著者

Akira MATSUI Yoshinobu INOUE Yo ASAI Akira YAMANOBE

出版者

Japanese Society of Equine Science

雑誌

Journal of Equine Science (ISSN:13403516)

巻号頁・発行日

vol.16, no.1, pp.19-26, 2005 (Released:2005-04-21)

参考文献数

21

被引用文献数

1 3

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Different geographic regions in which thoroughbred yearling horses are bred have different climates and different types of forage in pasture and hay. These factors are likely to influence the energy metabolism and growth rate of yearling horses. However, the effects of the characteristics of geographic regions on the digestible energy (DE) intake and growth rate of thoroughbred yearlings has yet to be clarified in detail. Here, we have examined the effect of the breeding region on growth performance of young horses, by comparing the DE intakes and growth rates of thoroughbred yearlings in Hidaka (Hokkaido) and Miyazaki (Southern Kyushu) in Japan. Eighteen male thoroughbred yearlings were divided equally into two groups, and bred either at the Hidaka training and research center (HYF) or the Miyazaki yearling farm (MYF). Measurements were conducted in September (summer) and in February (winter), and the mean ages of the yearlings during these two periods were 18 months and 23-24 months old, respectively. The apparent digestible energy intake was measured by a double-indicator method using Cr2O3 and lignin. There was no significant difference in the DE intakes between the yearling horses at the HYF and MYF in either season. The warm land of Southwest Japan has been considered to be unsuitable for growing forage containing sufficient nutrients to feed thoroughbreds, but no nutritional disadvantage of this forage was detected in the yearlings bred at the MYF. On the other hand, the heart girth (HG) and cannon circumference (CC) were found to be significantly smaller in yearlings at the HYF, compared to those at the MYF, in the winter evaluation (p<0.05). Significant positive correlations between the ADG and DE intake/100 kg body weight were seen in animals at the HYF in the summer and in those at the MYF in both seasons; however, such a correlation was not found in horses at the HYF in winter. The reason for the smaller HG and CC and the absence of a significant correlation between the ADG and DE intake/100 kg body weight in the yearlings at the HYF in winter is unclear. It could be attributable to growth delay due to exposure to cold temperatures, or lack of supplementation to compensate for the increased energy requirement due to excess energy metabolism in cold weather. Closer attention must, therefore, be paid to the energy supply and nutritional composition of feedstuffs fed to thoroughbred yearlings at farms in regions with cold ambient temperatures.

著者

秋岡 陽 Yo Akioka フェリス女学院大学 音楽学部 楽理学科(旧)(教員)

出版者

フェリス女学院大学

雑誌

フェリス女学院大学キリスト教音楽研究所論叢 (ISSN:13488600)

巻号頁・発行日

vol.1, pp.2-17, 2003-11

著者

Kiyoshi Kitano Kiyoshi Furuta Shinichiro Kanai Yo-ichi Takei

出版者

一般社団法人 日本内科学会

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

vol.55, no.5, pp.533-536, 2016 (Released:2016-03-01)

参考文献数

10

被引用文献数

2

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A 41-year-old nurse was referred to our hospital with a fever and disturbed consciousness. She tested positive for influenza antigen. CT and MRI findings revealed low density and intensity areas in the right occipital and lateral lobes with remarkable brain edema, which led to a diagnosis of influenza encephalopathy. Influenza A antibodies in the serum were below the detection limit despite the patient receiving previous vaccination three months earlier. A PCR analysis revealed that the influenza HA gene was classified into clade 3C.2a, subclass AH3N2. The present case indicates the potential development of encephalopathy in adults under certain conditions.

著者

Mohammad Musharraf Uddin BHUIYAN Yo SUZUKI Hiroyuki WATANABE Eunsong LEE Hiroki HIRAYAMA Koji MATSUOKA Yoshihiro FUJISE Hajime ISHIKAWA Seiji OHSUMI Yutaka FUKUI

出版者

日本繁殖生物学会

雑誌

Journal of Reproduction and Development (ISSN:09168818)

巻号頁・発行日

vol.56, no.1, pp.131-139, 2010 (Released:2010-03-05)

