403 research outputs found
A generalization of Otsu method for linear separation of two unbalanced classes in document image binarization
The classical Otsu method is a common tool in document image binarization. Often, two classes, text and background, are imbalanced, which means that the assumption of the classical Otsu method is not met. In this work, we considered the imbalanced pixel classes of background and text: weights of two classes are different, but variances are the same. We experimentally demonstrated that the employment of a criterion that takes into account the imbalance of the classes' weights, allows attaining higher binarization accuracy. We described the generalization of the criteria for a two-parametric model, for which an algorithm for the optimal linear separation search via fast linear clustering was proposed. We also demonstrated that the two-parametric model with the proposed separation allows increasing the image binarization accuracy for the documents with a complex background or spots.We are grateful for the insightful comments offered by D.P. Nikolaev. This research was partially supported by the Russian Foundation for Basic Research No. 19-29-09066 and 18-07-01387
Giant pulses of pulsar radio emission
Review report of giant pulses of pulsar radio emission, based on our
detections of four new pulsars with giant pulses, and the comparative analysis
of the previously known pulsars with giant pulses, including the Crab pulsar
and millisecond pulsar PSR B1937+21.Comment: Proceedings of the 363. WE-Heraeus Seminar on: Neutron Stars and
Pulsars (Posters and contributed talks) Physikzentrum Bad Honnef, Germany,
May.14-19, 2006, eds. W.Becker, H.H.Huang, MPE Report 291, pp.72-7
Isovector soft dipole mode in 6Be
By using the 1H(6Li,6Be)n charge-exchange reaction, continuum states in 6Be
were populated up to E_t=16 MeV, E_t being the 6Be energy above its three-body
decay threshold. In kinematically complete measurements performed by detecting
alpha+p+p coincidences, an E_t spectrum of high statistics was obtained,
