Search

Your search keyword '"Borgia, P"' showing total 1,364 results
Start Over Author "Borgia, P"
1,364 results on '"Borgia, P"'

1. On $N$-Euclidean Logarithmic Moser-Trudinger-Onofri inequality and some geometrical variants

Author

Borgia, Natalino, Cingolani, Silvia, and Mancini, Gabriele

Subjects
Mathematics - Analysis of PDEs, 26D10, 46E30, 46E35, 58E35, 35J92
Abstract

In this paper we consider the $N$-dimensional Euclidean Onofri inequality proved by del Pino and Dolbeault for smooth compactly supported functions in $\mathbb{R}^N$, $N \geq 2$. We extend the inequality to a suitable weighted Sobolev space, although no clear connection with standard Sobolev spaces on $\mathbb{S}^N$ through stereographic projection is present, except for the planar case. Moreover, in any dimension $N \geq 2$, we show that the Euclidean Onofri inequality is equivalent to the logarithmic Moser-Trudinger inequality with sharp constant proved by Carleson and Chang for balls in $\mathbb{R}^N$.

Published
2024

3. New analytical and geometrical aspects on Trudinger-Moser type inequality in 2D

Author

Borgia, Natalino, Cingolani, Silvia, and Mancini, Gabriele

Subjects
Mathematics - Analysis of PDEs, 35A23, 35A15, 35J50, 35B38, 35J15, 45K05, 58J90
Abstract

The present survey is devoted to results on Trudinger-Moser inequalities in two dimension. We give a brief overview of the history of these celebrated inequalities and, starting from the geometric problem that motivated Moser's original work, we discuss the connection between Onofri's inequality for the unit sphere and sharp inequalities on Euclidean domains. Finally, we present recent results and new insights into nonlocal interaction energy functionals in two dimension, involving logarithmic kernels., Comment: submitted for publication on the volume "Singularities, Asymptotics, and Limiting Models", Springer-INdAM series

Published
2024

5. Analysis and Perspectives on the ANA Avatar XPRIZE Competition

Author

Hauser, Kris, Watson, Eleanor, Bae, Joonbum, Bankston, Josh, Behnke, Sven, Borgia, Bill, Catalano, Manuel G., Dafarra, Stefano, van Erp, Jan B. F., Ferris, Thomas, Fishel, Jeremy, Hoffman, Guy, Ivaldi, Serena, Kanehiro, Fumio, Kheddar, Abderrahmane, Lannuzel, Gaelle, Morie, Jacqueline Ford, Naughton, Patrick, NGuyen, Steve, Oh, Paul, Padir, Taskin, Pippine, Jim, Park, Jaeheung, Pucci, Daniele, Vaz, Jean, Whitney, Peter, Wu, Peggy, and Locke, David

Subjects
Computer Science - Robotics, Computer Science - Human-Computer Interaction
Abstract

The ANA Avatar XPRIZE was a four-year competition to develop a robotic "avatar" system to allow a human operator to sense, communicate, and act in a remote environment as though physically present. The competition featured a unique requirement that judges would operate the avatars after less than one hour of training on the human-machine interfaces, and avatar systems were judged on both objective and subjective scoring metrics. This paper presents a unified summary and analysis of the competition from technical, judging, and organizational perspectives. We study the use of telerobotics technologies and innovations pursued by the competing teams in their avatar systems, and correlate the use of these technologies with judges' task performance and subjective survey ratings. It also summarizes perspectives from team leads, judges, and organizers about the competition's execution and impact to inform the future development of telerobotics and telepresence., Comment: 26 pages, preprint of article appearing in International Journal of Social Robotics

Published
2024

9. Bromodomain Factor 5 as a Target for Antileishmanial Drug Discovery

Author

Russell, Catherine N, Carter, Jennifer L, Borgia, Juliet M, Bush, Jacob, Calderón, Félix, Gabarró, Raquel, Conway, Stuart J, Mottram, Jeremy C, Wilkinson, Anthony J, and Jones, Nathaniel G

Subjects
Medical Microbiology, Biomedical and Clinical Sciences, Infectious Diseases, Rare Diseases, Vector-Borne Diseases, Orphan Drug, 5.1 Pharmaceuticals, Development of treatments and therapeutic interventions, Cancer, Good Health and Well Being, Humans, Factor V, Histones, Protein Domains, Antiprotozoal Agents, Drug Discovery, Transcription Factors, Leishmania, bromodomain, drug discovery, epigenetics, structural biology, Medical microbiology
Abstract

Leishmaniases are a collection of neglected tropical diseases caused by kinetoplastid parasites in the genus Leishmania. Current chemotherapies are severely limited, and the need for new antileishmanials is of pressing international importance. Bromodomains are epigenetic reader domains that have shown promising therapeutic potential for cancer therapy and may also present an attractive target to treat parasitic diseases. Here, we investigate Leishmania donovani bromodomain factor 5 (LdBDF5) as a target for antileishmanial drug discovery. LdBDF5 contains a pair of bromodomains (BD5.1 and BD5.2) in an N-terminal tandem repeat. We purified recombinant bromodomains of L. donovani BDF5 and determined the structure of BD5.2 by X-ray crystallography. Using a histone peptide microarray and fluorescence polarization assay, we identified binding interactions of LdBDF5 bromodomains with acetylated peptides derived from histones H2B and H4. In orthogonal biophysical assays including thermal shift assays, fluorescence polarization, and NMR, we showed that BDF5 bromodomains bind to human bromodomain inhibitors SGC-CBP30, bromosporine, and I-BRD9; moreover, SGC-CBP30 exhibited activity against Leishmania promastigotes in cell viability assays. These findings exemplify the potential BDF5 holds as a possible drug target in Leishmania and provide a foundation for the future development of optimized antileishmanial compounds targeting this epigenetic reader protein.

Published
2023

10. Discovery of circulating blood biomarkers in patients with and without Modic changes of the lumbar spine: a preliminary analysis

Author

Aboushaala, Khaled, Chee, Ana V., Toro, Sheila J., Vucicevic, Rajko, Yuh, Catherine, Dourdourekas, Jake, Patel, Ishani K., Espinoza-Orias, Alejandro, Oh, Chundo, Al-Harthi, Lena, Karppinen, Jaro, Goldberg, Edward J., Phillips, Frank M., Colman, Matthew, Williams, Frances M. K., Borgia, Jeffrey A., Green, Stefan, Forsyth, Christopher, An, Howard S., and Samartzis, Dino

Published
2024
Full Text
View/download PDF

11. Reliable data delivery in ICN-IoT environments

Author

Borgia, Eleonora, Bruno, Raffaele, and Passarella, Andrea

Subjects
Computer Science - Networking and Internet Architecture
Abstract

In an IoT environment, which is characterized by a multitude of interconnected smart devices with sensing and computational capabilities, many applications are (i) content-based, that is, they are only interested in finding a given type of content rather than the location of data, and (ii) contextualized, that is, the content is generated and consumed in the proximity of the user. In this context, the Information-Centric Networking (ICN) paradigm is an appealing model for efficiently retrieving application data, and the service decentralization towards the network edge helps to reduce the core network load being the data produced by IoT devices mainly confined in the area where they are generated. MobCCN is an ICN-based data delivery protocol that we designed for operating efficiently in such context [1][2], where static and mobile IoT devices are enriched with ICN functions. Specifically, MobCCN leverages an efficient routing and forwarding protocol, exploiting opportunistic contacts among IoT mobile devices, to fill the Forwarding Interest Base (FIB) tables so as to correctly forward Interest packets towards the intended data producers. In this paper, we aim to enhance the reliability of MobCCN by exploring different retransmissions mechanisms, such as retransmissions based on number of duplicate Interests that are received for the same requested content, periodic retransmissions, single path versus disjoint multi-path forwarding, hysteresis mechanism and combinations of them. Extensive simulation results show that, among the analysed MobCCN variants, the one that implements both periodic retransmissions and a hysteresis-based retransmission process ensures the highest delivery rates (up to 95\%) and the shortest network path, with a very limited traffic overhead due to retransmissions., Comment: This work is partly funded by EC under the H2020 INFRADEV-2019-3 SLICES-DS (951850), the H2020 INFRAIA-02-2020 SLICES-SC (101008468) and the H2020 ICT-2020-1 MARVEL (957337) projects

Published
2022
Full Text
View/download PDF

13. Making opportunistic networks in IoT environments CCN-ready: A performance evaluation of the MobCCN protocol

Author

Borgia, Eleonora, Bruno, Raffaele, and Passarella, Andrea

Subjects
Computer Science - Networking and Internet Architecture
Abstract

In future IoT environments it is expected that the role of personal devices of mobile users in the physical area where IoT devices are deployed will become more and more important. In particular, due to the push towards decentralisation of services towards the edge, it is likely that a significant share of data generated by IoT devices will be needed by other (mobile) nodes nearby, while global Internet access will be limited only to a small fraction of data. In this context, opportunistic networking schemes can be adopted to build efficient content-centric protocols, through which data generated by IoT devices (or by mobile nodes themselves) can be accessed by the other nodes nearby. In this paper, we propose MobCCN, which is an ICN-compliant protocol for this heterogeneous environment. MobCCN is designed to implement the routing and forwarding mechanisms of the main ICN realisations, such as CCN. The original aspect of MobCCN is to implement an efficient opportunistic networking routing scheme to populate the Forwarding Interest Base (FIB) tables of the nodes, in order to guide the propagation of Interest packets towards nodes that store the required data. Specifically, MobCCN defines the utility of each node as a forwarder of Interest packets for a certain type of content, such that Interest packets can be propagated along a positive utility gradient, until reaching some node storing the data. We evaluate MobCCN against protocols representing two possible endpoints of the spectrum, respectively in terms of minimising the data delivery delay and the resource consumption. Performance results show that MobCCN is very effective and efficient, as it guarantees very high delivery rates and low delays, while keeping the total generated traffic at a reasonable level and also saving local resources.

Published
2021
Full Text
View/download PDF

15. El proceso, la prueba y el tiempo del cambio

Author

Puigvert, Sílvia Pereira, Borgia, Gianluca, Galgani, Benedetta, Gómez, Manuel Marchena, Puigvert, Sílvia Pereira, Borgia, Gianluca, Galgani, Benedetta, and Gómez, Manuel Marchena

Published
2024

16. How do intrinsically disordered protein regions encode a driving force for liquid-liquid phase separation?

Author

Borcherds, Wade, Bremer, Anne, Borgia, Madeleine B., and Mittag, Tanja

Subjects
Quantitative Biology - Biomolecules
Abstract

Liquid-liquid phase separation is the mechanism underlying the formation of biomolecular condensates. Disordered protein regions often drive phase separation, but molecular interactions of disordered protein regions are not well understood, sometimes leading to the conflation that all disordered protein regions drive phase separation. Given the critical role of phase separation in many cellular processes, and that dysfunction of phase separation can lead to debilitating diseases, it is important that we understand the interactions and sequence properties underlying phase behavior. A conceptual framework that divides IDRs into interacting and solvating regions has proven particularly useful, and analytical instantiations and coarse-grained models can test our understanding of the driving forces against experimental phase behavior. Validated simulation paradigms enable the exploration of sequence space to help our understanding of how disordered protein regions can encode phase behavior, which IDRs may mediate phase separation in cells, and which IDRs are in contrast highly soluble.