参考文献数

40

被引用文献数

4 10

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The objectives of this study were to choose an effective embryo reconstruction method and an effective post-activation agent for in vitro production of sei whale (Balaenoptera borealis) interspecies somatic cell nuclear transfer (iSCNT) embryos. Moreover, trichostatin A (TSA) treatment of whale iSCNT embryos was performed to improve the in vitro embryo development. In Experiment 1, the fusion rate was significantly higher (88.1%) in embryos reconstructed using the intracytoplasmic cell injection method (ICI) than that (48.7%) in the subzonal cell insertion (SUZI) counterpart. The rates of pseudopronucleus (PPN) formation (77.4 vs. 77.2%) and cleavage (24.5 vs. 37.0%) did not vary between ICI and SUZI. However, the PPN formation and cleavage rates were significantly (P<0.05) lower in the iSCNT embryos than in the parthenogenetic control (95.7% and 64.4%, respectively). Although 21.5% of the bovine parthenogenetic embryos developed to the blastocyst stage, no iSCNT embryo developed beyond the 6-cell stage. In Experiment 2, the cleavage rate did not vary between the TSA (50 nM)-treated and non-treated whale iSCNT embryos (30.5 vs. 32.3%, respectively). Moreover, it did not vary between the TSA-treated iSCNT and SCNT embryos (30.5 vs. 32.0%, respectively). Only one TSA non-treated iSCNT embryo developed to a compacted morula with 20 nuclei. One TSA-treated whale SCNT embryo developed to the 8-cell stage, and out of five whale iSCNT embryos, a 6-cell stage embryo was positive for whale DNA. In conclusion, bovine oocytes have the ability to support development of sei whale nuclei up to the 6-cell stage.

著者

石原 金由 宮田 洋 K. Ishihara Yo Miyata

雑誌

人文論究 (ISSN:02866773)

巻号頁・発行日

vol.30, no.3, pp.75-94, 1980-12-20

著者

沼田 恵太郎 宮田 洋 Keitaro Numata Yo Miyata

雑誌

人文論究 (ISSN:02866773)

巻号頁・発行日

vol.61, no.2, pp.55-88, 2011-09-20

著者

Yo KOBAYASHI Takahiro SATO Takeharu HOSHI Masakatsu G. FUJIE

出版者

一般社団法人 日本機械学会

雑誌

Journal of Biomechanical Science and Engineering (ISSN:18809863)

巻号頁・発行日

vol.7, no.3, pp.305-317, 2012 (Released:2012-06-15)

参考文献数

23

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Needle insertion treatments require accurate placement of a needle tip into the target cancer. However, it is difficult to insert the needle into a lesion because of tumor displacement during organ deformation. Therefore, path planning using a needle insertion simulation to analyze deformation of an organ is important for accurate needle insertion. A frictional model for needle insertion simulation is presented in this report. In particular, we focus on a model of frictional force based on the relative velocity between a needle and liver tissue ranging from hyper to slow velocity. In vitro experiments using porcine liver were performed at several relative velocities to measure the velocity dependence of the frictional force. Sixty trials of frictional force data were used to obtain average data at each relative velocity. The model of frictional force was then developed using the averages of the experimental results. This model was defined according to relative velocity, including hyper-slow velocity. Our modeling and experimental results show that the frictional force between the tissue and the needle increased during low relative velocity (under 1.5mm/s) and became constant (over 1.5mm/s).

著者

Masafumi Nakayama Nobuhiro Tanaka Kunihiro Sakoda Yohei Hokama Kou Hoshino Yo Kimura Masashi Ogawa Jun Yamashita Yuichi Kobori Takashi Uchiyama Yoshifusa Aizawa Akira Yamashina

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.79, no.3, pp.530-536, 2015-02-25 (Released:2015-02-25)

参考文献数

38

被引用文献数

20 19

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Background:Papaverine is useful for evaluating the functional status of a coronary artery, but it may provoke malignant ventricular arrhythmia (VA). The aim of this study was to investigate the incidence, and clinical and ECG characteristics of patients with papaverine-induced VAs.Methods and Results:The 182 consecutive patients underwent fractional flow reserve (FFR) measurement of 277 lesions. FFR was determined after intracoronary papaverine administration by standard procedures. The clinical and ECG characteristics were compared between patients with and without ventricular tachycardia (VT: ≥3 successive premature ventricular beats (PVBs), or ventricular fibrillation (VF)). After papaverine administration, the QTc interval, QTUc interval, and T-peak to U-end interval were prolonged significantly. Single PVBs on the T-wave or U-wave type developed in 29 patients (15.9%). Polymorphic VT (torsade de pointes) occurred in 5 patients (2.8%), and of those, VF developed in 3 patients (1.7%). No clinical and baseline ECG parameters were predictors for VT or VF except for sex and administration of papaverine into the left coronary artery. Excessive prolongation of QT (or QTU), T-peak to U-end intervals and giant T-U waves were found immediately prior to the ventricular tachyarrhythmias (VTAs), which were unpredictable from the baseline data.Conclusions:Intracoronary administration of papaverine induced fatal VTAs, although the incidence is rare. Excessive prolongation of the QT (and QTU) interval appeared prior to VTAs; however, they were unpredictable. (Circ J 2015; 79: 530–536)