containing approximately ~5x10^6 events. The spectrum provides detailed
correlation information about the well-known 0^+ ground state of 6Be at
E_t=1.37 MeV and its 2^+ state at E_t=3.05 MeV. Moreover, a broad structure
extending from 4 to 16 MeV was observed. It contains negative parity states
populated by Delta L=1 angular momentum transfer without other significant
contributions. This structure can be interpreted as a novel phenomenon, i.e.
the isovector soft dipole mode associated with the 6Li ground state. The
population of this mode in the charge-exchange reaction is a dominant
phenomenon for this reaction, being responsible for about 60% of the cross
section obtained in the measured energy range.Comment: 8 pages, 7 figure
ĐŃОйоннОŃŃи ĐżŃОйОпОдгОŃОвки НиСаŃОв Đ´ĐťŃ ĐżĐžĐ˛ŃŃĐľĐ˝Đ¸Ń ŃŃŃокŃивнОŃŃи вŃĐ´ĐľĐťĐľĐ˝Đ¸Ń ĐąĐľĐťĐşĐžĐ˛ŃŃ ĐżĐ°ŃŃноŃОв ŃоНовŃŃ ĐąĐľĐťĐşĐžĐ˛, кОдиŃŃоПŃŃ ĐłĐľĐ˝Đ°ĐźĐ¸ 18-ОК Ń ŃОПОŃĐžĐźŃ ŃоНОвока
The aim of this work was to test modifications of the standard protocol for the sample preparation of cell/tissue lysate before performing the affinity isolation of lysate protein partners for the target protein (bait protein) which is covalently immobilized on an inert sorbent (e.g. BrCN-, SH-Sepharose 4B) or a carrier (e.g. paramagnetic nanoparticles). The series of our previous works on applying the approach to direct molecular fishing procedure with combination of affinity chromatography and LC-MS/MS analysis using a number of proteins, encoded by the genes of human chromosome 18, have shown that there are at least two problems affecting the specificity and the effectiveness of this procedure. These include: (i) redundancy of the background proteins in the eluates from an affinity sorbent (carrier) due to isolation of multiprotein complexes âlabeledâ with a direct protein partner which binds with a bait protein immobilized on the sorbent; (ii) low enrichment of the eluates with appropriate protein partners due to the fact that some direct protein partners in the lysate exist in stable âwild typeâ complexes with the bait protein itself. This means that latter group of