Published
2020

17. Customization and modifications of SignWriting by LIS users

Author

Bianchini, Claudia S., Borgia, Fabrizio, and Castelli, Margherita

Subjects
Computer Science - Computation and Language
Abstract

Historically, the various sign languages (SL) have not developed an own writing system; nevertheless, some systems exist, among which the SignWriting (SW) is a powerful and flexible one. In this paper, we present the mechanisms adopted by signers of the Italian Sign Language (LIS), expert users of SW, to modify the standard SW glyphs and increase their writing skills and/or represent peculiar linguistic phenomena. We identify these glyphs and show which characteristics make them "acceptable" by the expert community. Eventually, we analyze the potentialities of these glyphs in hand writing and in computer-assisted writing, focusing on SWift, a software designed to allow the electronic writing-down of user-modified glyphs., Comment: in French. CORELA - COgnition, REpr{\'e}sentation, LAngage, CERLICO-Cercle Linguistique du Centre et de l'Ouest (France), A para{\^i}tre

Published
2020

19. Author Correction: Dense sampling of bird diversity increases power of comparative genomics

Author

Feng, Shaohong, Stiller, Josefin, Deng, Yuan, Armstrong, Joel, Fang, Qi, Reeve, Andrew Hart, Xie, Duo, Chen, Guangji, Guo, Chunxue, Faircloth, Brant C, Petersen, Bent, Wang, Zongji, Zhou, Qi, Diekhans, Mark, Chen, Wanjun, Andreu-Sánchez, Sergio, Margaryan, Ashot, Howard, Jason Travis, Parent, Carole, Pacheco, George, Sinding, Mikkel-Holger S, Puetz, Lara, Cavill, Emily, Ribeiro, Ângela M, Eckhart, Leopold, Fjeldså, Jon, Hosner, Peter A, Brumfield, Robb T, Christidis, Les, Bertelsen, Mads F, Sicheritz-Ponten, Thomas, Tietze, Dieter Thomas, Robertson, Bruce C, Song, Gang, Borgia, Gerald, Claramunt, Santiago, Lovette, Irby J, Cowen, Saul J, Njoroge, Peter, Dumbacher, John Philip, Ryder, Oliver A, Fuchs, Jérôme, Bunce, Michael, Burt, David W, Cracraft, Joel, Meng, Guanliang, Hackett, Shannon J, Ryan, Peter G, Jønsson, Knud Andreas, Jamieson, Ian G, da Fonseca, Rute R, Braun, Edward L, Houde, Peter, Mirarab, Siavash, Suh, Alexander, Hansson, Bengt, Ponnikas, Suvi, Sigeman, Hanna, Stervander, Martin, Frandsen, Paul B, van der Zwan, Henriette, van der Sluis, Rencia, Visser, Carina, Balakrishnan, Christopher N, Clark, Andrew G, Fitzpatrick, John W, Bowman, Reed, Chen, Nancy, Cloutier, Alison, Sackton, Timothy B, Edwards, Scott V, Foote, Dustin J, Shakya, Subir B, Sheldon, Frederick H, Vignal, Alain, Soares, André ER, Shapiro, Beth, González-Solís, Jacob, Ferrer-Obiol, Joan, Rozas, Julio, Riutort, Marta, Tigano, Anna, Friesen, Vicki, Dalén, Love, Urrutia, Araxi O, Székely, Tamás, Liu, Yang, Campana, Michael G, Corvelo, André, Fleischer, Robert C, Rutherford, Kim M, Gemmell, Neil J, Dussex, Nicolas, Mouritsen, Henrik, Thiele, Nadine, Delmore, Kira, Liedvogel, Miriam, Franke, Andre, Hoeppner, Marc P, and Krone, Oliver

Subjects
Biological Sciences, Genetics, General Science & Technology
Abstract

In Supplementary Table 1 of this Article, 23 samples (B10K-DU-029-32, B10K-DU-029-33, B10K-DU-029-36 to B10K-DU-029-44, B10K-DU- 029-46, B10K-DU-029-47, B10K-DU-029-49 to B10K-DU-029-53, B10K-DU- 029-75 to B10K-DU-029-77, B10K-DU-029-80, and B10K-DU-030-03; styled in boldface in the revised table) were assigned to the incorrect institution. Supplementary Table 1 has been amended to reflect the correct source institution for these samples, and associated data (tissue, museum ID/source specimen ID, site, state/province, latitude, longitude, date collected and sex) have been updated accordingly. The original table is provided as Supplementary Information to this Amendment, and the original Article has been corrected online.

Published
2021

21. Towards improving the e-learning experience for deaf students: e-LUX

Author

Borgia, Fabrizio, Bianchini, Claudia, and de Marsico, Maria

Subjects
Computer Science - Human-Computer Interaction, Computer Science - Computation and Language
Abstract

Deaf people are more heavily affected by the digital divide than many would expect. Moreover, most accessibility guidelines addressing their needs just deal with captioning and audio-content transcription. However, this approach to the problem does not consider that deaf people have big troubles with vocal languages, even in their written form. At present, only a few organizations, like W3C, produced guidelines dealing with one of their most distinctive expressions: Sign Language (SL). SL is, in fact, the visual-gestural language used by many deaf people to communicate with each other. The present work aims at supporting e-learning user experience (e-LUX) for these specific users by enhancing the accessibility of content and container services. In particular, we propose preliminary solutions to tailor activities which can be more fruitful when performed in one's own "native" language, which for most deaf people, especially younger ones, is represented by national SL., Comment: anche ISBN 978-3-319-07436-9

Published
2019
Full Text
View/download PDF

22. A concrete example of inclusive design: deaf-oriented accessibility

Author

Bianchini, Claudia, Borgia, Fabrizio, and de Marsico, Maria

Subjects
Computer Science - Human-Computer Interaction, Computer Science - Computation and Language
Abstract

One of the continuing challenges of Human Computer Interaction research is the full inclusion of people with special needs into the digital world. In particular, this crucial category includes people that experiences some kind of limitation in exploiting traditional information communication channels. One immediately thinks about blind people, and several researches aim at addressing their needs. On the contrary, limitations suffered by deaf people are often underestimated. This often the result of a kind of ignorance or misunderstanding of the real nature of their communication difficulties. This chapter aims at both increasing the awareness of deaf problems in the digital world, and at proposing the project of a comprehensive solution for their better inclusion. As for the former goal, we will provide a bird's-eye presentation of history and evolution of understanding of deafness issues, and of strategies to address them. As for the latter, we will present the design, implementation and evaluation of the first nucleus of a comprehensive digital framework to facilitate the access of deaf people into the digital world., Comment: SCOPUS - ISI?

Published
2019
Full Text
View/download PDF

23. SWift -- A SignWriting improved fast transcriber

Author

Bianchini, Claudia S., Borgia, Fabrizio, Bottoni, Paolo, and de Marsico, Maria

Subjects
Computer Science - Computation and Language, Computer Science - Human-Computer Interaction
Abstract

We present SWift (SignWriting improved fast transcriber), an advanced editor for computer-aided writing and transcribing using SignWriting (SW). SW is devised to allow deaf people and linguists alike to exploit an easy-to-grasp written form of (any) sign language. Similarly, SWift has been developed for everyone who masters SW, and is not exclusively deaf-oriented. Using SWift, it is possible to compose and save any sign, using elementary components called glyphs. A guided procedure facilitates the composition process. SWift is aimed at helping to break down the "electronic" barriers that keep the deaf community away from Information and Communication Technology (ICT). The editor has been developed modularly and can be integrated everywhere the use of SW, as an alternative to written vocal language, may be advisable.

Published
2019
Full Text
View/download PDF

24. SWift -- A SignWriting editor to bridge between deaf world and e-learning

Author

Bianchini, Claudia S., Borgia, Fabrizio, and de Marsico, Maria

Subjects
Computer Science - Human-Computer Interaction, Computer Science - Computation and Language, Computer Science - Computers and Society
Abstract

SWift (SignWriting improved fast transcriber) is an advanced editor for SignWriting (SW). At present, SW is a promising alternative to provide documents in an easy-to-grasp written form of (any) Sign Language, the gestural way of communication which is widely adopted by the deaf community. SWift was developed SW users, either deaf or not, to support collaboration and exchange of ideas. The application allows composing and saving desired signs using elementary components, called glyphs. The procedure that was devised guides and simplifies the editing process. SWift aims at breaking the "electronic" barriers that keep the deaf community away from ICT in general, and from e-learning in particular. The editor can be contained in a pluggable module; therefore, it can be integrated everywhere the use of SW is an advisable alternative to written "verbal" language, which often hinders information grasping by deaf users.

Published
2019
Full Text
View/download PDF

25. Resource production of written forms of Sign Languages by a user-centered editor, SWift (SignWriting improved fast transcriber)

Author

Borgia, Fabrizio, Bianchini, Claudia S., Dalle, Patrice, and de Marsico, Maria

Subjects
Computer Science - Computation and Language
Abstract

The SignWriting improved fast transcriber (SWift), presented in this paper, is an advanced editor for computer-aided writing and transcribing of any Sign Language (SL) using SignWriting (SW). The application is an editor which allows composing and saving desired signs using the SW elementary components, called "glyphs". These make up a sort of alphabet, which does not depend on the national Sign Language and which codes the basic components of any sign. The user is guided through a fully-automated procedure, making the composition process fast and intuitive. SWift pursues the goal of helping to break down the "electronic barriers" that keep deaf people away from the web, and at the same time to support linguistic research about Sign Languages features. For this reason it has been designed with a special attention to deaf user needs, and to general usability issues. The editor has been developed in a modular way, so it can be integrated everywhere the use of SW as an alternative to written "verbal" language may be advisable., Comment: CITATION INDEX

Published
2019

26. GAN-based Pose-aware Regulation for Video-based Person Re-identification

Author

Borgia, Alessandro, Hua, Yang, Kodirov, Elyor, and Robertson, Neil M.

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Video-based person re-identification deals with the inherent difficulty of matching unregulated sequences with different length and with incomplete target pose/viewpoint structure. Common approaches operate either by reducing the problem to the still images case, facing a significant information loss, or by exploiting inter-sequence temporal dependencies as in Siamese Recurrent Neural Networks or in gait analysis. However, in all cases, the inter-sequences pose/viewpoint misalignment is not considered, and the existing spatial approaches are mostly limited to the still images context. To this end, we propose a novel approach that can exploit more effectively the rich video information, by accounting for the role that the changing pose/viewpoint factor plays in the sequences matching process. Specifically, our approach consists of two components. The first one attempts to complement the original pose-incomplete information carried by the sequences with synthetic GAN-generated images, and fuse their feature vectors into a more discriminative viewpoint-insensitive embedding, namely Weighted Fusion (WF). Another one performs an explicit pose-based alignment of sequence pairs to promote coherent feature matching, namely Weighted-Pose Regulation (WPR). Extensive experiments on two large video-based benchmark datasets show that our approach outperforms considerably existing methods.

Published
2019

27. Dense sampling of bird diversity increases power of comparative genomics

Author

Feng, Shaohong, Stiller, Josefin, Deng, Yuan, Armstrong, Joel, Fang, Qi, Reeve, Andrew Hart, Xie, Duo, Chen, Guangji, Guo, Chunxue, Faircloth, Brant C, Petersen, Bent, Wang, Zongji, Zhou, Qi, Diekhans, Mark, Chen, Wanjun, Andreu-Sánchez, Sergio, Margaryan, Ashot, Howard, Jason Travis, Parent, Carole, Pacheco, George, Sinding, Mikkel-Holger S, Puetz, Lara, Cavill, Emily, Ribeiro, Ângela M, Eckhart, Leopold, Fjeldså, Jon, Hosner, Peter A, Brumfield, Robb T, Christidis, Les, Bertelsen, Mads F, Sicheritz-Ponten, Thomas, Tietze, Dieter Thomas, Robertson, Bruce C, Song, Gang, Borgia, Gerald, Claramunt, Santiago, Lovette, Irby J, Cowen, Saul J, Njoroge, Peter, Dumbacher, John Philip, Ryder, Oliver A, Fuchs, Jérôme, Bunce, Michael, Burt, David W, Cracraft, Joel, Meng, Guanliang, Hackett, Shannon J, Ryan, Peter G, Jønsson, Knud Andreas, Jamieson, Ian G, da Fonseca, Rute R, Braun, Edward L, Houde, Peter, Mirarab, Siavash, Suh, Alexander, Hansson, Bengt, Ponnikas, Suvi, Sigeman, Hanna, Stervander, Martin, Frandsen, Paul B, van der Zwan, Henriette, van der Sluis, Rencia, Visser, Carina, Balakrishnan, Christopher N, Clark, Andrew G, Fitzpatrick, John W, Bowman, Reed, Chen, Nancy, Cloutier, Alison, Sackton, Timothy B, Edwards, Scott V, Foote, Dustin J, Shakya, Subir B, Sheldon, Frederick H, Vignal, Alain, Soares, André ER, Shapiro, Beth, González-Solís, Jacob, Ferrer-Obiol, Joan, Rozas, Julio, Riutort, Marta, Tigano, Anna, Friesen, Vicki, Dalén, Love, Urrutia, Araxi O, Székely, Tamás, Liu, Yang, Campana, Michael G, Corvelo, André, Fleischer, Robert C, Rutherford, Kim M, Gemmell, Neil J, Dussex, Nicolas, Mouritsen, Henrik, Thiele, Nadine, Delmore, Kira, Liedvogel, Miriam, Franke, Andre, Hoeppner, Marc P, and Krone, Oliver

Subjects
Biological Sciences, Bioinformatics and Computational Biology, Evolutionary Biology, Genetics, Human Genome, Biotechnology, Generic health relevance, Life on Land, Animals, Birds, Chickens, Conservation of Natural Resources, Datasets as Topic, Finches, Genome, Genomics, Humans, Phylogeny, Selection, Genetic, Synteny, General Science & Technology
Abstract

Whole-genome sequencing projects are increasingly populating the tree of life and characterizing biodiversity1-4. Sparse taxon sampling has previously been proposed to confound phylogenetic inference5, and captures only a fraction of the genomic diversity. Here we report a substantial step towards the dense representation of avian phylogenetic and molecular diversity, by analysing 363 genomes from 92.4% of bird families-including 267 newly sequenced genomes produced for phase II of the Bird 10,000 Genomes (B10K) Project. We use this comparative genome dataset in combination with a pipeline that leverages a reference-free whole-genome alignment to identify orthologous regions in greater numbers than has previously been possible and to recognize genomic novelties in particular bird lineages. The densely sampled alignment provides a single-base-pair map of selection, has more than doubled the fraction of bases that are confidently predicted to be under conservation and reveals extensive patterns of weak selection in predominantly non-coding DNA. Our results demonstrate that increasing the diversity of genomes used in comparative studies can reveal more shared and lineage-specific variation, and improve the investigation of genomic characteristics. We anticipate that this genomic resource will offer new perspectives on evolutionary processes in cross-species comparative analyses and assist in efforts to conserve species.