著者

Yo Shinoda Masahiro Akiyama Takashi Toyama

出版者

The Pharmaceutical Society of Japan

雑誌

Biological and Pharmaceutical Bulletin (ISSN:09186158)

巻号頁・発行日

vol.46, no.9, pp.1162-1168, 2023-09-01 (Released:2023-09-01)

参考文献数

109

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Methylmercury (MeHg) is the causal substrate of Minamata disease and a major environmental toxicant. MeHg is widely distributed, mainly in the ocean, meaning its bioaccumulation in seafood is a considerable problem for human health. MeHg has been intensively investigated and is known to induce inflammatory responses and neurodegeneration. However, the relationship between MeHg-induced inflammatory responses and neurodegeneration is not understood. In the present review, we first describe recent findings showing an association between inflammatory responses and certain MeHg-unrelated neurological diseases caused by neurodegeneration. In addition, cell-specific MeHg-induced inflammatory responses are summarized for the central nervous system including those of microglia, astrocytes, and neurons. We also describe MeHg-induced inflammatory responses in peripheral cells and tissue, such as macrophages and blood. These findings provide a concept of the relationship between MeHg-induced inflammatory responses and neurodegeneration, as well as direction for future research of MeHg-induced neurotoxicity.

著者

Kenjirou Ogawa Takara Karitani Wataru Otsu Kazuo Nishiyama Hisato Kunitake Yo Goto Shota Nomiyama Hideaki Hara Masao Yamasaki

出版者

The Pharmaceutical Society of Japan

雑誌

BPB Reports (ISSN:2434432X)

巻号頁・発行日

vol.6, no.3, pp.87-97, 2023 (Released:2023-05-26)

参考文献数

29

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Background: Blue light causes retinal photoreceptor damage via oxidative and endoplasmic reticulum (ER) stress. A previous study showed that blueberry stem extract (BStEx) and its active components have cytoprotective effects against blue-light-induced photoreceptor cell damage by suppressing oxidative stress. This study demonstrated the inhibitory effect of BStEx against blue light-induced ER stress in photoreceptor cells. Methods: The photoreceptor cells treated with BStEx or the antioxidant N-Acetyl-L-cysteine (NAC) as a positive control were used and then exposed to blue light. The cytoprotective effects of BStEx and NAC were evaluated using CCK-8. The ER stress-related protein expression changes over time, and its levels were measured after each exposure time to blue light in photoreceptor cells treated with BStEx or NAC. Results: BStEx and NAC showed protective effects against blue-light-induced photoreceptor morphological abnormalities and cell damage. Although blue light triggered ER stress factors such as BiP, PERK, ATF6, eIF2α, ATF4, and CHOP, which in turn stimulated cell cycle arrest factors p53 and p21 and upregulation of apoptosis-inducing factors caspase-3. However, BStEx suppressed the increase in expression of BiP, ATF4, ATF6, CHOP, p53, p21, and caspase-3, but not mitochondrial apoptotic factors Bax and cytochrome c. Furthermore, the antioxidant NAC showed similar suppressive effects on BStEx. Conclusion: Our findings suggest that blue light-induced ER stress is primarily caused by oxidative stress, and BStEx might suppress ER stress via an antioxidant effect. The antioxidant NAC contributes to the cell proliferative capacity and suppression of apoptosis in photoreceptor cells.