protein partners will not be sufficiently isolated from lysate. Therefore, in order to increase the specificity and efficiency of affinity isolation of protein partners for the bait protein, we modified the standard protocol of lysate preparation and the preliminary step on dissociation of lysate protein complexes was added. Several model experiments for the choice of regeneration solution, assessment of their efficiency in the dissociation of lysate protein complexes as well as the stability and binding capacity of proteins were performed under the control of surface plasmon resonance (SPR) biosensor Biacore 3000 using HepG2 cell lysate. It was shown that acid treatment and incubation of the cell lysate for one min on ice (final lysate dilution 20 times) and subsequent neutralization (pH shift from 2.0 to 7.4) resulted in maximal dissociation of the lysate protein complexes without significant negative effects on the protein-protein interactions tested.ЌоНŃŃ ŃайОŃŃ ĐąŃНО ŃĐşŃпоŃиПонŃĐ°ĐťŃнОо ŃĐľŃŃиŃОванио ПОдиŃикаŃии ŃŃандаŃŃнОгО ĐżŃĐžŃОкОНа ĐżŃОйОпОдгОŃОвки кНоŃĐžŃнОгО/ ŃкановОгО НиСаŃĐ° поŃод вŃпОНнониоП ĐżŃĐžŃодŃŃŃ Đ°ŃŃиннОгО вŃĐ´ĐľĐťĐľĐ˝Đ¸Ń Đ¸Đˇ ногО йоНкОв-паŃŃноŃОв Đ´ĐťŃ ŃоНовОгО йоНка (йоНка-наМивки), иППОйиНиСОваннОгО на иноŃŃнОП ŃĐžŃйонŃĐľ иНи паŃаПагниŃĐ˝ŃŃ
нанОŃĐ°ŃŃиŃĐ°Ń
. ЌикН наŃиŃ
ĐżŃодŃĐ´ŃŃиŃ
ŃайОŃ, пОŃвŃŃоннŃŃ
ĐżŃŃĐźĐžĐźŃ ĐźĐžĐťĐľĐşŃĐťŃŃĐ˝ĐžĐźŃ ŃиŃĐ¸Đ˝ĐłŃ Ń ŃОпŃŃМониоП Ń
ŃОПаŃОгŃĐ°ŃиŃĐľŃкиŃ
и ПаŃŃ-ŃпокŃŃОПоŃŃиŃĐľŃкиŃ
ПоŃОдОв и ŃĐľŃ
нОНОгии паŃаПагниŃĐ˝ŃŃ
нанОŃĐ°ŃŃĐ¸Ń c иŃпОНŃСОваниоП ŃŃĐ´Đ° йоНкОв 18-ОК Ń
ŃОПОŃĐžĐźŃ ŃоНОвока и ŃакМо Đ´ŃŃгиŃ
йоНкОв пОкаСаН, ŃŃĐž ŃŃŃĐľŃŃвŃŃŃ, пО ĐşŃаКно ПоŃĐľ, дво ĐżŃОйНоПŃ, вНиŃŃŃио на ŃпоŃиŃиŃнОŃŃŃ Đ¸ ŃŃŃокŃивнОŃŃŃ Đ´Đ°Đ˝Đ˝ĐžĐš ĐżŃĐžŃодŃŃŃ: (i) иСйŃŃĐžŃнОŃŃŃ ŃОнОвŃŃ
йоНкОв в ŃĐťŃĐ°ŃĐ°Ń
Ń Đ°ŃŃиннОгО ŃĐžŃйонŃĐ°, ОйŃŃĐťĐžĐ˛ĐťĐľĐ˝Đ˝Đ°Ń Đ˛ŃдоНониоП ĐźŃĐťŃŃийоНкОвŃŃ
кОПпНокŃОв, ПоŃонŃŃ
ĐżŃŃĐźŃĐź паŃŃноŃОП, кОŃĐžŃŃĐš ŃвŃСŃваоŃŃŃ Ń ŃоНовŃĐź йоНкОП на ŃĐžŃйонŃĐľ; (ii) Đ˝Đ¸ĐˇĐşĐ°Ń ĐžĐąĐžĐłĐ°ŃоннОŃŃŃ ŃĐťŃĐ°ŃОв йоНкаПи-паŃŃноŃаПи ŃоНовОК ĐłŃŃĐżĐżŃ ĐžĐąŃŃĐťĐžĐ˛ĐťĐľĐ˝Đ˝Đ°Ń ŃоП, ŃŃĐž ŃĐ° иНи Đ¸Đ˝Đ°Ń ŃĐ°ŃŃŃ ĐżŃŃĐźŃŃ