Published
2020

28. Endothelin-1–Mediated Drug Resistance in EGFR-Mutant Non-Small Cell Lung Carcinoma

Author

Pulido, Inés, Ollosi, Stephen, Aparisi, Salvador, Becker, Jeffrey H, Aliena-Valero, Alicia, Benet, Marta, Rodríguez, María L, López, Adrián, Tamayo-Torres, Eva, Chuliá-Peris, Lourdes, García-Cañaveras, Juan Carlos, Soucheray, Margaret, Dalheim, Annika V, Salom, Juan B, Qiu, Wei, Kaja, Simon, Fernández-Coronado, Javier Alcácer, Alandes, Sandra, Alcácer, Javier, Al-Shahrour, Fátima, Borgia, Jeffrey A, Juan, Oscar, Nishimura, Michael I, Lahoz, Agustín, Carretero, Julián, and Shimamura, Takeshi

Subjects
Biomedical and Clinical Sciences, Clinical Sciences, Oncology and Carcinogenesis, Immunology, Lung, Lung Cancer, Cancer, Evaluation of treatments and therapeutic interventions, 6.1 Pharmaceuticals, Development of treatments and therapeutic interventions, 5.1 Pharmaceuticals, Animals, Antineoplastic Agents, Biological Availability, Carcinoma, Non-Small-Cell Lung, Cell Line, Tumor, Drug Resistance, Neoplasm, Endothelin-1, ErbB Receptors, Erlotinib Hydrochloride, Gefitinib, Humans, Lung Neoplasms, Mice, Mutation, Protein Kinase Inhibitors, Vascular Endothelial Growth Factor A, Vasoconstriction, Xenograft Model Antitumor Assays, Oncology & Carcinogenesis, Biochemistry and cell biology, Oncology and carcinogenesis
Abstract

Progression on therapy in non-small cell lung carcinoma (NSCLC) is often evaluated radiographically, however, image-based evaluation of said therapies may not distinguish disease progression due to intrinsic tumor drug resistance or inefficient tumor penetration of the drugs. Here we report that the inhibition of mutated EGFR promotes the secretion of a potent vasoconstrictor, endothelin-1 (EDN1), which continues to increase as the cells become resistant with a mesenchymal phenotype. As EDN1 and its receptor (EDNR) is linked to cancer progression, EDNR-antagonists have been evaluated in several clinical trials with disappointing results. These trials were based on a hypothesis that the EDN1-EDNR axis activates the MAPK-ERK signaling pathway that is vital to the cancer cell survival; the trials were not designed to evaluate the impact of tumor-derived EDN1 in modifying tumor microenvironment or contributing to drug resistance. Ectopic overexpression of EDN1 in cells with mutated EGFR resulted in poor drug delivery and retarded growth in vivo but not in vitro. Intratumoral injection of recombinant EDN significantly reduced blood flow and subsequent gefitinib accumulation in xenografted EGFR-mutant tumors. Furthermore, depletion of EDN1 or the use of endothelin receptor inhibitors bosentan and ambrisentan improved drug penetration into tumors and restored blood flow in tumor-associated vasculature. Correlatively, these results describe a simplistic endogenous yet previously unrealized resistance mechanism inherent to a subset of EGFR-mutant NSCLC to attenuate tyrosine kinase inhibitor delivery to the tumors by limiting drug-carrying blood flow and the drug concentration in tumors. SIGNIFICANCE: EDNR antagonists can be repurposed to improve drug delivery in VEGFA-secreting tumors, which normally respond to TKI treatment by secreting EDN1, promoting vasoconstriction, and limiting blood and drug delivery.

Published
2020

29. CXCR7 Reactivates ERK Signaling to Promote Resistance to EGFR Kinase Inhibitors in NSCLC

Author

Becker, Jeffrey H, Gao, Yandi, Soucheray, Margaret, Pulido, Ines, Kikuchi, Eiki, Rodríguez, María L, Gandhi, Rutu, Lafuente-Sanchis, Aranzazu, Aupí, Miguel, Alcácer Fernández-Coronado, Javier, Martín-Martorell, Paloma, Cremades, Antonio, Galbis-Caravajal, José M, Alcácer, Javier, Christensen, Camilla L, Simms, Patricia, Hess, Ashley, Asahina, Hajime, Kahle, Michael P, Al-Shahrour, Fatima, Borgia, Jeffrey A, Lahoz, Agustín, Insa, Amelia, Juan, Oscar, Jänne, Pasi A, Wong, Kwok-Kin, Carretero, Julian, and Shimamura, Takeshi

Subjects
Biomedical and Clinical Sciences, Clinical Sciences, Oncology and Carcinogenesis, Lung Cancer, Cancer, Lung, Clinical Research, 5.1 Pharmaceuticals, Development of treatments and therapeutic interventions, Animals, Carcinoma, Non-Small-Cell Lung, Cell Line, Tumor, Drug Resistance, Neoplasm, Epithelial-Mesenchymal Transition, ErbB Receptors, Humans, Lung Neoplasms, MAP Kinase Signaling System, Mice, Transgenic, Mutation, Neoplasms, Experimental, Protein Kinase Inhibitors, Receptors, CXCR, beta-Arrestins, Oncology & Carcinogenesis, Biochemistry and cell biology, Oncology and carcinogenesis
Abstract

Although EGFR mutant-selective tyrosine kinase inhibitors (TKI) are clinically effective, acquired resistance can occur by reactivating ERK. We show using in vitro models of acquired EGFR TKI resistance with a mesenchymal phenotype that CXCR7, an atypical G protein-coupled receptor, activates the MAPK-ERK pathway via β-arrestin. Depletion of CXCR7 inhibited the MAPK pathway, significantly attenuated EGFR TKI resistance, and resulted in mesenchymal-to-epithelial transition. CXCR7 overexpression was essential in reactivation of ERK1/2 for the generation of EGFR TKI-resistant persister cells. Many patients with non-small cell lung cancer (NSCLC) harboring an EGFR kinase domain mutation, who progressed on EGFR inhibitors, demonstrated increased CXCR7 expression. These data suggest that CXCR7 inhibition could considerably delay and prevent the emergence of acquired EGFR TKI resistance in EGFR-mutant NSCLC. SIGNIFICANCE: Increased expression of the chemokine receptor CXCR7 constitutes a mechanism of resistance to EGFR TKI in patients with non-small cell lung cancer through reactivation of ERK signaling.

Published
2019

31. Whole breast radiotherapy in cN0 early breast cancer patients with pathological sentinel lymph nodes (pN1mic, pN1a) without axillary dissection: preliminary results of the observational LISEN trial

Author

Ursini, Lucia Anna, Nuzzo, Marianna, Rosa, Consuelo, Borgia, Marzia, Caravatta, Luciana, Di Tommaso, Monica, Trignani, Marianna, Di Guglielmo, Fiorella Cristina, Ausili Cefaro, Giampiero, Angelucci, Domenico, Muzi, Marzia, Martino, Gianluigi, Cianchetti, Ettore, Grossi, Simona, Tavoletta, Saveria, Brocco, Davide, Grassadonia, Antonino, Tinari, Nicola, Gildetti, Simona, D’Ostilio, Nicola, Stuppia, Liborio, Porreca, Annamaria, Di Nicola, Marta, and Genovesi, Domenico

Published
2022
Full Text
View/download PDF

32. Innovations in Experiential Learning for Adult Learners

Author

Sisselman-Borgia, Amanda G. and Torino, Gina C.

Abstract

While there is no single profile of the adult learner in the 21st century, there exists a common desire to obtain a degree in higher education. Adult learners as a group are comprised of a large number of women and individuals from various racial/ethnic groups. In addition, they often possess varied learning styles and maintain multiple roles and responsibilities. Many learners may be interested in gaining entrance to the workforce for the first time, may be seeking a career change, or may be looking to advance one's current career status. Thus, as students learn, it becomes important for them to gain valuable experiential learning opportunities, apply prior knowledge, gain new knowledge, and increase career opportunities upon graduation. One valuable vehicle to achieve these goals is participation in internships. This article will discuss a case study and will describe a pilot program designed to provide adult learners with an experiential learning opportunity in the community for college credit. Issues involved in creating such opportunities for adult learners will be addressed, as will successes and barriers to success. Use of theory related to the scholarship of teaching and adult development, in particular the work of Mezirow, Brookfield, and Boyer, will be used to connect adult education to the need for experiential learning, as distinguished from prior life experience. Recommendations for internship development for adult learners will be discussed.

Published
2017

33. Pressure transient analysis during CO2 push-pull tests into faults for EGS characterization

Author

Jung, Yoojin, Doughty, Christine, Borgia, Andrea, Lee, Kyung Jae, Oldenburg, Curtis M, Pan, Lehua, Daley, Thomas M, Zhang, Rui, Altundas, Bilgin, Chugunov, Nikita, and Ramakrishnan, TS

Subjects
Earth Sciences, Engineering, Geology, Geophysics, 4.2 Evaluation of markers and technologies, Enhanced geothermal sites, CO2 push-pull, Pressure transient, Desert Peak geothermal field, Sensitivity analysis, Parameter estimation, Inverse modeling, iTOUGH2, Resources Engineering and Extractive Metallurgy, Geochemistry & Geophysics, Resources engineering and extractive metallurgy
Abstract

With the goal of detecting and characterizing faults and fractures in enhanced geothermal systems (EGS), a new technology involving CO2 push-pull testing, active-source geophysical imaging, and well logging has recently been proposed. This technique takes advantage of (1) the contrasting properties of supercritical CO2 and water which cause CO2 to appear distinct from surrounding brine in seismic and other geophysical logging approaches, (2) the non-wetting nature of CO2 which keeps it localized to the faults and fractures to create contrast potentially sufficient for active seismic and well-logging approaches to image faults and fracture zones at EGS sites. In this study, we evaluate the feasibility of using pressure transient monitoring during CO2 push-pull tests to complement active seismic and wireline well logging for EGS characterization. For this purpose, we developed a 2D model of a prototypical geothermal site (Desert Peak, NV) that includes a single fault. The fault zone consists of a slip plane, fault gouge, and damage zone, and is bounded by the surrounding matrix of the country rock. Through numerical simulation using iTOUGH2, we found that the pressure transient at the monitoring wells in the fault gouge shows unique traits due to the multiphase flow conditions developed by CO2 injection, and varies sensitively on the arrival of the CO2 plume and the degree of CO2 saturation. A sensitivity analysis shows the pressure transient is most sensitive to the fault gouge permeability, but also depends on multiphase flow parameters and the boundary conditions of the fault. An inversion study reveals that the fault gouge permeability can be best estimated with the pressure transient data, whereas additional CO2 saturation data do not improve the accuracy of the inversion significantly.

Published
2018

34. Pressure transient analysis during CO2 push-pull tests into faults for EGS characterization

Author

Jung, Y, Doughty, C, Borgia, A, Lee, KJ, Oldenburg, CM, Pan, L, Daley, TM, Zhang, R, Altundas, B, Chugunov, N, and Ramakrishnan, TS

Subjects
Enhanced geothermal sites, CO2 push-pull, Pressure transient, Desert Peak geothermal field, Sensitivity analysis, Parameter estimation, Inverse modeling, iTOUGH2, Geochemistry & Geophysics, Geology, Geophysics, Resources Engineering and Extractive Metallurgy
Abstract

With the goal of detecting and characterizing faults and fractures in enhanced geothermal systems (EGS), a new technology involving CO2 push-pull testing, active-source geophysical imaging, and well logging has recently been proposed. This technique takes advantage of (1) the contrasting properties of supercritical CO2 and water which cause CO2 to appear distinct from surrounding brine in seismic and other geophysical logging approaches, (2) the non-wetting nature of CO2 which keeps it localized to the faults and fractures to create contrast potentially sufficient for active seismic and well-logging approaches to image faults and fracture zones at EGS sites. In this study, we evaluate the feasibility of using pressure transient monitoring during CO2 push-pull tests to complement active seismic and wireline well logging for EGS characterization. For this purpose, we developed a 2D model of a prototypical geothermal site (Desert Peak, NV) that includes a single fault. The fault zone consists of a slip plane, fault gouge, and damage zone, and is bounded by the surrounding matrix of the country rock. Through numerical simulation using iTOUGH2, we found that the pressure transient at the monitoring wells in the fault gouge shows unique traits due to the multiphase flow conditions developed by CO2 injection, and varies sensitively on the arrival of the CO2 plume and the degree of CO2 saturation. A sensitivity analysis shows the pressure transient is most sensitive to the fault gouge permeability, but also depends on multiphase flow parameters and the boundary conditions of the fault. An inversion study reveals that the fault gouge permeability can be best estimated with the pressure transient data, whereas additional CO2 saturation data do not improve the accuracy of the inversion significantly.