著者

Yo Taniguchi Suguru Yokosawa Toru Shirai Ryota Sato Tomoki Amemiya Yoshihisa Soutome Yoshitaka Bito Hisaaki Ochi

出版者

Japanese Society for Magnetic Resonance in Medicine

雑誌

Magnetic Resonance in Medical Sciences (ISSN:13473182)

巻号頁・発行日

pp.mp.2021-0045, (Released:2022-07-30)

参考文献数

21

被引用文献数

3

---

Purpose: MR parameter mapping is a technique that obtains distributions of parameters such as relaxation time and proton density (PD) and is starting to be used for disease quantification in clinical diagnoses. Quantitative susceptibility mapping is also promising for the early diagnosis of brain disorders such as degenerative neurological disorders. Therefore, we developed an MR quantitative parameter mapping (QPM) method to map four tissue-related parameters (T1, T2*, PD, and susceptibility) and B1 simultaneously by using a 3D partially RF-spoiled gradient echo (pRSGE). We verified the accuracy and repeatability of QPM in phantom and volunteer experiments.Methods: Tissue-related parameters are estimated by varying four scan parameters of the 3D pRSGE: flip angle, RF-pulse phase increment, TR and TE, performing multiple image scans, and finding a least-squares fit for an intensity function (which expresses the relationship between the scan parameters and intensity values). The intensity function is analytically complex, but by using a Bloch simulation to create it numerically, the least-squares fitting can be used to estimate the quantitative values. This has the advantage of shortening the image-reconstruction processing time needed to estimate the quantitative values than with methods using pattern matching.Results: A 1.1-mm isotropic resolution scan covering the whole brain was completed with a scan time of approximately 12 minutes, and the reconstruction time using a GPU was approximately 1 minute. The phantom experiments confirmed that both the accuracy and repeatability of the quantitative values were high. The volunteer scans also confirmed that the accuracy of the quantitative values was comparable to that of conventional methods.Conclusion: The proposed QPM method can map T1, T2*, PD, susceptibility, and B1 simultaneously within a scan time that can be applied to human subjects.

著者

Daisuke Hori Yuichi Oi Shotaro Doki Tsukasa Takahashi Tomohiko Ikeda Yu Ikeda Yo Arai Kei Muroi Hiroaki Sasaki Mami Ishitsuka Asako Matsuura Wyi Go Ichiyo Matsuzaki Shinichiro Sasahara

出版者

The Japanese Society for Hygiene

雑誌

Environmental Health and Preventive Medicine (ISSN:1342078X)

巻号頁・発行日

vol.27, pp.17, 2022 (Released:2022-04-16)

参考文献数

7

被引用文献数

1

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Background: Ibaraki’s Amabie-chan is a COVID-19 infection control system unique to Ibaraki prefecture, Japan. It requires residents to register each time they visit events, commercial facilities, and restaurants. The number of registrations has been limited, and its function alerting about people positive for COVID-19 infection seems not to be working. Nevertheless, registration with the system might have some impact on the user’s behavior. In the current preliminary survey, the possible impact of Ibaraki’s Amabie-chan on infection prevention behavior and fear of COVID-19 was investigated.Methods: A cross-sectional, web-based, anonymous, and self-administered survey was conducted at two workplaces in Tsukuba Science City, Ibaraki, Japan. The first survey was conducted at one of the workplaces in November 2020, and the second survey, at the other workplace in February 2021. Variables of interest were sex, age group, marital status, employment status, Ibaraki’s Amabie-chan use, COVID-19 Contact-Confirming Application use, ten items of infection prevention behaviors, and fear of COVID-19. Hierarchical linear regression analysis was performed.Results: In both surveys, use of Ibaraki’s Amabie-chan was significantly associated with COCOA use and with “physical condition management such as body temperature measurement.” No association was found with other infection prevention behaviors or with fear of COVID-19.Conclusions: Our findings did not provide sufficient evidence for the effectiveness of Ibaraki’s Amabie-chan in regard to users’ infection control behavior. Further detailed study is needed to investigate the effectiveness in terms of infection prevention and the cost-effectiveness of Ibaraki’s Amabie-chan.