йоНкОв-паŃŃноŃОв в НиСаŃĐľ наŃ
ОдиŃŃŃ Đ˛ ŃĐžŃŃаво ŃŃайиНŃĐ˝ŃŃ
кОПпНокŃОв дикОгО Ńипа Ń ŃаПиП йоНкОП-наМивкОК и но ĐąŃĐ´ĐľŃ Đ˛ Đ´ĐžŃŃĐ°ŃĐžŃнОК ŃŃопони вŃдоНона иС НиСаŃĐ°. ĐĐžŃŃĐžĐźŃ Đ´ĐťŃ ĐżĐžĐ˛ŃŃĐľĐ˝Đ¸Ń ŃпоŃиŃиŃнОŃŃи и ŃŃŃокŃивнОŃŃи Đ°ŃŃиннОгО вŃĐ´ĐľĐťĐľĐ˝Đ¸Ń ĐąĐľĐťĐşĐžĐ˛-паŃŃноŃОв ŃоНовОгО йоНка наПи ĐżŃодНОМона ПОдиŃикаŃĐ¸Ń ŃŃандаŃŃнОК ĐżŃОйОпОдгОŃОвки, СакНŃŃĐ°ŃŃĐ°ŃŃŃ Đ˛ ĐżŃодваŃиŃоНŃнОК диŃŃĐžŃиаŃии йоНкОвŃŃ
кОПпНокŃОв НиСаŃĐ°. ĐОдоНŃĐ˝ŃĐľ ŃĐşŃпоŃиПонŃŃ ĐżĐž вŃйОŃŃ ŃогоноŃĐ°ŃиОннОгО ŃĐ°ŃŃвОŃĐ°, ĐžŃонко ŃŃайиНŃнОŃŃи и ŃвŃСŃваŃŃоК ŃпОŃОйнОŃŃи йоНкОв ĐżŃи огО вОСдоКŃŃвии, Đ° ŃакМо ĐžŃонка ŃŃŃокŃивнОŃŃи диŃŃĐžŃиаŃии кОПпНокŃОв в НиСаŃĐľ ĐąŃНи вŃĐżĐžĐťĐ˝ĐľĐ˝Ń ĐżĐžĐ´ кОнŃŃОНоП ОпŃиŃĐľŃкОгО йиОŃонŃĐžŃĐ° Biacore 3000 (ÂŤGE HealthcareÂť, ХШĐ) Ń Đ¸ŃпОНŃСОваниоП НиСаŃĐ° кНоŃĐžŃнОК ĐşŃĐťŃŃŃŃŃ ĐłĐľĐżĐ°ŃОкаŃŃĐ¸Đ˝ĐžĐźŃ ŃоНОвока (HepG2) и ŃокОПйинанŃĐ˝ŃŃ
ĐżŃопаŃĐ°ŃОв йоНкОв, кОдиŃŃоПŃŃ
гонаПи 18-ОК Ń
ŃОПОŃĐžĐźŃ ŃоНОвока, ĐОкаСанО, ŃŃĐž киŃНОŃĐ˝Đ°Ń ĐžĐąŃайОŃка ŃаСйавНоннОгО в 20 ŃаС НиСаŃĐ° Ń ĐşŃĐ°ŃкОвŃоПоннОК ŃĐşŃпОСиŃиоК в ŃĐľŃонио 1 Пин на ĐťŃĐ´Ń Đ¸ Ń ĐżĐžŃНодŃŃŃоК ноКŃŃаНиСаŃиоК (Ń ŃĐ 2.0 Đ´Đž ŃĐ 7.4) ĐżŃивОдиНа Đş ПакŃиПаНŃнОК диŃŃĐžŃиаŃии йоНкОвŃŃ
кОПпНокŃОв НиСаŃĐ°, но ОкаСŃĐ˛Đ°Ń ŃŃŃĐľŃŃвоннОгО ногаŃивнОгО вНиŃĐ˝Đ¸Ń Đ˝Đ° ŃĐľŃŃиŃŃоПŃĐľ йоНОк- йоНкОвŃĐľ вСаиПОдоКŃŃвиŃ
ĐŃпОНŃСОванио SPR йиОŃонŃĐžŃĐ° ĐżŃи пОиŃко ĐżŃĐžŃĐžŃипОв НокаŃŃŃвоннŃŃ ŃŃодŃŃв на ĐżŃиПоŃĐľ ŃиŃĐžŃ ŃОПа Đ 450(51) в каŃĐľŃŃво йоНка-ПиŃони
The development of the integral platform âFrom Gene to Leadâ, consolidated computer methods, bioinformatics researches, and experimental approaches, significantly accelerated and optimized base structure search in the field of drug design. The necessity of the experimental verification of hundreds virtual structure hypothesis (results of molecular data base selections or de novo construction) requires demands the usage of the high-through out and sensitive methods for validation possible interaction between numerous of selected compounds and particular molecular targets and evaluation of affinity, kinetics and thermodynamics. Surface plasmon resonance (SPR) technology makes it possible to solve all these problems. In this article the methodical aspects of the optical SPR-biosensor usage in the field of drug prototypes selection are described using the human cytochrome P450(51) catalyzing one of the key step of cholesterol biosynthesis as an example.ĐĐ˝ŃогŃĐ°ŃĐ¸Ń ŃаСНиŃĐ˝ŃŃ