Published
2018

35. Simulations of carbon dioxide push-pull into a conjugate fault system modeled after Dixie Valley-Sensitivity analysis of significant parameters and uncertainty prediction by data-worth analysis

Author

Lee, Kyung Jae, Oldenburg, Curtis M, Doughty, Christine, Jung, Yoojin, Borgia, Andrea, Pan, Lehua, Zhang, Rui, Daley, Thomas M, Altundas, Bilgin, and Chugunov, Nikita

Subjects
Enhanced geothermal sites, CO2 push-pull, Dixie Valley geothermal system, Sensitivity analysis, Data-worth analysis, Geochemistry & Geophysics, Geophysics, Geology, Resources Engineering and Extractive Metallurgy
Published
2018

36. Simulations of carbon dioxide push-pull into a conjugate fault system modeled after Dixie Valley—Sensitivity analysis of significant parameters and uncertainty prediction by data-worth analysis

Author

Lee, KJ, Oldenburg, CM, Doughty, C, Jung, Y, Borgia, A, Pan, L, Zhang, R, Daley, TM, Altundas, B, and Chugunov, N

Subjects
Enhanced geothermal sites, CO2 push-pull, Dixie Valley geothermal system, Sensitivity analysis, Data-worth analysis, Geochemistry & Geophysics, Geology, Geophysics, Resources Engineering and Extractive Metallurgy
Abstract

Characterizing the faults and fractures that provide flow pathways for efficient geothermal energy production is critical for design of sustainable geothermal energy production. Both natural faults and stimulated fractures in enhanced geothermal systems (EGS) are difficult to image and map by seismic methods because hot brine filling the fractures and faults does not create a strong seismic property contrast relative to surrounding rock. We investigate here the technical feasibility of using supercritical CO2 (scCO2) injection into faults in a single-well push-pull scenario to characterize the hydraulic properties of the fault zone by emplacing scCO2 that can serve as a contrast fluid for seismic monitoring. We develop a conceptual and numerical reservoir model of two intersecting faults based on the Dixie Valley geothermal system in Nevada, USA. The 2D conceptual model consists of a system with a main fault and an intersecting conjugate fault. The corresponding numerical model is discretized using irregular grid blocks with fine discretization around the slip plane, gouge, and damage zones. We perform forward modeling along with sensitivity and data-worth analyses of scCO2 push-pull to investigate the CO2 distribution in the fault gouge during 30 days of push (injection) and 30 days of pull (production). Formal sensitivity analysis is conducted to determine the most controlling unknown parameters in the fault zones. Using the selected set of unknown parameters and output responses, we perform data-worth analysis to reveal the most valuable output response to be measured for the best prediction of CO2 distribution in the fault zones and its uncertainty. From the results of data-worth analysis, we determine the optimal properties to target in monitoring, their locations, and the minimum observation time. Our results provide information on the optimal design of scCO2 push-pull testing in a conjugate fault system modeled after Dixie Valley that can be used to enhance monitoring by active seismic and well-logging methods to better characterize the transmissive fault(s).

Published
2018

38. Genotype–phenotype correlations and disease mechanisms in PEX13-related Zellweger spectrum disorders

Author

Borgia, Paola, Baldassari, Simona, Pedemonte, Nicoletta, Alkhunaizi, Ebba, D’Onofrio, Gianluca, Tortora, Domenico, Calì, Elisa, Scudieri, Paolo, Balagura, Ganna, Musante, Ilaria, Diana, Maria Cristina, Pedemonte, Marina, Vari, Maria Stella, Iacomino, Michele, Riva, Antonella, Chimenz, Roberto, Mangano, Giuseppe D., Mohammadi, Mohammad Hasan, Toosi, Mehran Beiraghi, Ashrafzadeh, Farah, Imannezhad, Shima, Karimiani, Ehsan Ghayoor, Accogli, Andrea, Schiaffino, Maria Cristina, Maghnie, Mohamad, Soler, Miguel Angel, Echiverri, Karl, Abrams, Charles K., Striano, Pasquale, Fortuna, Sara, Maroofian, Reza, Houlden, Henry, Zara, Federico, Fiorillo, Chiara, and Salpietro, Vincenzo

Published
2022
Full Text
View/download PDF

39. Correction: Refining colorectal cancer classification and clinical stratification through a single-cell atlas

Author

Khaliq, Ateeq M., Erdogan, Cihat, Kurt, Zeyneb, Turgut, Sultan Sevgi, Grunvald, Miles W., Rand, Tim, Khare, Sonal, Borgia, Jefrey A., Hayden, Dana M., Pappas, Sam G., Govekar, Henry R., Kam, Audrey E., Reiser, Jochen, Turaga, Kiran, Radovich, Milan, Zang, Yong, Qiu, Yingjie, Liu, Yunlong, Fishel, Melissa L., Turk, Anita, Gupta, Vineet, Al-Sabti, Ram, Subramanian, Janakiraman, Kuzel, Timothy M., Sadanandam, Anguraj, Waldron, Levi, Hussain, Arif, Saleem, Mohammad, El-Rayes, Bassel, Salahudeen, Ameen A., and Masood, Ashiq

Published
2022
Full Text
View/download PDF

40. Refining colorectal cancer classification and clinical stratification through a single-cell atlas

Author

Khaliq, Ateeq M., Erdogan, Cihat, Kurt, Zeyneb, Turgut, Sultan Sevgi, Grunvald, Miles W., Rand, Tim, Khare, Sonal, Borgia, Jeffrey A., Hayden, Dana M., Pappas, Sam G., Govekar, Henry R., Kam, Audrey E., Reiser, Jochen, Turaga, Kiran, Radovich, Milan, Zang, Yong, Qiu, Yingjie, Liu, Yunlong, Fishel, Melissa L., Turk, Anita, Gupta, Vineet, Al-Sabti, Ram, Subramanian, Janakiraman, Kuzel, Timothy M., Sadanandam, Anguraj, Waldron, Levi, Hussain, Arif, Saleem, Mohammad, El-Rayes, Bassel, Salahudeen, Ameen A., and Masood, Ashiq

Published
2022
Full Text
View/download PDF

42. Population-Tailored Care for Homeless Veterans and Acute Care Use, Cost, and Satisfaction: A Prospective Quasi-Experimental Trial

Author

O’Toole, Thomas P, Johnson, Erin E, Borgia, Matthew, Noack, Amy, Yoon, Jean, Gehlert, Elizabeth, and Lo, Jeanie

Subjects
Health Services and Systems, Health Sciences, Clinical Trials and Supportive Activities, Homelessness, Behavioral and Social Science, Prevention, Health Services, Clinical Research, Good Health and Well Being, Adult, Chronic Disease, Critical Care, Female, Ill-Housed Persons, Humans, Male, Middle Aged, Non-Randomized Controlled Trials as Topic, Patient Satisfaction, Patient-Centered Care, Prospective Studies, Single-Blind Method, Substance-Related Disorders, Surveys and Questionnaires, United States, United States Department of Veterans Affairs, Veterans, Public Health and Health Services, Epidemiology, Health services and systems, Public health
Abstract

IntroductionAlthough traditional patient-centered medical homes (PCMHs) are effective for patients with complex needs, it is unclear whether homeless-tailored PCMHs work better for homeless veterans. We examined the impact of enrollment in a Veterans Health Administration (VHA) homeless-tailored PCMH on health services use, cost, and satisfaction compared with enrollment in a traditional, nontailored PCMH.MethodsWe conducted a prospective, multicenter, quasi-experimental, single-blinded study at 2 VHA medical centers to assess health services use, cost, and satisfaction during 12 months among 2 groups of homeless veterans: 1) veterans receiving VHA homeless-tailored primary care (Homeless-Patient Aligned Care Team [H-PACT]) and 2) veterans receiving traditional primary care services (PACT). A cohort of 266 homeless veterans enrolled from June 2012 through January 2014.ResultsCompared with PACT patients, H-PACT patients had more social work visits (4.6 vs 2.7 visits) and fewer emergency department (ED) visits for ambulatory care-sensitive conditions (0 vs 0.2 visits); a significantly smaller percentage of veterans in H-PACT were hospitalized (23.1% vs 35.4%) or had mental health-related ED visits (34.1% vs 47.6%). We found significant differences in primary care provider-specific visits (H-PACT, 5.1 vs PACT, 3.6 visits), mental health care visits (H-PACT, 8.8 vs PACT, 13.4 visits), 30-day prescription drug fills (H-PACT, 40.5 vs PACT, 58.8 fills), and use of group therapy (H-PACT, 40.1% vs PACT, 53.7%). Annual costs per patient were significantly higher in the PACT group than the H-PACT group ($37,415 vs $28,036). In logistic regression model of acute care use, assignment to the H-PACT model was protective as was rating health "good" or better.ConclusionHomeless veterans enrolled in the population-tailored primary care approach used less acute care and costs were lower. Tailored-care models have implications for care coordination in the US Department of Veterans Affairs VA and community health systems.

Published
2018

43. Simulations of CO2 injection into fractures and faults for improving their geophysical characterization at EGS sites

Author

Borgia, Andrea, Oldenburg, Curtis M, Zhang, Rui, Pan, Lehua, Daley, Thomas M, Finsterle, Stefan, and Ramakrishnan, TS

Subjects
Earth Sciences, Engineering, Geology, Geophysics, CO2 injection, Faults characterization, Faults imaging, Seismic imaging, EGS, Resources Engineering and Extractive Metallurgy, Geochemistry & Geophysics, Resources engineering and extractive metallurgy
Abstract

We propose the use of CO2 in push-pull well tests to improve geophysical identification and characterization of fractures and faults at enhanced geothermal system (EGS) sites. Using TOUGH2/ECO2N, we carried out numerical experiments of push-pull injection-production cycling of CO2 into idealized vertical fractures and faults to produce pressure-saturation-temperature conditions that can be analyzed for their geophysical response. Our results show that there is a strong difference between injection and production mainly because of CO2 buoyancy. While the CO2-plume grows laterally and upward during injection, not all CO2 is recovered during the subsequent production phase. Even under the best conditions for recovery, at least 10% of the volume of the pores still remains filled with CO2. To improve EGS characterization, comparisons can be made of active seismic methods carried out before and after (time lapse mode) CO2 injection into the fracture or fault. We find that across the CO2 saturation range, C11 (the normal stiffness in the horizontal direction perpendicular to the fracture plane) varies between maximum and minimum values by about 15%. It reaches a maximum at around 6% gas saturation, decreasing exponentially to a minimum at higher saturations. Our results suggest that CO2 injection can be effectively used to infiltrate fault and fracture zones reaching about optimal saturation values in order to enhance seismic imaging at EGS sites.

Published
2017

44. Simulations of CO2 injection into fractures and faults for improving their geophysical characterization at EGS sites

Author

Borgia, A, Oldenburg, CM, Zhang, R, Pan, L, Daley, TM, Finsterle, S, and Ramakrishnan, TS

Subjects
CO2 injection, Faults characterization, Faults imaging, Seismic imaging, EGS, Geochemistry & Geophysics, Geology, Geophysics, Resources Engineering and Extractive Metallurgy
Abstract

We propose the use of CO2 in push-pull well tests to improve geophysical identification and characterization of fractures and faults at enhanced geothermal system (EGS) sites. Using TOUGH2/ECO2N, we carried out numerical experiments of push-pull injection-production cycling of CO2 into idealized vertical fractures and faults to produce pressure-saturation-temperature conditions that can be analyzed for their geophysical response. Our results show that there is a strong difference between injection and production mainly because of CO2 buoyancy. While the CO2-plume grows laterally and upward during injection, not all CO2 is recovered during the subsequent production phase. Even under the best conditions for recovery, at least 10% of the volume of the pores still remains filled with CO2. To improve EGS characterization, comparisons can be made of active seismic methods carried out before and after (time lapse mode) CO2 injection into the fracture or fault. We find that across the CO2 saturation range, C11 (the normal stiffness in the horizontal direction perpendicular to the fracture plane) varies between maximum and minimum values by about 15%. It reaches a maximum at around 6% gas saturation, decreasing exponentially to a minimum at higher saturations. Our results suggest that CO2 injection can be effectively used to infiltrate fault and fracture zones reaching about optimal saturation values in order to enhance seismic imaging at EGS sites.