著者

Hirotaka Yamamoto Mami Iima Yo Kishimoto Ayami Ohno Kishimoto Sho Koyasu Akira Yamamoto Yoshitaka Kawai Akira Yoshizawa Koichi Omori

出版者

Japanese Society for Magnetic Resonance in Medicine

雑誌

Magnetic Resonance in Medical Sciences (ISSN:13473182)

巻号頁・発行日

pp.mp.2021-0149, (Released:2022-03-04)

参考文献数

26

被引用文献数

1

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Purpose: To evaluate whether readout-segmented echo-planar imaging (RS-EPI) diffusion-weighted imaging (DWI) can reduce image distortion and improve the lesion identification in parathyroid adenomas (PTAs) compared to single-shot EPI (SS-EPI) DWI, and to determine whether PTAs can be differentiated from other soft tissue structures of the head and neck region by using the apparent diffusion coefficient (ADC) value.Methods: We retrospectively analyzed the preoperative MR images including DWI of 24 patients with surgically confirmed PTA. RS-EPI and SS-EPI DWI were evaluated by two independent readers for the identification of the lesions and distortion. The ADC values of the PTAs were compared with those of thyroid glands and cervical lymph nodes.Results: RS-EPI provided significantly less distortion compared to SS-EPI. RS-EPI tended to have better lesion identification compared with SS-EPI without a statistically significant difference. On SS-EPI, the PTAs had significantly higher ADC values compared with the cervical lymph nodes. On RS-EPI, the PTAs had significantly higher ADC values compared with the thyroid glands and cervical lymph nodes.Conclusion: RS-EPI reduces the DWI distortion in PTAs. The ADC value obtained using RS-EPI enables the differentiation of PTAs from nearby structures, such as thyroid glands and cervical lymph nodes.

著者

Yo Seph Choi Seongsin Jeon Woo Chool Park

出版者

The Institute of Electronics, Information and Communication Engineers

雑誌

IEICE Proceeding Series

巻号頁・発行日

no.61, pp.1037-1040, 2016

著者

藤原 曜 Yo Fujiwara

出版者

関西学院大学フランス学会

雑誌

年報・フランス研究 = Bulletin annuel d'etudes francaises (ISSN:09109757)

巻号頁・発行日

no.46, pp.65-81, 2012

著者

Chung-Yi Lo Hsueh-Ling Cheng Jue-Liang Hsu Ming-Hui Liao Rong-Lang Yen Yo-Chia Chen

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.61, no.6, pp.604-610, 2013-06-01 (Released:2013-06-01)

参考文献数

28

被引用文献数

2 4

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Three phenyl derivatives of butyrate, 2-phenylbutyrate (2-PB), 3-phenylbutyrate (3-PB) and 4-phenylbutyrate (4-PB), were evaluated in terms of their antibacterial and cytotoxic activities. Our results indicated that PBs demonstrated specific inhibitory activity against Helicobacter pylori and Escherichia coli but did not influence the growth of Bifidobacterium bifidium and Lactobacillus reuteri. PBs also exhibited synergistic effects on H. pylori ATCC 43504 especially at pH 5.5. In the protein expression profiles in H. pylori treated by phenylbutyrates, we also found that three protein spots identified as oxidative stress-related proteins were significantly up-regulated, confirming the response of H. pylori when exposed to PBs. Due to their antibacterial activities and low or slight cytotoxicities, PBs are potential candidates for the treatment of H. pylori infection. This is the first study to discover the antibiotic effects of 2-PB, 3-PB and 4-PB (Buphenyl).

著者

Yo Shinoda Yuta Yamada Eiko Yoshida Tsutomu Takahashi Yayoi Tsuneoka Komyo Eto Toshiyuki Kaji Yasuyuki Fujiwara

出版者

The Japanese Society of Toxicology

雑誌

The Journal of Toxicological Sciences (ISSN:03881350)

巻号頁・発行日

vol.46, no.6, pp.303-309, 2021 (Released:2021-06-01)

参考文献数

52

被引用文献数

1

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Methylmercury (MeHg), the causal substrate in Minamata disease, can lead to severe and chronic neurological disorders. The main symptom of Minamata disease is sensory impairment in the four extremities; however, the sensitivity of individual sensory modalities to MeHg has not been investigated extensively. In the present study, we performed stimulus-response behavioral experiments in MeHg-exposed rats to compare the sensitivities to pain, heat, cold, and mechanical sensations. MeHg (6.7 mg/kg/day) was orally administered to 9-week-old Wistar rats for 5 days and discontinued for 2 days, then administered daily for another 5 days. The four behavioral experiments were performed daily on each rat from the beginning of MeHg treatment for 68 days. The pain sensation decreased significantly from day 11 onwards, but recovered to control levels on day 48. Other sensory modalities were not affected by MeHg exposure. These findings suggest that the pain sensation is the sensory modality most susceptive to MeHg toxicity and that this sensitivity is reversible following discontinuation of the exposure.