кОПпŃŃŃĐľŃĐ˝ŃŃ
, йиОинŃĐžŃПаŃиŃĐľŃкиŃ
и ŃĐşŃпоŃиПонŃĐ°ĐťŃĐ˝ŃŃ
ŃĐľŃ
нОНОгиК в одинŃŃ ĐżĐťĐ°ŃŃĐžŃĐźŃ, пОкŃŃваŃŃŃŃ ĐżŃŃŃ âĐžŃ ĐłĐľĐ˝Đ° Đ´Đž ĐżŃĐžŃĐžŃипа НокаŃŃŃваâ, СнаŃиŃоНŃнО ŃŃкОŃиНа и ОпŃиПиСиŃОваНа пОиŃĐş йаСОвŃŃ
ŃŃŃŃĐşŃŃŃ Đ´ĐťŃ ŃĐžĐˇĐ´Đ°Đ˝Đ¸Ń Đ˝ĐžĐ˛ŃŃ
НокаŃŃŃвоннŃŃ
ĐżŃопаŃĐ°ŃОв. ĐŃи ŃŃОП ноОйŃ
ОдиПОŃŃŃ ŃĐşŃпоŃиПонŃĐ°ĐťŃнОК ĐżŃОвоŃки наКдоннŃŃ
кОПпŃŃŃĐľŃĐ˝ŃПи ПоŃОдаПи ŃĐžŃон ŃŃŃŃĐşŃŃŃĐ˝ŃŃ
гипОŃоС, ĐżŃодŃŃавНŃŃŃиŃ
ŃОйОК вŃйОŃки иС ПОНокŃĐťŃŃĐ˝ŃŃ
йаС даннŃŃ
иНи ŃкОнŃŃŃŃиŃОваннŃŃ
de novo ŃОодинониК, ŃŃойŃĐľŃ ĐżŃивНоŃĐľĐ˝Đ¸Ń ĐąŃŃŃŃŃŃ
и ŃŃвŃŃвиŃоНŃĐ˝ŃŃ
ŃĐşŃинингОвŃŃ
ПоŃОдОв анаНиСа иŃ
вОСПОМнŃŃ
вСаиПОдоКŃŃвиК Ń ĐąĐľĐťĐşĐžĐź-ПиŃонŃŃ. Рв ŃĐťŃŃĐ°Đľ пОСиŃивнОгО ŃоСŃĐťŃŃĐ°ŃĐ° и вОСПОМнОŃŃи кОНиŃĐľŃŃвоннОК ĐžŃонки Đ°ŃŃиннОŃŃи, киноŃики и ŃĐľŃПОдинаПики ПоМПОНокŃĐťŃŃнОгО вСаиПОдоКŃŃвиŃ. ТоŃ
Đ˝ĐžĐťĐžĐłĐ¸Ń ĐżĐžĐ˛ĐľŃŃ
нОŃŃнОгО пНаСПОннОгО ŃоСОнанŃĐ° (SPR) пОСвОНŃĐľŃ ŃĐľŃĐ°ŃŃ Đ˛ŃĐľ поŃĐľŃиŃНоннŃĐľ СадаŃи. РданнОК ŃŃĐ°ŃŃĐľ ŃĐ°ŃŃПаŃŃиваŃŃŃŃ ĐźĐľŃОдиŃĐľŃкио Đ°ŃпокŃŃ ĐżŃĐ¸ĐźĐľĐ˝ĐľĐ˝Đ¸Ń ĐžĐżŃиŃĐľŃкОгО SPR йиОŃонŃĐžŃĐ° Đ´ĐťŃ ĐżĐžĐ¸Ńка ĐżŃĐžŃĐžŃипОв НокаŃŃŃвоннŃŃ
ŃŃодŃŃв на ĐżŃиПоŃĐľ ŃиŃĐžŃ
ŃОПа Đ 450(51) ŃоНОвока, каŃаНиСиŃŃŃŃогО кНŃŃовŃŃ ŃŃĐ°Đ´Đ¸Ń ĐąĐ¸ĐžŃинŃоСа Ń
ОНоŃŃĐľŃина
Progress in 433 MHz RFQ technology at NPK LUTS NIIEFA
The paper is a survey of progress in 433 MHz RFQ technology at Production Complex of Linacs and Cyclotrons
of D.V. Efremov Institute Sci. over past three years. RFQs and APF-cavities are designed as bases for ion accelerators
for different applications. The use of 433 MHz frequency determines high requirements for RFQ manufacture
facilities, which are discussed herein. The test experimental results of RFQ full-scale stands and high power rf testing