Published
2017

46. Search for long-lived heavy charged particles using a ring imaging Cherenkov technique at LHCb

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreotti, M., Andrews, J. E., Appleby, R. B., Gutierrez, O. Aquines, Archilli, F., d'Argent, P., Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Baalouch, M., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Bel, L. J., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Benton, J., Berezhnoy, A., Bernet, R., Bertolin, A., Bettler, M. -O., van Beuzekom, M., Bien, A., Bifani, S., Bird, T., Birnkraut, A., Bizzeti, A., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Borsato, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Brett, D., Britsch, M., Britton, T., Brodzicka, J., Brook, N. H., Bursche, A., Buytaert, J., Cadeddu, S., Calabrese, R., Calvi, M., Gomez, M. Calvo, Campana, P., Perez, D. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Mohr, R. Casanova, Casse, G., Cassina, L., Garcia, L. Castillo, Cattaneo, M., Cauet, Ch., Cavallero, G., Cenci, R., Charles, M., Charpentier, Ph., Chefdeville, M., Chen, S., Cheung, S. -F., Chiapolini, N., Chrzaszcz, M., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collazuol, G., Collins, P., Comerma-Montells, A., Contu, A., Cook, A., Coombes, M., Coquereau, S., Corti, G., Corvo, M., Counts, I., Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Cunliffe, S., Currie, R., D'Ambrosio, C., Dalseno, J., David, P. N. Y., Davis, A., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Silva, W., De Simone, P., Dean, C. -T., Decamp, D., Deckenhoff, M., Del Buono, L., Déléage, N., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Ruscio, F., Dijkstra, H., Donleavy, S., Dordei, F., Dorigo, M., Suárez, A. Dosil, Dossett, D., Dovbnya, A., Dreimanis, K., Dujany, G., Dupertuis, F., Durante, P., Dzhelyadin, R., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Rifai, I. El, Elsasser, Ch., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Färber, C., Farinelli, C., Farley, N., Farry, S., Fay, R., Ferguson, D., Albor, V. Fernandez, Ferrari, F., Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fiore, M., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fol, P., Fontana, M., Fontanelli, F., Forty, R., Francisco, O., Frank, M., Frei, C., Frosini, M., Fu, J., Furfaro, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Pardiñas, J. García, Garofoli, J., Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gauld, R., Gavardi, L., Gazzoni, G., Geraci, A., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianelle, A., Gianì, S., Gibson, V., Giubega, L., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gotti, C., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greening, E., Gregson, S., Griffith, P., Grillo, L., Grünberg, O., Gui, B., Gushchin, E., Guz, Yu., Gys, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hall, S., Hamilton, B., Hampson, T., Han, X., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, J., He, J., Head, T., Heijne, V., Hennessy, K., Henrard, P., Henry, L., Morata, J. A. Hernando, van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hoballah, M., Hombach, C., Hulsbergen, W., Humair, T., Hussain, N., Hutchcroft, D., Hynds, D., Idzik, M., Ilten, P., Jacobsson, R., Jaeger, A., Jalocha, J., Jans, E., Jawahery, A., Jing, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Kanso, W., Karacson, M., Karbach, T. M., Karodia, S., Kelsey, M., Kenyon, I. R., Kenzie, M., Ketel, T., Khanji, B., Khurewathanakul, C., Klaver, S., Klimaszewski, K., Kochebina, O., Kolpin, M., Komarov, I., Koopman, R. F., Koppenburg, P., Kravchuk, L., Kreplin, K., Kreps, M., Krocker, G., Krokovny, P., Kruse, F., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kurek, K., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, D., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Langhans, B., Latham, T., Lazzeroni, C., Gac, R. Le, van Leerdam, J., Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Leroy, O., Lesiak, T., Leverington, B., Li, Y., Likhomanenko, T., Liles, M., Lindner, R., Linn, C., Lionetto, F., Liu, B., Lohn, S., Longstaff, I., Lopes, J. H., Lucchesi, D., Luo, H., Lupato, A., Luppi, E., Lupton, O., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Malde, S., Malinin, A., Manca, G., Mancinelli, G., Manning, P., Mapelli, A., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marino, P., Märki, R., Marks, J., Martellotti, G., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Tostes, D. Martins, Massafferri, A., Matev, R., Mathe, Z., Matteuzzi, C., Mauri, A., Maurin, B., Mazurov, A., McCann, M., McCarthy, J., McNab, A., McNulty, R., McSkelly, B., Meadows, B., Meier, F., Meissner, M., Merk, M., Milanes, D. A., Minard, M. -N., Mitzel, D. S., Rodriguez, J. Molina, Monteil, S., Morandin, M., Morawski, P., Mordà, A., Morello, M. J., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Müller, J., Müller, K., Müller, V., Mussini, M., Muster, B., Naik, P., Nakada, T., Nandakumar, R., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, A. D., Nguyen, T. D., Nguyen-Mau, C., Niess, V., Niet, R., Nikitin, N., Nikodem, T., Novoselov, A., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Okhrimenko, O., Oldeman, R., Onderwater, C. J. G., Rodrigues, B. Osorio, Goicochea, J. M. Otalora, Otto, A., Owen, P., Oyanguren, A., Palano, A., Palombo, F., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parkes, C., Passaleva, G., Patel, G. D., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Olloqui, E. Picatoste, Pietrzyk, B., Pilař, T., Pinci, D., Pistone, A., Playfer, S., Casasus, M. Plo, Poikela, T., Polci, F., Poluektov, A., Polyakov, I., Polycarpo, E., Popov, A., Popov, D., Popovici, B., Potterat, C., Price, E., Price, J. D., Prisciandaro, J., Pritchard, A., Prouve, C., Pugatch, V., Navarro, A. Puig, Punzi, G., Qian, W., Quagliani, R., Rachwal, B., Rademacker, J. H., Rakotomiaramanana, B., Rama, M., Rangel, M. S., Raniuk, I., Rauschmayr, N., Raven, G., Redi, F., Reichert, S., Reid, M. M., Reis, A. C. dos, Ricciardi, S., Richards, S., Rihl, M., Rinnert, K., Molina, V. Rives, Robbe, P., Rodrigues, A. B., Rodrigues, E., Perez, P. Rodriguez, Roiser, S., Romanovsky, V., Vidal, A. Romero, Rotondo, M., Rouvinet, J., Ruf, T., Ruiz, H., Valls, P. Ruiz, Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Guimaraes, V. Salustino, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santovetti, E., Sarti, A., Satriano, C., Satta, A., Saunders, D. M., Savrina, D., Schiller, M., Schindler, H., Schlupp, M., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schune, M. -H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepp, I., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shapoval, I., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shires, A., Coutinho, R. Silva, Simi, G., Sirendi, M., Skidmore, N., Skillicorn, I., Skwarnicki, T., Smith, E., Smith, J., Smith, M., Snoek, H., Sokoloff, M. D., Soler, F. J. P., Soomro, F., Souza, D., De Paula, B. Souza, Spaan, B., Spradlin, P., Sridharan, S., Stagni, F., Stahl, M., Stahl, S., Steinkamp, O., Stenyakin, O., Sterpka, F., Stevenson, S., Stoica, S., Stone, S., Storaci, B., Stracka, S., Straticiuc, M., Straumann, U., Stroili, R., Sun, L., Sutcliffe, W., Swientek, K., Swientek, S., Syropoulos, V., Szczekowski, M., Szczypka, P., Szumlak, T., T'Jampens, S., Tekampe, T., Teklishyn, M., Tellarini, G., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Todd, J., Tolk, S., Tomassetti, L., Tonelli, D., Topp-Joergensen, S., Torr, N., Tournefier, E., Tourneur, S., Trabelsi, K., Tran, M. T., Tresch, M., Trisovic, A., Tsaregorodtsev, A., Tsopelas, P., Tuning, N., Garcia, M. Ubeda, Ukleja, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagnoni, V., Valenti, G., Vallier, A., Gomez, R. Vazquez, Regueiro, P. Vazquez, Sierra, C. Vázquez, Vecchi, S., Velthuis, J. J., Veltri, M., Veneziano, G., Vesterinen, M., Viaud, B., Vieira, D., Diaz, M. Vieites, Vilasis-Cardona, X., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Waldi, R., Wallace, C., Wallace, R., Walsh, J., Wandernoth, S., Wang, J., Ward, D. R., Watson, N. K., Websdale, D., Weiden, A., Whitehead, M., Wiedner, D., Wilkinson, G., Wilkinson, M., Williams, M., Williams, M. P., Wilson, F. F., Wimberley, J., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wright, S., Wyllie, K., Xie, Y., Xu, Z., Yang, Z., Yuan, X., Yushchenko, O., Zangoli, M., Zavertyaev, M., Zhang, L., Zhang, Y., Zhelezov, A., Zhokhov, A., and Zhong, L.

Subjects
High Energy Physics - Experiment
Abstract

A search is performed for heavy long-lived charged particles using 3.0 fb$^{-1}$ of pp collisions collected at $\sqrt{s}$= 7 and 8 TeV with the LHCb detector. The search is mainly based on the response of the ring imaging Cherenkovdetectors to distinguish the heavy, slow-moving particles from muons. No evidence is found for the production of such long-lived states. The results are expressed as limits on the Drell-Yan production of pairs of long-lived particles, with both particles in the LHCb pseudorapidity acceptance, $1.8 < \eta < 4.9$. The mass-dependent cross-section upper limits are in the range 2-4 fb (at 95\% CL) for masses between 124 and 309 GeV/c$^2$.