著者

Eri Akita Yaxiaer Yalikun Kazunori Okano Yuki Yamasaki Misato Ohtani Yo Tanaka Taku Demura Yoichiroh Hosokawa

出版者

Japanese Society for Plant Biotechnology

雑誌

Plant Biotechnology (ISSN:13424580)

巻号頁・発行日

vol.37, no.4, pp.417-422, 2020-12-25 (Released:2020-12-25)

参考文献数

23

被引用文献数

1 4

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Atomic force microscopy (AFM) can measure the mechanical properties of plant tissue at the cellular level, but for in situ observations, the sample must be held in place on a rigid support and it is difficult to obtain accurate data for living plants without inhibiting their growth. To investigate the dynamics of root cell stiffness during seedling growth, we circumvented these problems by using an array of glass micropillars as a support to hold an Arabidopsis thaliana root for AFM measurements without inhibiting root growth. The root elongated in the gaps between the pillars and was supported by the pillars. The AFM cantilever could contact the root for repeated measurements over the course of root growth. The elasticity of the root epidermal cells was used as an index of the stiffness. By contrast, we were not able to reliably observe roots on a smooth glass substrate because it was difficult to retain contact between the root and the cantilever without the support of the pillars. Using adhesive to fix the root on the smooth glass plane overcame this issue, but prevented root growth. The glass micropillar support allowed reproducible measurement of the spatial and temporal changes in root cell elasticity, making it possible to perform detailed AFM observations of the dynamics of root cell stiffness.

著者

Yoshinori YASUDA Hitoshi FUKUSAWA Katsuya GOTANDA Takashi NAKAGAWA Pavel E. TARASSOV Kotoba NISHIDA Megumi KATO Yuki SAWAI Arata MOMOHARA Toshiyuki FUJIKI Hiroo NASU Junko KITAGAWA Kazuyoshi YAMADA Chiharu KOROGI Mitsuru OKUNO Shuji IWATA Zhekun ZHOU Toshiro NARUSE Shinichi YATAGAI Manabu KOBAYASHI Manabu TAKAHASHI Tatsunori KAWASUMI Yoshimune MORITA Tomio KURODA Azusa YANO Yo-Ichiro SATO Yuichi MORI Masaaki KANEHARA Yasushi MOTOKI

出版者

The Association of Japanese Geographers

雑誌

地理学評論 (ISSN:13479555)

巻号頁・発行日

vol.75, no.5, pp.384-390, 2002-04-01 (Released:2008-12-25)