data under beam load of 1 MeV on a deuteron RFQ made of chromium copper are presented.ĐŃиводон ĐžĐąĐˇĐžŃ ŃĐ°ĐąĐžŃ ĐżĐž ŃĐžĐˇĐ´Đ°Đ˝Đ¸Ń ĐĐĐФ на 433 ĐĐŃ Đ˛ ĐĐĐ ĐĐŁĐŚ ĐĐĐĐФРиП. Đ.Đ. ĐŃŃоПОва Са пОŃНоднио ŃŃи гОда. ĐĐĐФ и ĐФФ-ŃоСОнаŃĐžŃŃ ĐżĐťĐ°Đ˝Đ¸ŃŃĐľŃŃŃ Đ¸ŃпОНŃСОваŃŃ Đ˛ каŃĐľŃŃво ĐžŃнОвнŃŃ
ŃоСОнаŃĐžŃОв ŃŃкОŃиŃоНоК иОнОв Đ´ĐťŃ ŃаСНиŃĐ˝ŃŃ
ĐżŃиПонониК. ĐŃпОНŃСОванио ŃĐ°ŃŃĐžŃŃ 433 ĐĐŃ ĐžĐżŃодоНŃĐľŃ Đ˛ŃŃОкио ŃŃĐľĐąĐžĐ˛Đ°Đ˝Đ¸Ń Đ´ĐťŃ Đ¸ĐˇĐłĐžŃĐžĐ˛ĐťĐľĐ˝Đ¸Ń ĐĐĐФ, кОŃĐžŃŃĐľ ОйŃŃĐśĐ´ĐľĐ˝Ń Đ˛ ŃŃĐ°ŃŃĐľ. ĐŃодŃŃĐ°Đ˛ĐťĐľĐ˝Ń ŃĐşŃпоŃиПонŃĐ°ĐťŃĐ˝ŃĐľ ŃоСŃĐťŃŃĐ°ŃŃ ŃĐľŃŃиŃĐžĐ˛Đ°Đ˝Đ¸Ń ĐżĐžĐťĐ˝ĐžĐźĐ°ŃŃŃайнŃŃ
ŃŃондОв ĐĐĐФ и даннŃĐľ иŃĐżŃŃаниК ŃоСОнаŃĐžŃĐ° иС Ń
ŃОПиŃŃОК Поди Đ´ĐťŃ ŃŃкОŃĐľĐ˝Đ¸Ń Đ´ĐľĐšŃŃОнОв Đ´Đž ŃноŃгии 1 ĐŃĐ ĐżŃи вŃŃОкОП ŃŃОвно ĐЧ-ПОŃнОŃŃи и нагŃŃСко ĐżŃŃкОП.ĐаводонО ОгНŃĐ´ ŃОйŃŃ ĐˇŃ ŃŃвОŃĐľĐ˝Đ˝Ń ĐĐĐФ на 433 ĐĐŃ Ń ĐĐĐ ĐĐŁĐŚ ĐĐĐĐФРŃĐź. Đ.Đ. ĐŃŃоПОва Са ĐžŃŃаннŃ
ŃŃи ŃОки. ĐĐĐФ Ń ĐФФ-ŃоСОнаŃĐžŃи пНанŃŃŃŃŃŃ Đ˛Đ¸ĐşĐžŃиŃŃĐ°Ńи ŃĐş ĐžŃĐ˝ĐžĐ˛Đ˝Ń ŃоСОнаŃĐžŃи ĐżŃиŃкОŃŃваŃŃв ŃОнŃв Đ´ĐťŃ
ŃŃСниŃ
СаŃŃĐžŃŃванŃ. ĐикОŃиŃŃĐ°Đ˝Đ˝Ń ŃĐ°ŃŃĐžŃи 433 ĐĐŃ Đ˛Đ¸ĐˇĐ˝Đ°ŃĐ°Ń Đ˛Đ¸ŃĐžĐşŃ Đ˛Đ¸ĐźĐžĐłĐ¸ Đ´ĐťŃ Đ˛Đ¸ĐłĐžŃĐžĐ˛ĐťĐľĐ˝Đ˝Ń ĐĐĐФ, ŃĐşŃ
ОйгОвОŃĐľĐ˝Ń Đ˛ ŃŃĐ°ŃŃŃ. ĐŃодŃŃавНонО окŃпоŃиПонŃĐ°ĐťŃĐ˝Ń ŃоСŃĐťŃŃĐ°Ńи ŃĐľŃŃŃĐ˛Đ°Đ˝Đ˝Ń ĐżĐžĐ˛Đ˝ĐžĐźĐ°ŃŃŃайниŃ
ŃŃондŃв
ĐĐĐФ Ń Đ´Đ°Đ˝Ń Đ˛Đ¸ĐżŃОйŃĐ˛Đ°Đ˝Ń ŃоСОнаŃĐžŃĐ° ŃС Ń
ŃОПиŃŃĐžŃ ĐźŃĐ´Ń Đ´ĐťŃ ĐżŃиŃкОŃĐľĐ˝Đ˝Ń Đ´ĐľĐšŃŃОнŃв Đ´Đž оноŃĐłŃŃ 1 ĐоРпŃи
виŃĐžĐşĐžĐźŃ ŃŃĐ˛Đ˝Ń ĐЧ-пОŃŃМнОŃŃŃ Ń Đ˝Đ°Đ˛Đ°Đ˝ŃĐ°ĐśĐľĐ˝Đ˝Ń ĐżŃŃкОП
Classical Yang-Mills Black hole hair in anti-de Sitter space
The properties of hairy black holes in EinsteinâYangâMills (EYM) theory are reviewed, focusing on spherically symmetric solutions. In particular, in asymptotically anti-de Sitter space (adS) stable black hole hair is known to exist for frak su(2) EYM. We review recent work in which it is shown that stable hair also exists in frak su(N) EYM for arbitrary N, so that there is no upper limit on how much stable hair a black hole in adS can possess
Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV
Results are presented from a search for a W' boson using a dataset
corresponding to 5.0 inverse femtobarns of integrated luminosity collected
during 2011 by the CMS experiment at the LHC in pp collisions at sqrt(s)=7 TeV.