Published
2015
Full Text
View/download PDF

47. Measurement of the forward $Z$ boson production cross-section in $pp$ collisions at $\sqrt{s}$ = 7 TeV

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreotti, M., Andrews, J. E., Appleby, R. B., Gutierrez, O. Aquines, Archilli, F., d'Argent, P., Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Baalouch, M., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Bel, L. J., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Benton, J., Berezhnoy, A., Bernet, R., Bertolin, A., Bettler, M. -O., van Beuzekom, M., Bien, A., Bifani, S., Bird, T., Birnkraut, A., Bizzeti, A., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Borsato, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Brett, D., Britsch, M., Britton, T., Brodzicka, J., Brook, N. H., Bursche, A., Buytaert, J., Cadeddu, S., Calabrese, R., Calvi, M., Gomez, M. Calvo, Campana, P., Perez, D. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Mohr, R. Casanova, Casse, G., Cassina, L., Garcia, L. Castillo, Cattaneo, M., Cauet, Ch., Cavallero, G., Cenci, R., Charles, M., Charpentier, Ph., Chefdeville, M., Chen, S., Cheung, S. -F., Chiapolini, N., Chrzaszcz, M., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collazuol, G., Collins, P., Comerma-Montells, A., Contu, A., Cook, A., Coombes, M., Coquereau, S., Corti, G., Corvo, M., Counts, I., Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Cunliffe, S., Currie, R., D'Ambrosio, C., Dalseno, J., David, P. N. Y., Davis, A., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Silva, W., De Simone, P., Dean, C. -T., Decamp, D., Deckenhoff, M., Del Buono, L., Déléage, N., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Ruscio, F., Dijkstra, H., Donleavy, S., Dordei, F., Dorigo, M., Suárez, A. Dosil, Dossett, D., Dovbnya, A., Dreimanis, K., Dujany, G., Dupertuis, F., Durante, P., Dzhelyadin, R., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Rifai, I. El, Elsasser, Ch., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Färber, C., Farinelli, C., Farley, N., Farry, S., Fay, R., Ferguson, D., Albor, V. Fernandez, Ferrari, F., Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fiore, M., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fol, P., Fontana, M., Fontanelli, F., Forty, R., Francisco, O., Frank, M., Frei, C., Frosini, M., Fu, J., Furfaro, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Pardiñas, J. García, Garofoli, J., Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gastaldi, U., Gauld, R., Gavardi, L., Gazzoni, G., Geraci, A., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianelle, A., Gianì, S., Gibson, V., Giubega, L., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gotti, C., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greening, E., Gregson, S., Griffith, P., Grillo, L., Grünberg, O., Gui, B., Gushchin, E., Guz, Yu., Gys, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hall, S., Hamilton, B., Hampson, T., Han, X., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, J., He, J., Head, T., Heijne, V., Hennessy, K., Henrard, P., Henry, L., Morata, J. A. Hernando, van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hoballah, M., Hombach, C., Hulsbergen, W., Humair, T., Hussain, N., Hutchcroft, D., Hynds, D., Idzik, M., Ilten, P., Jacobsson, R., Jaeger, A., Jalocha, J., Jans, E., Jawahery, A., Jing, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Kanso, W., Karacson, M., Karbach, T. M., Karodia, S., Kelsey, M., Kenyon, I. R., Kenzie, M., Ketel, T., Khanji, B., Khurewathanakul, C., Klaver, S., Klimaszewski, K., Kochebina, O., Kolpin, M., Komarov, I., Koopman, R. F., Koppenburg, P., Korolev, M., Kravchuk, L., Kreplin, K., Kreps, M., Krocker, G., Krokovny, P., Kruse, F., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kurek, K., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, D., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Langhans, B., Latham, T., Lazzeroni, C., Gac, R. Le, van Leerdam, J., Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Leroy, O., Lesiak, T., Leverington, B., Li, Y., Likhomanenko, T., Liles, M., Lindner, R., Linn, C., Lionetto, F., Liu, B., Lohn, S., Longstaff, I., Lopes, J. H., Lowdon, P., Lucchesi, D., Luo, H., Lupato, A., Luppi, E., Lupton, O., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Malde, S., Malinin, A., Manca, G., Mancinelli, G., Manning, P., Mapelli, A., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marino, P., Märki, R., Marks, J., Martellotti, G., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Tostes, D. Martins, Massafferri, A., Matev, R., Mathe, Z., Matteuzzi, C., Mauri, A., Maurin, B., Mazurov, A., McCann, M., McCarthy, J., McNab, A., McNulty, R., McSkelly, B., Meadows, B., Meier, F., Meissner, M., Merk, M., Milanes, D. A., Minard, M. -N., Mitzel, D. S., Rodriguez, J. Molina, Monteil, S., Morandin, M., Morawski, P., Mordà, A., Morello, M. J., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Müller, J., Müller, K., Müller, V., Mussini, M., Muster, B., Naik, P., Nakada, T., Nandakumar, R., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, A. D., Nguyen, T. D., Nguyen-Mau, C., Niess, V., Niet, R., Nikitin, N., Nikodem, T., Novoselov, A., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Okhrimenko, O., Oldeman, R., Onderwater, C. J. G., Rodrigues, B. Osorio, Goicochea, J. M. Otalora, Otto, A., Owen, P., Oyanguren, A., Palano, A., Palombo, F., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parkes, C., Passaleva, G., Patel, G. D., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petruzzo, M., Olloqui, E. Picatoste, Pietrzyk, B., Pilař, T., Pinci, D., Pistone, A., Playfer, S., Casasus, M. Plo, Poikela, T., Polci, F., Poluektov, A., Polyakov, I., Polycarpo, E., Popov, A., Popov, D., Popovici, B., Potterat, C., Price, E., Price, J. D., Prisciandaro, J., Pritchard, A., Prouve, C., Pugatch, V., Navarro, A. Puig, Punzi, G., Qian, W., Quagliani, R., Rachwal, B., Rademacker, J. H., Rakotomiaramanana, B., Rama, M., Rangel, M. S., Raniuk, I., Rauschmayr, N., Raven, G., Redi, F., Reichert, S., Reid, M. M., Reis, A. C. dos, Ricciardi, S., Richards, S., Rihl, M., Rinnert, K., Molina, V. Rives, Robbe, P., Rodrigues, A. B., Rodrigues, E., Perez, P. Rodriguez, Roiser, S., Romanovsky, V., Vidal, A. Romero, Rotondo, M., Rouvinet, J., Ruf, T., Ruiz, H., Valls, P. Ruiz, Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Guimaraes, V. Salustino, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santovetti, E., Sarti, A., Satriano, C., Satta, A., Saunders, D. M., Savrina, D., Schiller, M., Schindler, H., Schlupp, M., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schune, M. -H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepp, I., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shapoval, I., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shires, A., Coutinho, R. Silva, Simi, G., Sirendi, M., Skidmore, N., Skillicorn, I., Skwarnicki, T., Smith, E., Smith, J., Smith, M., Snoek, H., Sokoloff, M. D., Soler, F. J. P., Soomro, F., Souza, D., De Paula, B. Souza, Spaan, B., Spradlin, P., Sridharan, S., Stagni, F., Stahl, M., Stahl, S., Steinkamp, O., Stenyakin, O., Sterpka, F., Stevenson, S., Stoica, S., Stone, S., Storaci, B., Stracka, S., Straticiuc, M., Straumann, U., Stroili, R., Sun, L., Sutcliffe, W., Swientek, K., Swientek, S., Syropoulos, V., Szczekowski, M., Szczypka, P., Szumlak, T., T'Jampens, S., Tekampe, T., Teklishyn, M., Tellarini, G., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Todd, J., Tolk, S., Tomassetti, L., Tonelli, D., Topp-Joergensen, S., Torr, N., Tournefier, E., Tourneur, S., Trabelsi, K., Tran, M. T., Tresch, M., Trisovic, A., Tsaregorodtsev, A., Tsopelas, P., Tuning, N., Garcia, M. Ubeda, Ukleja, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagnoni, V., Valenti, G., Vallier, A., Gomez, R. Vazquez, Regueiro, P. Vazquez, Sierra, C. Vázquez, Vecchi, S., Velthuis, J. J., Veltri, M., Veneziano, G., Vesterinen, M., Viaud, B., Vieira, D., Diaz, M. Vieites, Vilasis-Cardona, X., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Waldi, R., Wallace, C., Wallace, R., Walsh, J., Wandernoth, S., Wang, J., Ward, D. R., Watson, N. K., Websdale, D., Weiden, A., Whitehead, M., Wiedner, D., Wilkinson, G., Wilkinson, M., Williams, M., Williams, M. P., Wilson, F. F., Wimberley, J., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wright, S., Wyllie, K., Xie, Y., Xu, Z., Yang, Z., Yuan, X., Yushchenko, O., Zangoli, M., Zavertyaev, M., Zhang, L., Zhang, Y., Zhelezov, A., Zhokhov, A., and Zhong, L.

Subjects
High Energy Physics - Experiment
Abstract

A measurement of the production cross-section for $Z$ bosons that decay to muons is presented. The data were recorded by the LHCb detector during $pp$ collisions at a centre-of-mass energy of 7 TeV, and correspond to an integrated luminosity of 1.0 fb$^{-1}$. The cross-section is measured for muons in the pseudorapidity range $2.0 < \eta < 4.5$ with transverse momenta $p_{T} > 20$ GeV/c. The dimuon mass is restricted to $60 < M_{\mu^{+}\mu^{-}} < 120$ GeV/c$^{2}$. The measured cross-section is $$\sigma_{Z\rightarrow\mu^{+}\mu^{-}} = (76.0 \pm 0.3 \pm 0.5 \pm 1.0 \pm 1.3) \, \text{pb}$$ where the uncertainties are due to the sample size, systematic effects, the beam energy and the luminosity. This result is in good agreement with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. The cross-section is also measured differentially as a function of kinematic variables of the $Z$ boson. Ratios of the production cross-sections of electroweak bosons are presented using updated LHCb measurements of $W$ boson production. A precise test of the Standard Model is provided by the measurement of the ratio $$\frac{\sigma_{W^{+}\rightarrow\mu^{+}\nu_{\mu}} + \sigma_{W^{-}\rightarrow\mu^{-}\bar{\nu}_{\mu}}}{\sigma_{Z\rightarrow\mu^{+}\mu^{-}}} = 20.63\pm0.09\pm0.12\pm0.05,$$ where the uncertainty due to luminosity cancels., Comment: New version in line with version accepted by JHEP. Small changes to the layout of figures. Results unchanged

Published
2015
Full Text
View/download PDF

48. Dalitz plot analysis of $B^0 \to \overline{D}^0 \pi^+\pi^-$ decays

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreassen, R., Andreotti, M., Andrews, J. E., Appleby, R. B., Gutierrez, O. Aquines, Archilli, F., d'Argent, P., Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Baalouch, M., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Bel, L. J., Belogurov, S., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Benton, J., Berezhnoy, A., Bernet, R., Bertolin, A., Bettler, M. -O., van Beuzekom, M., Bien, A., Bifani, S., Bird, T., Birnkraut, A., Bizzeti, A., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Borsato, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Brett, D., Britsch, M., Britton, T., Brodzicka, J., Brook, N. H., Bursche, A., Buytaert, J., Cadeddu, S., Calabrese, R., Calvi, M., Gomez, M. Calvo, Campana, P., Perez, D. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Akiba, K. Carvalho, Mohr, R. Casanova, Casse, G., Cassina, L., Garcia, L. Castillo, Cattaneo, M., Cauet, Ch., Cavallero, G., Cenci, R., Charles, M., Charpentier, Ph., Chefdeville, M., Chen, S., Cheung, S. -F., Chiapolini, N., Chrzaszcz, M., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collazuol, G., Collins, P., Comerma-Montells, A., Contu, A., Cook, A., Coombes, M., Coquereau, S., Corti, G., Corvo, M., Counts, I., Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Torres, M. Cruz, Cunliffe, S., Currie, R., D'Ambrosio, C., Dalseno, J., David, P., David, P. N. Y., Davis, A., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Silva, W., De Simone, P., Dean, C. -T., Decamp, D., Deckenhoff, M., Del Buono, L., Déléage, N., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Ruscio, F., Dijkstra, H., Donleavy, S., Dordei, F., Dorigo, M., Suárez, A. Dosil, Dossett, D., Dovbnya, A., Dreimanis, K., Dujany, G., Dupertuis, F., Durante, P., Dzhelyadin, R., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Rifai, I. El, Elsasser, Ch., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Färber, C., Farinelli, C., Farley, N., Farry, S., Fay, R., Ferguson, D., Albor, V. Fernandez, Ferrari, F., Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fiore, M., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fol, P., Fontana, M., Fontanelli, F., Forty, R., Francisco, O., Frank, M., Frei, C., Frosini, M., Fu, J., Furfaro, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Pardiñas, J. García, Garofoli, J., Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gastaldi, U., Gauld, R., Gavardi, L., Gazzoni, G., Geraci, A., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianelle, A., Gianì, S., Gibson, V., Giubega, L., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gotti, C., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greening, E., Gregson, S., Griffith, P., Grillo, L., Grünberg, O., Gui, B., Gushchin, E., Guz, Yu., Gys, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hall, S., Hamilton, B., Hampson, T., Han, X., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, J., He, J., Head, T., Heijne, V., Hennessy, K., Henrard, P., Henry, L., Morata, J. A. Hernando, van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hoballah, M., Hombach, C., Hulsbergen, W., Humair, T., Hussain, N., Hutchcroft, D., Hynds, D., Idzik, M., Ilten, P., Jacobsson, R., Jaeger, A., Jalocha, J., Jans, E., Jawahery, A., Jing, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Kanso, W., Karacson, M., Karbach, T. M., Karodia, S., Kelsey, M., Kenyon, I. R., Kenzie, M., Ketel, T., Khanji, B., Khurewathanakul, C., Klaver, S., Klimaszewski, K., Kochebina, O., Kolpin, M., Komarov, I., Koopman, R. F., Koppenburg, P., Korolev, M., Kravchuk, L., Kreplin, K., Kreps, M., Krocker, G., Krokovny, P., Kruse, F., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kurek, K., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, D., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Langhans, B., Latham, T., Lazzeroni, C., Gac, R. Le, van Leerdam, J., Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Leroy, O., Lesiak, T., Leverington, B., Li, Y., Likhomanenko, T., Liles, M., Lindner, R., Linn, C., Lionetto, F., Liu, B., Lohn, S., Longstaff, I., Lopes, J. H., Lucchesi, D., Luo, H., Lupato, A., Luppi, E., Lupton, O., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Malde, S., Malinin, A., Manca, G., Mancinelli, G., Manning, P., Mapelli, A., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marino, P., Märki, R., Marks, J., Martellotti, G., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Tostes, D. Martins, Massafferri, A., Matev, R., Mathe, Z., Matteuzzi, C., Mauri, A., Maurin, B., Mazurov, A., McCann, M., McCarthy, J., McNab, A., McNulty, R., McSkelly, B., Meadows, B., Meier, F., Meissner, M., Merk, M., Milanes, D. A., Minard, M. -N., Mitzel, D. S., Rodriguez, J. Molina, Monteil, S., Morandin, M., Morawski, P., Mordà, A., Morello, M. J., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Müller, J., Müller, K., Müller, V., Mussini, M., Muster, B., Naik, P., Nakada, T., Nandakumar, R., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, A. D., Nguyen, T. D., Nguyen-Mau, C., Nicol, M., Niess, V., Niet, R., Nikitin, N., Nikodem, T., Novoselov, A., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Okhrimenko, O., Oldeman, R., Onderwater, C. J. G., Rodrigues, B. Osorio, Goicochea, J. M. Otalora, Otto, A., Owen, P., Oyanguren, A., Pal, B. K., Palano, A., Palombo, F., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petruzzo, M., Olloqui, E. Picatoste, Pietrzyk, B., Pilař, T., Pinci, D., Pistone, A., Playfer, S., Casasus, M. Plo, Polci, F., Poluektov, A., Polyakov, I., Polycarpo, E., Popov, A., Popov, D., Popovici, B., Potterat, C., Price, E., Price, J. D., Prisciandaro, J., Pritchard, A., Prouve, C., Pugatch, V., Navarro, A. Puig, Punzi, G., Qian, W., Quagliani, R., Rachwal, B., Rademacker, J. H., Rakotomiaramanana, B., Rama, M., Rangel, M. S., Raniuk, I., Rauschmayr, N., Raven, G., Redi, F., Reichert, S., Reid, M. M., Reis, A. C. dos, Ricciardi, S., Richards, S., Rihl, M., Rinnert, K., Molina, V. Rives, Robbe, P., Rodrigues, A. B., Rodrigues, E., Perez, P. Rodriguez, Roiser, S., Romanovsky, V., Vidal, A. Romero, Rotondo, M., Rouvinet, J., Ruf, T., Ruiz, H., Valls, P. Ruiz, Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Guimaraes, V. Salustino, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santovetti, E., Sarti, A., Satriano, C., Satta, A., Saunders, D. M., Savrina, D., Schiller, M., Schindler, H., Schlupp, M., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schune, M. -H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepp, I., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shapoval, I., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shires, A., Coutinho, R. Silva, Simi, G., Sirendi, M., Skidmore, N., Skillicorn, I., Skwarnicki, T., Smith, E., Smith, J., Smith, M., Snoek, H., Sokoloff, M. D., Soler, F. J. P., Soomro, F., Souza, D., De Paula, B. Souza, Spaan, B., Spradlin, P., Sridharan, S., Stagni, F., Stahl, M., Stahl, S., Steinkamp, O., Stenyakin, O., Sterpka, F., Stevenson, S., Stoica, S., Stone, S., Storaci, B., Stracka, S., Straticiuc, M., Straumann, U., Stroili, R., Sun, L., Sutcliffe, W., Swientek, K., Swientek, S., Syropoulos, V., Szczekowski, M., Szczypka, P., Szumlak, T., T'Jampens, S., Tekampe, T., Teklishyn, M., Tellarini, G., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Todd, J., Tolk, S., Tomassetti, L., Tonelli, D., Topp-Joergensen, S., Torr, N., Tournefier, E., Tourneur, S., Trabelsi, K., Tran, M. T., Tresch, M., Trisovic, A., Tsaregorodtsev, A., Tsopelas, P., Tuning, N., Garcia, M. Ubeda, Ukleja, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagnoni, V., Valenti, G., Vallier, A., Gomez, R. Vazquez, Regueiro, P. Vazquez, Sierra, C. Vázquez, Vecchi, S., Velthuis, J. J., Veltri, M., Veneziano, G., Vesterinen, M., Viaud, B., Vieira, D., Diaz, M. Vieites, Vilasis-Cardona, X., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Waldi, R., Wallace, C., Wallace, R., Walsh, J., Wandernoth, S., Wang, J., Ward, D. R., Watson, N. K., Websdale, D., Whitehead, M., Wiedner, D., Wilkinson, G., Wilkinson, M., Williams, M. P., Williams, M., Wilson, F. F., Wimberley, J., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wright, S., Wyllie, K., Xie, Y., Xing, Z., Xu, Z., Yang, Z., Yuan, X., Yushchenko, O., Zangoli, M., Zavertyaev, M., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zhokhov, A., and Zhong, L.

