optimal performance

Design and performance of a hybrid fast and thermal neutron detector

We report the characterization, calibration and performance of a custom-built hybrid detector consisting of BC501A liquid scintillator and BC702 scintillator for the detection of fast and thermal neutrons, respectively. Pulse Shape Discrimination techniques are developed to distinguish events due to gamma-rays, fast and thermal neutrons. Software analysis packages are developed to derive raw neutron energy spectra from measured proton recoil spectra. The validity is demonstrated through the reconstruction of the (AmBe)-Am-241(alpha,n) neutron spectrum. (C) 2017 Elsevier B. V. All rights reserved