The W' boson is modeled as a heavy W boson, but different scenarios for the
couplings to fermions are considered, involving both left-handed and
right-handed chiral projections of the fermions, as well as an arbitrary
mixture of the two. The search is performed in the decay channel W' to t b,
leading to a final state signature with a single lepton (e, mu), missing
transverse energy, and jets, at least one of which is tagged as a b-jet. A W'
boson that couples to fermions with the same coupling constant as the W, but to
the right-handed rather than left-handed chiral projections, is excluded for
masses below 1.85 TeV at the 95% confidence level. For the first time using LHC
data, constraints on the W' gauge coupling for a set of left- and right-handed
coupling combinations have been placed. These results represent a significant
improvement over previously published limits.Comment: Submitted to Physics Letters B. Replaced with version publishe
Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV
A search for a Higgs boson decaying into two photons is described. The
analysis is performed using a dataset recorded by the CMS experiment at the LHC
from pp collisions at a centre-of-mass energy of 7 TeV, which corresponds to an
integrated luminosity of 4.8 inverse femtobarns. Limits are set on the cross
section of the standard model Higgs boson decaying to two photons. The expected
exclusion limit at 95% confidence level is between 1.4 and 2.4 times the
standard model cross section in the mass range between 110 and 150 GeV. The
analysis of the data excludes, at 95% confidence level, the standard model
Higgs boson decaying into two photons in the mass range 128 to 132 GeV. The
largest excess of events above the expected standard model background is
observed for a Higgs boson mass hypothesis of 124 GeV with a local significance
of 3.1 sigma. The global significance of observing an excess with a local
significance greater than 3.1 sigma anywhere in the search range 110-150 GeV is
estimated to be 1.8 sigma. More data are required to ascertain the origin of
this excess.Comment: Submitted to Physics Letters
Measurement of the Lambda(b) cross section and the anti-Lambda(b) to Lambda(b) ratio with Lambda(b) to J/Psi Lambda decays in pp collisions at sqrt(s) = 7 TeV
The Lambda(b) differential production cross section and the cross section
ratio anti-Lambda(b)/Lambda(b) are measured as functions of transverse momentum
pt(Lambda(b)) and rapidity abs(y(Lambda(b))) in pp collisions at sqrt(s) = 7
TeV using data collected by the CMS experiment at the LHC. The measurements are
based on Lambda(b) decays reconstructed in the exclusive final state J/Psi
Lambda, with the subsequent decays J/Psi to an opposite-sign muon pair and
Lambda to proton pion, using a data sample corresponding to an integrated
luminosity of 1.9 inverse femtobarns. The product of the cross section times
the branching ratio for Lambda(b) to J/Psi Lambda versus pt(Lambda(b)) falls
faster than that of b mesons. The measured value of the cross section times the
branching ratio for pt(Lambda(b)) > 10 GeV and abs(y(Lambda(b))) < 2.0 is 1.06
+/- 0.06 +/- 0.12 nb, and the integrated cross section ratio for
anti-Lambda(b)/Lambda(b) is 1.02 +/- 0.07 +/- 0.09, where the uncertainties are
statistical and systematic, respectively.Comment: Submitted to Physics Letters
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