Subjects
High Energy Physics - Experiment
Abstract

The resonant substructures of $B^0 \to \overline{D}^0 \pi^+\pi^-$ decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb$^{-1}$ of $pp$ collisions collected by the LHCb detector is used. The branching fraction of the $B^0 \to \overline{D}^0 \pi^+\pi^-$ decay in the region $m(\overline{D}^0\pi^{\pm})>2.1$ GeV$/c^2$ is measured to be $(8.46 \pm 0.14 \pm 0.29 \pm 0.40) \times 10^{-4}$, where the first uncertainty is statistical, the second is systematic and the last arises from the normalisation channel $B^0 \to D^*(2010)^-\pi^+$. The $\pi^+\pi^-$ S-wave components are modelled with the Isobar and K-matrix formalisms. Results of the Dalitz plot analyses using both models are presented. A resonant structure at $m(\overline{D}^0\pi^-) \approx 2.8$ GeV$/c^{2}$ is confirmed and its spin-parity is determined for the first time as $J^P = 3^-$. The branching fraction, mass and width of this structure are determined together with those of the $D^*_0(2400)^-$ and $D^*_2(2460)^-$ resonances. The branching fractions of other $B^0 \to \overline{D}^0 h^0$ decay components with $h^0 \to \pi^+\pi^-$ are also reported. Many of these branching fraction measurements are the most precise to date. The first observation of the decays $B^0 \to \overline{D}^0 f_0(500)$, $B^0 \to \overline{D}^0 f_0(980)$, $B^0 \to \overline{D}^0 \rho(1450)$, $B^0 \to D_3^*(2760)^- \pi^+$ and the first evidence of $B^0 \to \overline{D}^0 f_0(2020)$ are presented., Comment: 64 pages, 17 figures

Published
2015
Full Text
View/download PDF

49. Quantum numbers of the $X(3872)$ state and orbital angular momentum in its $\rho^0 J\psi$ decay

Author

LHCb collaboration, Aaij, R., Beteta, C. Abellan, Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Anderson, J., Andreassen, R., Appleby, R. B., Gutierrez, O. Aquines, Archilli, F., Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Bachmann, S., Back, J. J., Baesso, C., Balagura, V., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Bauer, Th., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Belogurov, S., Belous, K., Belyaev, I., Ben-Haim, E., Benayoun, M., Bencivenni, G., Benson, S., Benton, J., Berezhnoy, A., Bernet, R., Bettler, M. -O., van Beuzekom, M., Bien, A., Bifani, S., Bird, T., Bizzeti, A., Bjørnstad, P. M., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Bowcock, T. J. V., Bowen, E., Bozzi, C., Brambach, T., Brand, J. van den, Bressieux, J., Brett, D., Britsch, M., Britton, T., Brook, N. H., Brown, H., Burducea, I., Bursche, A., Busetto, G., Buytaert, J., Cadeddu, S., Callot, O., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carranza-Mejia, H., Carson, L., Akiba, K. Carvalho, Casse, G., Cattaneo, M., Cauet, Ch., Charles, M., Charpentier, Ph., Chen, P., Chiapolini, N., Chrzaszcz, M., Ciba, K., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Cogneras, E., Collins, P., Comerma-Montells, A., Contu, A., Cook, A., Coombes, M., Coquereau, S., Corti, G., Couturier, B., Cowan, G. A., Craik, D., Cunliffe, S., Currie, R., D'Ambrosio, C., David, P., David, P. N. Y., De Bonis, I., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., Campos, M. De Oyanguren, De Paula, L., De Silva, W., De Simone, P., Decamp, D., Deckenhoff, M., Del Buono, L., Derkach, D., Deschamps, O., Dettori, F., Di Canto, A., Dijkstra, H., Dogaru, M., Donleavy, S., Dordei, F., Suárez, A. Dosil, Dossett, D., Dovbnya, A., Dupertuis, F., Dzhelyadin, R., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., van Eijk, D., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Rifai, I. El, Elsasser, Ch., Elsby, D., Falabella, A., Färber, C., Fardell, G., Farinelli, C., Farry, S., Fave, V., Ferguson, D., Albor, V. Fernandez, Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fitzpatrick, C., Fontana, M., Fontanelli, F., Forty, R., Francisco, O., Frank, M., Frei, C., Frosini, M., Furcas, S., Furfaro, E., Torreira, A. Gallas, Galli, D., Gandelman, M., Gandini, P., Gao, Y., Garofoli, J., Garosi, P., Tico, J. Garra, Garrido, L., Gaspar, C., Gauld, R., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gibson, V., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gordon, H., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graziani, G., Grecu, A., Greening, E., Gregson, S., Grünberg, O., Gui, B., Gushchin, E., Guz, Yu., Gys, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hall, S., Hampson, T., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, J., Hartmann, T., He, J., Heijne, V., Hennessy, K., Henrard, P., Morata, J. A. Hernando, van Herwijnen, E., Hicks, E., Hill, D., Hoballah, M., Hombach, C., Hopchev, P., Hulsbergen, W., Hunt, P., Huse, T., Hussain, N., Hutchcroft, D., Hynds, D., Iakovenko, V., Idzik, M., Ilten, P., Jacobsson, R., Jaeger, A., Jans, E., Jaton, P., Jing, F., John, M., Johnson, D., Jones, C. R., Jost, B., Kaballo, M., Kandybei, S., Karacson, M., Karbach, T. M., Kenyon, I. R., Kerzel, U., Ketel, T., Keune, A., Khanji, B., Kochebina, O., Komarov, I., Koopman, R. F., Koppenburg, P., Korolev, M., Kozlinskiy, A., Kravchuk, L., Kreplin, K., Kreps, M., Krocker, G., Krokovny, P., Kruse, F., Kucharczyk, M., Kudryavtsev, V., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, D., Lambert, R. W., Lanciotti, E., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R. Le, van Leerdam, J., Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Leo, S., Leroy, O., Leverington, B., Li, Y., Gioi, L. Li, Liles, M., Lindner, R., Linn, C., Liu, B., Liu, G., von Loeben, J., Lohn, S., Lopes, J. H., Asamar, E. Lopez, Lopez-March, N., Lu, H., Lucchesi, D., Luisier, J., Luo, H., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Malde, S., Manca, G., Mancinelli, G., Marconi, U., Märki, R., Marks, J., Martellotti, G., Martens, A., Martin, L., Sánchez, A. Martín, Martinelli, M., Santos, D. Martinez, Tostes, D. Martins, Massafferri, A., Matev, R., Mathe, Z., Matteuzzi, C., Maurice, E., Mazurov, A., McCarthy, J., McNulty, R., Mcnab, A., Meadows, B., Meier, F., Meissner, M., Merk, M., Milanes, D. A., Minard, M. -N., Rodriguez, J. Molina, Monteil, S., Moran, D., Morawski, P., Morello, M. J., Mountain, R., Mous, I., Muheim, F., Müller, K., Muresan, R., Muryn, B., Muster, B., Naik, P., Nakada, T., Nandakumar, R., Nasteva, I., Needham, M., Neufeld, N., Nguyen, A. D., Nguyen, T. D., Nguyen-Mau, C., Nicol, M., Niess, V., Niet, R., Nikitin, N., Nikodem, T., Nomerotski, A., Novoselov, A., Oblakowska-Mucha, A., Obraztsov, V., Oggero, S., Ogilvy, S., Okhrimenko, O., Oldeman, R., Orlandea, M., Goicochea, J. M. Otalora, Owen, P., Pal, B. K., Palano, A., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Patrick, G. N., Patrignani, C., Pavel-Nicorescu, C., Alvarez, A. Pazos, Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perego, D. L., Trigo, E. Perez, Yzquierdo, A. Pérez-Calero, Perret, P., Perrin-Terrin, M., Pessina, G., Petridis, K., Petrolini, A., Phan, A., Olloqui, E. Picatoste, Pietrzyk, B., Pilař, T., Pinci, D., Playfer, S., Casasus, M. Plo, Polci, F., Polok, G., Poluektov, A., Polycarpo, E., Popov, D., Popovici, B., Potterat, C., Powell, A., Prisciandaro, J., Pugatch, V., Navarro, A. Puig, Punzi, G., Qian, W., Rademacker, J. H., Rakotomiaramanana, B., Rangel, M. S., Raniuk, I., Rauschmayr, N., Raven, G., Redford, S., Reid, M. M., Reis, A. C. dos, Ricciardi, S., Richards, A., Rinnert, K., Molina, V. Rives, Romero, D. A. Roa, Robbe, P., Rodrigues, E., Perez, P. Rodriguez, Roiser, S., Romanovsky, V., Vidal, A. Romero, Rouvinet, J., Ruf, T., Ruffini, F., Ruiz, H., Valls, P. Ruiz, Sabatino, G., Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Salzmann, C., Sedes, B. Sanmartin, Sannino, M., Santacesaria, R., Rios, C. Santamarina, Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Satta, A., Savrie, M., Savrina, D., Schaack, P., Schiller, M., Schindler, H., Schlupp, M., Schmelling, M., Schmidt, B., Schneider, O., Schopper, A., Schune, M. -H., Schwemmer, R., Sciascia, B., Sciubba, A., Seco, M., Semennikov, A., Senderowska, K., Sepp, I., Serra, N., Serrano, J., Seyfert, P., Shapkin, M., Shapoval, I., Shatalov, P., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, O., Shevchenko, V., Shires, A., Coutinho, R. Silva, Skwarnicki, T., Smith, N. A., Smith, E., Smith, M., Sokoloff, M. D., Soler, F. J. P., Soomro, F., Souza, D., De Paula, B. Souza, Spaan, B., Sparkes, A., Spradlin, P., Stagni, F., Stahl, S., Steinkamp, O., Stoica, S., Stone, S., Storaci, B., Straticiuc, M., Straumann, U., Subbiah, V. K., Swientek, S., Syropoulos, V., Szczekowski, M., Szczypka, P., Szumlak, T., T'Jampens, S., Teklishyn, M., Teodorescu, E., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Tolk, S., Tonelli, D., Topp-Joergensen, S., Torr, N., Tournefier, E., Tourneur, S., Tran, M. T., Tresch, M., Tsaregorodtsev, A., Tsopelas, P., Tuning, N., Garcia, M. Ubeda, Ukleja, A., Urner, D., Uwer, U., Vagnoni, V., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., Velthuis, J. J., Veltri, M., Veneziano, G., Vesterinen, M., Viaud, B., Vieira, D., Vilasis-Cardona, X., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, V., Voß, C., Voss, H., Waldi, R., Wallace, R., Wandernoth, S., Wang, J., Ward, D. R., Watson, N. K., Webber, A. D., Websdale, D., Whitehead, M., Wicht, J., Wiechczynski, J., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M. P., Williams, M., Wilson, F. F., Wishahi, J., Witek, M., Wotton, S. A., Wright, S., Wu, S., Wyllie, K., Xie, Y., Xing, F., Xing, Z., Yang, Z., Young, R., Yuan, X., Yushchenko, O., Zangoli, M., Zavertyaev, M., Zhang, F., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zhokhov, A., Zhong, L., and Zvyagin, A.