著者

Aidala C. Akiba Y. Alfred M. Andrieux V. Apadula N. Asano H. Azmoun B. Babintsev V. Bandara N. S. Barish K. N. Bathe S. Bazilevsky A. Beaumier M. Belmont R. Berdnikov A. Berdnikov Y. Blau D. S. Bok J. S. Brooks M. L. Bryslawskyj J. Bumazhnov V. Campbell S. Canoa Roman V. Cervantes R. Chi C. Y. Chiu M. Choi I. J. Choi J. B. Citron Z. Connors M. Cronin N. Csanád M. Csörgő T. Danley T. W. Daugherity M. S. David G. DeBlasio K. Dehmelt K. Denisov A. Deshpande A. Desmond E. J. Dion A. Dixit D. Do J. H. Drees A. Drees K. A. Durham J. M. Durum A. Enokizono A. En'yo H. Esumi S. Fadem B. Fan W. Feege N. Fields D. E. Finger M. Finger M. Fokin S. L. Frantz J. E. Franz A. Frawley A. D. Fukuda Y. Gal C. Gallus P. Gamez E. A. Garg P. Ge H. Giordano F. Goto Y. Grau N. Greene S. V. Grosse Perdekamp M. Gunji T. Guragain H. Hachiya T. Haggerty J. S. Hahn K. I. Hamagaki H. Hamilton H. F. Han S. Y. Hanks J. Hasegawa S. Haseler T. O. S. He X. Hemmick T. K. Hill J. C. Hill K. Hodges A. Hollis R. S. Homma K. Hong B. Hoshino T. Hotvedt N. Huang J. Huang S. Imai K. Inaba M. Iordanova A. Isenhower D. Ishimaru S. Ivanishchev D. Jacak B. V. Jezghani M. Ji Z. Jiang X. Johnson B. M. Jouan D. Jumper D. S. Kang J. H. Kapukchyan D. Karthas S. Kawall D. Kazantsev A. V. Khachatryan V. Khanzadeev A. Kim C. Kim E.-J. Kim M. Kincses D. Kistenev E. Klatsky J. Kline P. Koblesky T. Kotov D. Kudo S. Kurgyis B. Kurita K. Kwon Y. Lajoie J. G. Lebedev A. Lee S. Lee S. H. Leitch M. J. Leung Y. H. Lewis N. A. Li X. Lim S. H. Liu M. X. Loggins V.-R. Lökös S. Lovasz K. Lynch D. Majoros T. Makdisi Y. I. Makek M. Manko V. I. Mannel E. McCumber M. McGaughey P. L. McGlinchey D. McKinney C. Mendoza M. Metzger W. J. Mignerey A. C. Milov A. Mishra D. K. Mitchell J. T. Mitrankov Iu. Mitsuka G. Miyasaka S. Mizuno S. Montuenga P. Moon T. Morrison D. P. Morrow S. I. Murakami T. Murata J. Nagai K. Nagashima K. Nagashima T. Nagle J. L. Nagy M. I. Nakagawa I. Nakano K. Nattrass C. Nelson S. Niida T. Nishitani R. Nouicer R. Novák T. Novitzky N. Nyanin A. S. O'Brien E. Ogilvie C. A. Orjuela Koop J. D. Osborn J. D. Oskarsson A. Ottino G. J. Ozawa K. Pantuev V. Papavassiliou V. Park J. S. Park S. Pate S. F. Patel M. Peng W. Perepelitsa D. V. Perera G. D. N. Peressounko D. Yu. PerezLara C. E. Perry J. Petti R. Phipps M. Pinkenburg C. Pisani R. P. Pun A. Purschke M. L. Radzevich P. V. Read K. F. Reynolds D. Riabov V. Riabov Y. Richford D. Rinn T. Rolnick S. D. Rosati M. Rowan Z. Runchey J. Safonov A. S. Sakaguchi T. Sako H. Samsonov V. Sarsour M. Sato S. Scarlett C. Y. Schaefer B. Schmoll B. K. Sedgwick K. Seidl R. Sen A. Seto R. Sexton A. Sharma D. Shein I. Shibata T.-A. Shigaki K. Shimomura M. Shioya T. Shukla P. Sickles A. Silva C. L. Silvermyr D. Singh B. K. Singh C. P. Singh V. Skoby M. J. Slunečka M. Smith K. L. Snowball M. Soltz R. A. Sondheim W. E. Sorensen S. P. Sourikova I. V. Stankus P. W. Stoll S. P. Sugitate T. Sukhanov A. Sumita T. Sun J. Sun Z. Suzuki S. Sziklai J. Tanida K. Tannenbaum M. J. Tarafdar S. Taranenko A. Tarnai G. Tieulent R. Timilsina A. Todoroki T. Tomášek M. Towell C. L. Towell R. S. Tserruya I. Ueda Y. Ujvari B. van Hecke H. W. Velkovska J. Virius M. Vrba V. Vukman N. Wang X. R. Wang Z. Watanabe Y. S. Wong C. P. Woody C. L. Xu C. Xu Q. Xue L. Yalcin S. Yamaguchi Y. L. Yamamoto H. Yanovich A. Yoo J. H. Yoon I. Yu H. Yushmanov I. E. Zajc W. A. Zelenski A. Zhai Y. Zharko S. Zou L.

出版者

American Physical Society (APS)

雑誌

Physical Review D (ISSN:24700010)

巻号頁・発行日

no.99, 2019-05-13

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Measurements of the differential production of electrons from open-heavy-flavor hadrons with charm- and bottom-quark content in p+p collisions at √s=200 GeV are presented. The measurements proceed through displaced-vertex analyses of electron tracks from the semileptonic decay of charm and bottom hadrons using the PHENIX silicon-vertex detector. The relative contribution of electrons from bottom decays to inclusive heavy-flavor-electron production is found to be consistent with fixed-order-plus-next-to-leading-log perturbative-QCD calculations within experimental and theoretical uncertainties. These new measurements in p+p collisions provide a precision baseline for comparable forthcoming measurements in A+A collisions.