TY - JOUR
T1 - Exotic colored scalars at the LHC
AU - Blum, Kfir
AU - Efrati, Aielet
AU - Frugiuele, Claudia
AU - Nir, Yosef
N1 - We thank Daniel Aloni, Liron Barak, Jared Evans, Zhen Liu, Adam Martin, Gilad Perez and Tomer Volansky for useful discussions. We thank Yevgeny Kats for helpful comments on the manuscript. YN is the Amos de-Shalit chair of theoretical physics. This research is supported by the I-CORE program of the Planning and Budgeting Committee and the Israel Science Foundation (grant number 1937/12). YN is supported by grants from the Israel Science Foundation (grant number 394/16), from the United States-Israel Binational Science Foundation (BSF), Jerusalem, Israel (grant number 2014230), and from the Minerva Foundation. The work of CF was carried out in part at the Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1066293. Article funded by SCOAP
PY - 2017/2/21
Y1 - 2017/2/21
N2 - We study the phenomenology of exotic color-triplet scalar particles X with charge |Q| = 2/3, 4/3, 5/3, 7/3, 8/3 and 10/3. If X is an SU(2)W-non-singlet, mass splitting within the multiplet allows for cascade decays of the members into the lightest state. We study examples where the lightest state, in turn, decays into a three-body W±jj final state, and show that in such case the entire multiplet is compatible with indirect precision tests and with direct collider searches for continuum pair production of X down to mX ∼ 250 GeV. However, bound states S, made of XX† pairs at mS ≈ 2mX, form under rather generic conditions and their decay to diphoton can be the first discovery channel of the model. Furthermore, for SU(2)W-non-singlets, the mode S → W+W− may be observable and the width of S → γγ and S → jj may appear large as a consequence of mass splittings within the X-multiplet. As an example we study in detail the case of an SU(2)W-quartet, finding that mX ≃ 450 GeV is allowed by all current searches.
AB - We study the phenomenology of exotic color-triplet scalar particles X with charge |Q| = 2/3, 4/3, 5/3, 7/3, 8/3 and 10/3. If X is an SU(2)W-non-singlet, mass splitting within the multiplet allows for cascade decays of the members into the lightest state. We study examples where the lightest state, in turn, decays into a three-body W±jj final state, and show that in such case the entire multiplet is compatible with indirect precision tests and with direct collider searches for continuum pair production of X down to mX ∼ 250 GeV. However, bound states S, made of XX† pairs at mS ≈ 2mX, form under rather generic conditions and their decay to diphoton can be the first discovery channel of the model. Furthermore, for SU(2)W-non-singlets, the mode S → W+W− may be observable and the width of S → γγ and S → jj may appear large as a consequence of mass splittings within the X-multiplet. As an example we study in detail the case of an SU(2)W-quartet, finding that mX ≃ 450 GeV is allowed by all current searches.
UR - http://www.scopus.com/inward/record.url?scp=85013500034&partnerID=8YFLogxK
U2 - 10.1007/JHEP02(2017)104
DO - 10.1007/JHEP02(2017)104
M3 - مقالة
SN - 1126-6708
VL - 2017
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 2
M1 - 104
ER -