Subjects
High Energy Physics - Experiment
Abstract

Angular correlations in $B^+\to X(3872) K^+$ decays, with $X(3872)\to \rho^0 J/\psi$, $\rho^0\to\pi^+\pi^-$ and $J/\psi \to\mu^+\mu^-$, are used to measure orbital angular momentum contributions and to determine the $J^{PC}$ value of the $X(3872)$ meson. The data correspond to an integrated luminosity of 3.0 fb$^{-1}$ of proton-proton collisions collected with the LHCb detector. This determination, for the first time performed without assuming a value for the orbital angular momentum, confirms the quantum numbers to be $J^{PC}=1^{++}$. The $X(3872)$ is found to decay predominantly through S wave and an upper limit of $4\%$ at $95\%$ C.L. is set on the fraction of D wave., Comment: 16 pages, 4 figures

Published
2015
Full Text
View/download PDF

50. Observation of the $B^0_s\to\eta'\eta'$ decay

Author

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreassen, R., Andreotti, M., Andrews, J. E., Appleby, R. B., Gutierrez, O. Aquines, Archilli, F., Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Baalouch, M., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Bel, L. J., Belogurov, S., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Benton, J., Berezhnoy, A., Bernet, R., Bertolin, A., Bettler, M. -O., van Beuzekom, M., Bien, A., Bifani, S., Bird, T., Bizzeti, A., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Borsato, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Brett, D., Britsch, M., Britton, T., Brodzicka, J., Brook, N. H., Bursche, A., Buytaert, J., Cadeddu, S., Calabrese, R., Calvi, M., Gomez, M. Calvo, Campana, P., Perez, D. Campora, Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carson, L., Akiba, K. Carvalho, Mohr, R. Casanova, Casse, G., Cassina, L., Garcia, L. Castillo, Cattaneo, M., Cauet, Ch., Cavallero, G., Cenci, R., Charles, M., Charpentier, Ph., Chefdeville, M., Chen, S., Cheung, S. -F., Chiapolini, N., Chrzaszcz, M., Vidal, X. Cid, Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collazuol, G., Collins, P., Comerma-Montells, A., Contu, A., Cook, A., Coombes, M., Coquereau, S., Corti, G., Corvo, M., Counts, I., Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A. C., Torres, M. Cruz, Cunliffe, S., Currie, R., D'Ambrosio, C., Dalseno, J., David, P., David, P. N. Y., Davis, A., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Silva, W., De Simone, P., Dean, C. -T., Decamp, D., Deckenhoff, M., Del Buono, L., Déléage, N., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Dijkstra, H., Donleavy, S., Dordei, F., Dorigo, M., Suárez, A. Dosil, Dossett, D., Dovbnya, A., Dreimanis, K., Dujany, G., Dupertuis, F., Durante, P., Dzhelyadin, R., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Rifai, I. El, Elsasser, Ch., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Färber, C., Farinelli, C., Farley, N., Farry, S., Fay, R., Ferguson, D., Albor, V. Fernandez, Ferrari, F., Rodrigues, F. Ferreira, Ferro-Luzzi, M., Filippov, S., Fiore, M., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fol, P., Fontana, M., Fontanelli, F., Forty, R., Francisco, O., Frank, M., Frei, C., Frosini, M., Fu, J., Furfaro, E., Torreira, A. Gallas, Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Pardiñas, J. García, Garofoli, J., Tico, J. Garra, Garrido, L., Gascon, D., Gaspar, C., Gastaldi, U., Gauld, R., Gavardi, L., Gazzoni, G., Geraci, A., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, Ph., Gianelle, A., Gianì, S., Gibson, V., Giubega, L., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gotti, C., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greening, E., Gregson, S., Griffith, P., Grillo, L., Grünberg, O., Gui, B., Gushchin, E., Guz, Yu., Gys, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hall, S., Hamilton, B., Hampson, T., Han, X., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, J., He, J., Head, T., Heijne, V., Hennessy, K., Henrard, P., Henry, L., Morata, J. A. Hernando, van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hoballah, M., Hombach, C., Hulsbergen, W., Hussain, N., Hutchcroft, D., Hynds, D., Idzik, M., Ilten, P., Jacobsson, R., Jaeger, A., Jalocha, J., Jans, E., Jawahery, A., Jing, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Kanso, W., Karacson, M., Karbach, T. M., Karodia, S., Kelsey, M., Kenyon, I. R., Kenzie, M., Ketel, T., Khanji, B., Khurewathanakul, C., Klaver, S., Klimaszewski, K., Kochebina, O., Kolpin, M., Komarov, I., Koopman, R. F., Koppenburg, P., Korolev, M., Kravchuk, L., Kreplin, K., Kreps, M., Krocker, G., Krokovny, P., Kruse, F., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kurek, K., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, D., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Langhans, B., Latham, T., Lazzeroni, C., Gac, R. Le, van Leerdam, J., Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Leroy, O., Lesiak, T., Leverington, B., Li, Y., Likhomanenko, T., Liles, M., Lindner, R., Linn, C., Lionetto, F., Liu, B., Lohn, S., Longstaff, I., Lopes, J. H., Lowdon, P., Lucchesi, D., Luo, H., Lupato, A., Luppi, E., Lupton, O., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Malde, S., Malinin, A., Manca, G., Mancinelli, G., Manning, P., Mapelli, A., Maratas, J., Marchand, J. F., Marconi, U., Benito, C. Marin, Marino, P., Märki, R., Marks, J., Martellotti, G., Martinelli, M., Santos, D. Martinez, Vidal, F. Martinez, Tostes, D. Martins, Massafferri, A., Matev, R., Mathe, Z., Matteuzzi, C., Maurin, B., Mazurov, A., McCann, M., McCarthy, J., McNab, A., McNulty, R., McSkelly, B., Meadows, B., Meier, F., Meissner, M., Merk, M., Milanes, D. A., Minard, M. -N., Mitzel, D. S., Rodriguez, J. Molina, Monteil, S., Morandin, M., Morawski, P., Mordà, A., Morello, M. J., Moron, J., Morris, A. -B., Mountain, R., Muheim, F., Müller, K., Mussini, M., Muster, B., Naik, P., Nakada, T., Nandakumar, R., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, A. D., Nguyen, T. D., Nguyen-Mau, C., Nicol, M., Niess, V., Niet, R., Nikitin, N., Nikodem, T., Novoselov, A., O'Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Okhrimenko, O., Oldeman, R., Onderwater, C. J. G., Rodrigues, B. Osorio, Goicochea, J. M. Otalora, Otto, A., Owen, P., Oyanguren, A., Pal, B. K., Palano, A., Palombo, F., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Olloqui, E. Picatoste, Pietrzyk, B., Pilař, T., Pinci, D., Pistone, A., Playfer, S., Casasus, M. Plo, Polci, F., Poluektov, A., Polyakov, I., Polycarpo, E., Popov, A., Popov, D., Popovici, B., Potterat, C., Price, E., Price, J. D., Prisciandaro, J., Pritchard, A., Prouve, C., Pugatch, V., Navarro, A. Puig, Punzi, G., Qian, W., Quagliani, R., Rachwal, B., Rademacker, J. H., Rakotomiaramanana, B., Rama, M., Rangel, M. S., Raniuk, I., Rauschmayr, N., Raven, G., Redi, F., Reichert, S., Reid, M. M., Reis, A. C. dos, Ricciardi, S., Richards, S., Rihl, M., Rinnert, K., Molina, V. Rives, Robbe, P., Rodrigues, A. B., Rodrigues, E., Perez, P. Rodriguez, Roiser, S., Romanovsky, V., Vidal, A. Romero, Rotondo, M., Rouvinet, J., Ruf, T., Ruiz, H., Valls, P. Ruiz, Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Guimaraes, V. Salustino, Mayordomo, C. Sanchez, Sedes, B. Sanmartin, Santacesaria, R., Rios, C. Santamarina, Santovetti, E., Sarti, A., Satriano, C., Satta, A., Saunders, D. M., Savrina, D., Schiller, M., Schindler, H., Schlupp, M., Schmelling, M., Schmidt, B., Schneider, O., Schopper, A., Schune, M. -H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sepp, I., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shapoval, I., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shires, A., Coutinho, R. Silva, Simi, G., Sirendi, M., Skidmore, N., Skillicorn, I., Skwarnicki, T., Smith, N. A., Smith, E., Smith, J., Smith, M., Snoek, H., Sokoloff, M. D., Soler, F. J. P., Soomro, F., Souza, D., De Paula, B. Souza, Spaan, B., Spradlin, P., Sridharan, S., Stagni, F., Stahl, M., Stahl, S., Steinkamp, O., Stenyakin, O., Sterpka, F., Stevenson, S., Stoica, S., Stone, S., Storaci, B., Stracka, S., Straticiuc, M., Straumann, U., Stroili, R., Sun, L., Sutcliffe, W., Swientek, K., Swientek, S., Syropoulos, V., Szczekowski, M., Szczypka, P., Szumlak, T., T'Jampens, S., Teklishyn, M., Tellarini, G., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Todd, J., Tolk, S., Tomassetti, L., Tonelli, D., Topp-Joergensen, S., Torr, N., Tournefier, E., Tourneur, S., Trabelsi, K., Tran, M. T., Tresch, M., Trisovic, A., Tsaregorodtsev, A., Tsopelas, P., Tuning, N., Garcia, M. Ubeda, Ukleja, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagnoni, V., Valenti, G., Vallier, A., Gomez, R. Vazquez, Regueiro, P. Vazquez, Sierra, C. Vázquez, Vecchi, S., Velthuis, J. J., Veltri, M., Veneziano, G., Vesterinen, M., Barbosa, J. V. Viana, Viaud, B., Vieira, D., Diaz, M. Vieites, Vilasis-Cardona, X., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Waldi, R., Wallace, C., Wallace, R., Walsh, J., Wandernoth, S., Wang, J., Ward, D. R., Watson, N. K., Websdale, D., Whitehead, M., Wiedner, D., Wilkinson, G., Wilkinson, M., Williams, M. P., Williams, M., Wilson, F. F., Wimberley, J., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wright, S., Wyllie, K., Xie, Y., Xing, Z., Xu, Z., Yang, Z., Yuan, X., Yushchenko, O., Zangoli, M., Zavertyaev, M., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zhokhov, A., and Zhong, L.

Subjects
High Energy Physics - Experiment
Abstract

The first observation of the $B^0_s\to\eta'\eta'$ decay is reported. The study is based on a sample of proton-proton collisions corresponding to $3.0$ ${\rm fb^{-1}}$ of integrated luminosity collected with the LHCb detector. The significance of the signal is $6.4$ standard deviations. The branching fraction is measured to be $[3.31 \pm 0.64\,{\rm (stat)} \pm 0.28\,{\rm (syst)} \pm 0.12\,{\rm (norm)}]\times10^{-5}$, where the third uncertainty comes from the $B^{\pm}\to\eta' K^{\pm}$ branching fraction that is used as a normalisation. In addition, the charge asymmetries of $B^{\pm}\to\eta' K^{\pm}$ and $B^{\pm}\to\phi K^{\pm}$, which are control channels, are measured to be $(-0.2 \pm1.3)\%$ and $(+1.7\pm1.3)\%$, respectively. All results are consistent with theoretical expectations.

Published
2015
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results